Vulnerabilities > CVE-2019-0841 - Link Following vulnerability in Microsoft products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-0730, CVE-2019-0731, CVE-2019-0796, CVE-2019-0805, CVE-2019-0836.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 6 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Symlink Attack An attacker positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name. The endpoint file may be either output or input. If the file is output, the result is that the endpoint is modified, instead of a file at the intended location. Modifications to the endpoint file may include appending, overwriting, corrupting, changing permissions, or other modifications. In some variants of this attack the attacker may be able to control the change to a file while in other cases they cannot. The former is especially damaging since the attacker may be able to grant themselves increased privileges or insert false information, but the latter can also be damaging as it can expose sensitive information or corrupt or destroy vital system or application files. Alternatively, the endpoint file may serve as input to the targeted application. This can be used to feed malformed input into the target or to cause the target to process different information, possibly allowing the attacker to control the actions of the target or to cause the target to expose information to the attacker. Moreover, the actions taken on the endpoint file are undertaken with the permissions of the targeted user or application, which may exceed the permissions that the attacker would normally have.
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- Leverage Executable Code in Non-Executable Files An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
- Manipulating Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Exploit-Db
id EDB-ID:47128 last seen 2019-07-16 modified 2019-07-16 published 2019-07-16 reporter Exploit-DB source https://www.exploit-db.com/download/47128 title Microsoft Windows 10 < build 17763 - AppXSvc Hard Link Privilege Escalation (Metasploit) file exploits/windows/local/46683.txt id EDB-ID:46683 last seen 2019-04-09 modified 2019-04-09 platform windows port published 2019-04-09 reporter Exploit-DB source https://www.exploit-db.com/download/46683 title Microsoft Windows - AppX Deployment Service Privilege Escalation type local id EDB-ID:46976 last seen 2019-06-07 modified 2019-06-07 published 2019-06-07 reporter Exploit-DB source https://www.exploit-db.com/download/46976 title Microsoft Windows - AppX Deployment Service Local Privilege Escalation (3) id EDB-ID:46938 last seen 2019-05-29 modified 2019-05-23 published 2019-05-23 reporter Exploit-DB source https://www.exploit-db.com/download/46938 title Microsoft Windows - AppX Deployment Service Local Privilege Escalation (2)
Metasploit
| description | There exists a privilege escalation vulnerability for Windows 10 builds prior to build 17763. Due to the AppXSvc's improper handling of hard links, a user can gain full privileges over a SYSTEM-owned file. The user can then utilize the new file to execute code as SYSTEM. This module employs a technique using the Diagnostics Hub Standard Collector Service (DiagHub) which was discovered by James Forshaw to load and execute a DLL as SYSTEM. |
| id | MSF:EXPLOIT/WINDOWS/LOCAL/APPXSVC_HARD_LINK_PRIVESC |
| last seen | 2020-06-14 |
| modified | 2019-07-09 |
| published | 2019-06-06 |
| references |
|
| reporter | Rapid7 |
| source | https://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/windows/local/appxsvc_hard_link_privesc.rb |
| title | AppXSvc Hard Link Privilege Escalation |
Nessus
NASL family Windows : Microsoft Bulletins NASL id SMB_NT_MS19_APR_4493474.NASL description The remote Windows host is missing security update 4493474. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A tampering vulnerability exists when Microsoft browsers do not properly validate input under specific conditions. An attacker who exploited the vulnerability could pass custom command line parameters. (CVE-2019-0764) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0752, CVE-2019-0753, CVE-2019-0862) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0844) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0739) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0829, CVE-2019-0860, CVE-2019-0861) - An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0835) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) last seen 2020-06-01 modified 2020-06-02 plugin id 123946 published 2019-04-09 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123946 title KB4493474: Windows 10 Version 1703 April 2019 Security Update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the Microsoft Security Updates API. The text # itself is copyright (C) Microsoft Corporation. # include("compat.inc"); if (description) { script_id(123946); script_version("1.11"); script_cvs_date("Date: 2020/01/22"); script_cve_id( "CVE-2019-0685", "CVE-2019-0688", "CVE-2019-0730", "CVE-2019-0731", "CVE-2019-0732", "CVE-2019-0735", "CVE-2019-0739", "CVE-2019-0752", "CVE-2019-0753", "CVE-2019-0764", "CVE-2019-0790", "CVE-2019-0791", "CVE-2019-0792", "CVE-2019-0793", "CVE-2019-0794", "CVE-2019-0795", "CVE-2019-0796", "CVE-2019-0802", "CVE-2019-0803", "CVE-2019-0805", "CVE-2019-0806", "CVE-2019-0810", "CVE-2019-0812", "CVE-2019-0814", "CVE-2019-0829", "CVE-2019-0835", "CVE-2019-0836", "CVE-2019-0837", "CVE-2019-0838", "CVE-2019-0839", "CVE-2019-0841", "CVE-2019-0842", "CVE-2019-0844", "CVE-2019-0845", "CVE-2019-0846", "CVE-2019-0847", "CVE-2019-0848", "CVE-2019-0849", "CVE-2019-0851", "CVE-2019-0853", "CVE-2019-0856", "CVE-2019-0859", "CVE-2019-0860", "CVE-2019-0861", "CVE-2019-0862", "CVE-2019-0877", "CVE-2019-0879" ); script_xref(name:"MSKB", value:"4493474"); script_xref(name:"MSFT", value:"MS19-4493474"); script_name(english:"KB4493474: Windows 10 Version 1703 April 2019 Security Update"); script_summary(english:"Checks for rollup."); script_set_attribute(attribute:"synopsis", value: "The remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote Windows host is missing security update 4493474. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A tampering vulnerability exists when Microsoft browsers do not properly validate input under specific conditions. An attacker who exploited the vulnerability could pass custom command line parameters. (CVE-2019-0764) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0752, CVE-2019-0753, CVE-2019-0862) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0844) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0739) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0829, CVE-2019-0860, CVE-2019-0861) - An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0835) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796)"); # https://support.microsoft.com/en-us/help/4493474/windows-10-update-kb4493474 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8d95979f"); script_set_attribute(attribute:"solution", value: "Apply Cumulative Update KB4493474."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0853"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'AppXSvc Hard Link Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"exploit_framework_canvas", value:"true"); script_set_attribute(attribute:"canvas_package", value:'CANVAS'); script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows : Microsoft Bulletins"); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("smb_check_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl"); script_require_keys("SMB/MS_Bulletin_Checks/Possible"); script_require_ports(139, 445, "Host/patch_management_checks"); exit(0); } include("audit.inc"); include("smb_hotfixes_fcheck.inc"); include("smb_hotfixes.inc"); include("smb_func.inc"); include("misc_func.inc"); get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible"); bulletin = "MS19-04"; kbs = make_list('4493474'); if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE); get_kb_item_or_exit("SMB/Registry/Enumerated"); get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1); if (hotfix_check_sp_range(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN); share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE); if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share); if ( smb_check_rollup(os:"10", sp:0, os_build:"15063", rollup_date:"04_2019", bulletin:bulletin, rollup_kb_list:[4493474]) ) { replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE); hotfix_security_hole(); hotfix_check_fversion_end(); exit(0); } else { hotfix_check_fversion_end(); audit(AUDIT_HOST_NOT, hotfix_get_audit_report()); }NASL family Windows : Microsoft Bulletins NASL id SMB_NT_MS19_APR_4493441.NASL description The remote Windows host is missing security update 4493441. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853) last seen 2020-06-01 modified 2020-06-02 plugin id 123939 published 2019-04-09 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123939 title KB4493441: Windows 10 Version 1709 and Windows Server Version 1709 April 2019 Security Update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the Microsoft Security Updates API. The text # itself is copyright (C) Microsoft Corporation. # include("compat.inc"); if (description) { script_id(123939); script_version("1.11"); script_cvs_date("Date: 2020/01/22"); script_cve_id( "CVE-2019-0685", "CVE-2019-0688", "CVE-2019-0730", "CVE-2019-0731", "CVE-2019-0732", "CVE-2019-0735", "CVE-2019-0786", "CVE-2019-0790", "CVE-2019-0791", "CVE-2019-0792", "CVE-2019-0793", "CVE-2019-0794", "CVE-2019-0795", "CVE-2019-0796", "CVE-2019-0802", "CVE-2019-0803", "CVE-2019-0805", "CVE-2019-0814", "CVE-2019-0836", "CVE-2019-0837", "CVE-2019-0838", "CVE-2019-0839", "CVE-2019-0840", "CVE-2019-0841", "CVE-2019-0842", "CVE-2019-0844", "CVE-2019-0845", "CVE-2019-0846", "CVE-2019-0847", "CVE-2019-0848", "CVE-2019-0849", "CVE-2019-0851", "CVE-2019-0853", "CVE-2019-0856", "CVE-2019-0859", "CVE-2019-0877", "CVE-2019-0879" ); script_xref(name:"MSKB", value:"4493441"); script_xref(name:"MSFT", value:"MS19-4493441"); script_name(english:"KB4493441: Windows 10 Version 1709 and Windows Server Version 1709 April 2019 Security Update"); script_summary(english:"Checks for rollup."); script_set_attribute(attribute:"synopsis", value: "The remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote Windows host is missing security update 4493441. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853)"); # https://support.microsoft.com/en-us/help/4493441/windows-10-update-kb4493441 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?61049c0e"); script_set_attribute(attribute:"solution", value: "Apply Cumulative Update KB4493441."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0853"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'AppXSvc Hard Link Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"exploit_framework_canvas", value:"true"); script_set_attribute(attribute:"canvas_package", value:'CANVAS'); script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows : Microsoft Bulletins"); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("smb_check_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl"); script_require_keys("SMB/MS_Bulletin_Checks/Possible"); script_require_ports(139, 445, "Host/patch_management_checks"); exit(0); } include("audit.inc"); include("smb_hotfixes_fcheck.inc"); include("smb_hotfixes.inc"); include("smb_func.inc"); include("misc_func.inc"); get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible"); bulletin = "MS19-04"; kbs = make_list('4493441'); if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE); get_kb_item_or_exit("SMB/Registry/Enumerated"); get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1); if (hotfix_check_sp_range(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN); share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE); if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share); if ( smb_check_rollup(os:"10", sp:0, os_build:"16299", rollup_date:"04_2019", bulletin:bulletin, rollup_kb_list:[4493441]) ) { replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE); hotfix_security_hole(); hotfix_check_fversion_end(); exit(0); } else { hotfix_check_fversion_end(); audit(AUDIT_HOST_NOT, hotfix_get_audit_report()); }NASL family Windows : Microsoft Bulletins NASL id SMB_NT_MS19_APR_4493464.NASL description The remote Windows host is missing security update 4493464. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853) last seen 2020-06-01 modified 2020-06-02 plugin id 123942 published 2019-04-09 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123942 title KB4493464: Windows 10 Version 1803 and Windows Server Version 1803 April 2019 Security Update code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the Microsoft Security Updates API. The text # itself is copyright (C) Microsoft Corporation. # include("compat.inc"); if (description) { script_id(123942); script_version("1.11"); script_cvs_date("Date: 2020/01/22"); script_cve_id( "CVE-2019-0685", "CVE-2019-0688", "CVE-2019-0730", "CVE-2019-0731", "CVE-2019-0732", "CVE-2019-0735", "CVE-2019-0786", "CVE-2019-0790", "CVE-2019-0791", "CVE-2019-0792", "CVE-2019-0793", "CVE-2019-0794", "CVE-2019-0795", "CVE-2019-0796", "CVE-2019-0802", "CVE-2019-0803", "CVE-2019-0805", "CVE-2019-0814", "CVE-2019-0836", "CVE-2019-0837", "CVE-2019-0838", "CVE-2019-0839", "CVE-2019-0840", "CVE-2019-0841", "CVE-2019-0842", "CVE-2019-0844", "CVE-2019-0845", "CVE-2019-0846", "CVE-2019-0847", "CVE-2019-0848", "CVE-2019-0849", "CVE-2019-0851", "CVE-2019-0853", "CVE-2019-0856", "CVE-2019-0859", "CVE-2019-0877", "CVE-2019-0879" ); script_xref(name:"MSKB", value:"4493464"); script_xref(name:"MSFT", value:"MS19-4493464"); script_name(english:"KB4493464: Windows 10 Version 1803 and Windows Server Version 1803 April 2019 Security Update"); script_summary(english:"Checks for rollup."); script_set_attribute(attribute:"synopsis", value: "The remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote Windows host is missing security update 4493464. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An information disclosure vulnerability exists when DirectX improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. An authenticated attacker could exploit this vulnerability by running a specially crafted application. The update addresses the vulnerability by correcting how DirectX handles objects in memory. (CVE-2019-0837) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853)"); # https://support.microsoft.com/en-us/help/4493464/windows-10-update-kb4493464 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e3ea96dc"); script_set_attribute(attribute:"solution", value: "Apply Cumulative Update KB4493464."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-0853"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'AppXSvc Hard Link Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"exploit_framework_canvas", value:"true"); script_set_attribute(attribute:"canvas_package", value:'CANVAS'); script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/09"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows : Microsoft Bulletins"); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("smb_check_rollup.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl"); script_require_keys("SMB/MS_Bulletin_Checks/Possible"); script_require_ports(139, 445, "Host/patch_management_checks"); exit(0); } include("audit.inc"); include("smb_hotfixes_fcheck.inc"); include("smb_hotfixes.inc"); include("smb_func.inc"); include("misc_func.inc"); get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible"); bulletin = "MS19-04"; kbs = make_list('4493464'); if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE); get_kb_item_or_exit("SMB/Registry/Enumerated"); get_kb_item_or_exit("SMB/WindowsVersion", exit_code:1); if (hotfix_check_sp_range(win10:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN); share = hotfix_get_systemdrive(as_share:TRUE, exit_on_fail:TRUE); if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share); if ( smb_check_rollup(os:"10", sp:0, os_build:"17134", rollup_date:"04_2019", bulletin:bulletin, rollup_kb_list:[4493464]) ) { replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE); hotfix_security_hole(); hotfix_check_fversion_end(); exit(0); } else { hotfix_check_fversion_end(); audit(AUDIT_HOST_NOT, hotfix_get_audit_report()); }NASL family Windows : Microsoft Bulletins NASL id SMB_NT_MS19_APR_4493509.NASL description The remote Windows host is missing security update 4493509. It is, therefore, affected by multiple vulnerabilities : - A security feature bypass vulnerability exists in Windows which could allow an attacker to bypass Device Guard when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could circumvent a User Mode Code Integrity (UMCI) policy on the machine. (CVE-2019-0732) - An information disclosure vulnerability exists when the Terminal Services component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise a users system. (CVE-2019-0839) - An information disclosure vulnerability exists when the Windows TCP/IP stack improperly handles fragmented IP packets. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0688) - An information disclosure vulnerability exists when the Windows kernel improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the users system. (CVE-2019-0840, CVE-2019-0844) - A tampering vulnerability exists when Microsoft browsers do not properly validate input under specific conditions. An attacker who exploited the vulnerability could pass custom command line parameters. (CVE-2019-0764) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0730, CVE-2019-0731, CVE-2019-0805, CVE-2019-0836) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0752, CVE-2019-0753, CVE-2019-0862) - An information disclosure vulnerability exists when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. There are multiple ways an attacker could exploit the vulnerability, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in memory. (CVE-2019-0802, CVE-2019-0849) - A remote code execution vulnerability exists when OLE automation improperly handles objects in memory. An attacker who successfully exploited the vulnerability could gain execution on the victim system. (CVE-2019-0794) - A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0845) - A remote code execution vulnerability exists in the way that the Windows Graphics Device Interface (GDI) handles objects in the memory. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0853) - A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0842) - A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0739) - A remote code execution vulnerability exists when the Windows Jet Database Engine improperly handles objects in memory. An attacker who successfully exploited this vulnerability could execute arbitrary code on a victim system. An attacker could exploit this vulnerability by enticing a victim to open a specially crafted file. The update addresses the vulnerability by correcting the way the Windows Jet Database Engine handles objects in memory. (CVE-2019-0846, CVE-2019-0847, CVE-2019-0851, CVE-2019-0877, CVE-2019-0879) - An elevation of privilege vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0735) - An information disclosure vulnerability exists when Windows Task Scheduler improperly discloses credentials to Windows Credential Manager. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0838) - An elevation of privilege vulnerability exists when Windows AppX Deployment Service (AppXSVC) improperly handles hard links. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data. (CVE-2019-0841) - An information disclosure vulnerability exists when Microsoft Edge improperly handles objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0833) - A remote code execution vulnerability exists when Windows improperly handles objects in memory. An attacker who successfully exploited these vulnerabilities could take control of an affected system. (CVE-2019-0856) - An information disclosure vulnerability exists when the win32k component improperly provides kernel information. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0814, CVE-2019-0848) - An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2019-0685, CVE-2019-0803, CVE-2019-0859) - An elevation of privilege vulnerability exists in the Microsoft Server Message Block (SMB) Server when an attacker with valid credentials attempts to open a specially crafted file over the SMB protocol on the same machine. An attacker who successfully exploited this vulnerability could bypass certain security checks in the operating system. (CVE-2019-0786) - A remote code execution vulnerability exists when the Microsoft XML Core Services MSXML parser processes user input. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the users system. (CVE-2019-0790, CVE-2019-0791, CVE-2019-0792, CVE-2019-0793, CVE-2019-0795) - A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2019-0806, CVE-2019-0810, CVE-2019-0812, CVE-2019-0829, CVE-2019-0860, CVE-2019-0861) - An information disclosure vulnerability exists when the scripting engine does not properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the users system. (CVE-2019-0835) - An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could set the short name of a file with a long name to an arbitrary short name, overriding the file system with limited privileges. (CVE-2019-0796) last seen 2020-06-01 modified 2020-06-02 plugin id 123948 published 2019-04-09 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123948 title KB4493509: Windows 10 Version 1809 and Windows Server 2019 April 2019 Security Update
Packetstorm
data source https://packetstormsecurity.com/files/download/153642/appxsvc_hard_link_privesc.rb.txt id PACKETSTORM:153642 last seen 2019-07-15 published 2019-07-15 reporter James Forshaw source https://packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html title AppXSvc Hard Link Privilege Escalation data source https://packetstormsecurity.com/files/download/155653/appxsvc17763-overwrite.txt id PACKETSTORM:155653 last seen 2019-12-13 published 2019-12-11 reporter Gabor Seljan source https://packetstormsecurity.com/files/155653/AppXSvc-17763-Arbitrary-File-Overwrite.html title AppXSvc 17763 Arbitrary File Overwrite
The Hacker News
id THN:81366755F08906BF9AF558F6E95E345D last seen 2019-06-07 modified 2019-06-07 published 2019-06-07 reporter The Hacker News source https://thehackernews.com/2019/06/windows-eop-exploit.html title Hacker Discloses Second Zero-Day to Bypass Patch for Windows EoP Flaw id THN:351044C6D115694265C4F1067C3EB65D last seen 2019-05-23 modified 2019-05-23 published 2019-05-23 reporter The Hacker News source https://thehackernews.com/2019/05/microsoft-zero-day-vulnerability.html title Update: Hacker Disclosed 4 New Microsoft Zero-Day Exploits in Last 24 Hours
Related news
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0841
- https://www.exploit-db.com/exploits/46683/
- http://packetstormsecurity.com/files/152463/Microsoft-Windows-AppX-Deployment-Service-Privilege-Escalation.html
- https://www.zerodayinitiative.com/advisories/ZDI-19-360/
- http://packetstormsecurity.com/files/153009/Internet-Explorer-JavaScript-Privilege-Escalation.html
- http://packetstormsecurity.com/files/153114/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/153215/Microsoft-Windows-AppX-Deployment-Service-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/153642/AppXSvc-Hard-Link-Privilege-Escalation.html