Vulnerabilities > CVE-2017-11357 - Unrestricted Upload of File with Dangerous Type vulnerability in Telerik UI for Asp.Net Ajax
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Progress Telerik UI for ASP.NET AJAX before R2 2017 SP2 does not properly restrict user input to RadAsyncUpload, which allows remote attackers to perform arbitrary file uploads or execute arbitrary code.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Accessing Functionality Not Properly Constrained by ACLs In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
- Privilege Abuse An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.
Exploit-Db
file | exploits/aspx/webapps/43874.py |
id | EDB-ID:43874 |
last seen | 2018-11-30 |
modified | 2018-01-24 |
platform | aspx |
port | |
published | 2018-01-24 |
reporter | Exploit-DB |
source | https://www.exploit-db.com/download/43874 |
title | Telerik UI for ASP.NET AJAX 2012.3.1308 < 2017.1.118 - Arbitrary File Upload |
type | webapps |
Nessus
NASL family Windows NASL id TELERIK_UI_FOR_ASPNET_AJAX_CVE-2017-11317.NASL description The version of Telerik UI for ASP.NET AJAX installed on the remote Windows host is affected by multiple vulnerabilities in Telerik.Web.UI.dll. An unauthenticated, remote attacker can exploit this, via specially crafted data, to execute arbitrary code. last seen 2020-05-23 modified 2018-03-02 plugin id 107096 published 2018-03-02 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/107096 title Telerik UI for ASP.NET AJAX RadAsyncUpload Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(107096); script_version("1.5"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/22"); script_cve_id("CVE-2017-11317", "CVE-2017-11357"); script_bugtraq_id(103171, 103173); script_xref(name:"IAVA", value:"2018-A-0066-S"); script_name(english:"Telerik UI for ASP.NET AJAX RadAsyncUpload Multiple Vulnerabilities"); script_summary(english:"Checks the version of Telerik.Web.UI.dll."); script_set_attribute(attribute:"synopsis", value: "A web application development suite installed on the remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Telerik UI for ASP.NET AJAX installed on the remote Windows host is affected by multiple vulnerabilities in Telerik.Web.UI.dll. An unauthenticated, remote attacker can exploit this, via specially crafted data, to execute arbitrary code."); # https://www.telerik.com/support/kb/aspnet-ajax/upload-%28async%29/details/insecure-direct-object-reference script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?77b0e65f"); # https://www.telerik.com/support/kb/aspnet-ajax/upload-(async)/details/unrestricted-file-upload script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?49cbdec3"); script_set_attribute(attribute:"solution", value: "Upgrade to Telerik UI for ASP.NET AJAX version R2 2017 SP2 (2017.2.711) or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-11357"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/22"); script_set_attribute(attribute:"patch_publication_date", value:"2017/08/15"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/03/02"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:telerik:ui_for_asp.net_ajax"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("telerik_ui_for_aspnet_ajax_installed.nbin"); script_require_keys("installed_sw/Telerik UI for ASP.NET AJAX"); script_require_ports(139, 445); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); include("install_func.inc"); include("smb_func.inc"); include("smb_hotfixes.inc"); function display_dword (dword, nox) { local_var tmp; if (isnull(nox) || (nox == FALSE)) tmp = "0x"; else tmp = ""; return "" + tmp + toupper(hexstr(raw_string( (dword >>> 24) & 0xFF, (dword >>> 16) & 0xFF, (dword >>> 8) & 0xFF, dword & 0xFF ))); } app_name = "Telerik UI for ASP.NET AJAX"; has_a_patch = FALSE; install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE); version = install['version']; path = install['path']; web_ui_dll = install['web_ui_dll']; # 2017.2.711 and later is patched if (ver_compare(ver:version, fix:"2017.2.711.0", strict:FALSE) >= 0) audit(AUDIT_INST_PATH_NOT_VULN, app_name, version, path); # 2011.1.315 to 2017.2.621 have patches + mitigations available if ((ver_compare(ver:version, fix:"2011.1.315.0", strict:FALSE) >= 0) && (ver_compare(ver:version, fix:"2017.2.621.9999", strict:FALSE) <= 0)) { # check for "Telerik.Web.UI.Patch" in the File Description # Connect to the appropriate share. port = kb_smb_transport(); login = kb_smb_login(); pass = kb_smb_password(); domain = kb_smb_domain(); if (!smb_session_init()) audit(AUDIT_FN_FAIL, "smb_session_init"); share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:web_ui_dll); dll = ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1", string:web_ui_dll); rc = NetUseAdd(login:login, password:pass, domain:domain, share:share); if (rc != 1) { NetUseDel(); audit(AUDIT_SHARE_FAIL, share); } fh = CreateFile( file:dll, desired_access:GENERIC_READ, file_attributes:FILE_ATTRIBUTE_NORMAL, share_mode:FILE_SHARE_READ, create_disposition:OPEN_EXISTING ); file_description = NULL; if (!isnull(fh)) { ret = GetFileVersionEx(handle:fh); if (!isnull(ret)) children = ret['Children']; if (!isnull(children)) { varfileinfo = children['VarFileInfo']; if (!isnull(varfileinfo)) { translation = (get_word (blob:varfileinfo['Translation'], pos:0) << 16) + get_word (blob:varfileinfo['Translation'], pos:2); translation = tolower(display_dword(dword:translation, nox:TRUE)); } stringfileinfo = children['StringFileInfo']; if (!isnull(stringfileinfo) && !isnull(translation)) { data = stringfileinfo[translation]; if (!isnull(data)) file_description = data['FileDescription']; else { data = stringfileinfo[toupper(translation)]; if (!isnull(data)) file_description = data['FileDescription']; } } } CloseFile(handle:fh); } NetUseDel(); if (empty_or_null(file_description)) exit(1, "Failed to get the file description of " + web_ui_dll + "."); if (file_description == "Telerik.Web.UI.Patch") has_a_patch = TRUE; } if (has_a_patch) { # if it has *a* patch, we can't be sure that it is the correct patch # and we also can't tell if they have applied the mitigations to go # with the patch, so if we're paranoid, we add a note to the report # (done below) and if we're not paranoid, we audit out if (report_paranoia < 2) audit(AUDIT_PARANOID); } port = get_kb_item("SMB/transport"); if (empty_or_null(port)) port = 445; report = report_items_str( report_items:make_array( "Path", path, "Installed version", version, "Fixed version", "2017.2.711.0 or vendor supplied patch" ), ordered_fields:make_list("Path", "Installed version", "Fixed version") ); if (has_a_patch) report += '\n\n' + "Although a patch has been applied, we aren't able to determine if this is the" + '\n' + "correct patch for these vulnerabilities. As per the vendor advisory, you must" + '\n' + "ensure that the patch you applied was downloaded after August 15th, 2017. You" + '\n' + "must also ensure the appropriate mitigations (disable file uploads or disable" + '\n' + "POST requests) have been applied as per the vendor advisory"; security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
NASL family Windows NASL id TELERIK_UI_FOR_ASPNET_AJAX_CVE-2019-18935.NASL description Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.) last seen 2020-05-23 modified 2020-04-24 plugin id 135970 published 2020-04-24 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/135970 title Telerik UI for ASP.NET AJAX RadAsyncUpload .NET Deserialization Vulnerability code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(135970); script_version("1.3"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/22"); script_cve_id("CVE-2019-18935"); script_xref(name:"IAVA", value:"2020-A-0219"); script_name(english:"Telerik UI for ASP.NET AJAX RadAsyncUpload .NET Deserialization Vulnerability"); script_set_attribute(attribute:"synopsis", value: "A web application development suite installed on the remote Windows host is affected by a deserialization vulnerability."); script_set_attribute(attribute:"description", value: "Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)"); # https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?de2ce6ef"); # https://docs.telerik.com/devtools/aspnet-ajax/controls/asyncupload/security?&_ga=2.224762457.29387225.1587722153-1707628900.1586272484#allowedcustommetadatatypes script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?be6fd178"); script_set_attribute(attribute:"solution", value: "Upgrade to Telerik UI for ASP.NET AJAX version R3 2019 SP1 (2019.3.1023) or later, and enable the type whitelisting feature of RadAsyncUpload."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P"); 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:N/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-2019-18935"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/09"); script_set_attribute(attribute:"patch_publication_date", value:"2019/12/09"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/24"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:telerik:ui_for_asp.net_ajax"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("telerik_ui_for_aspnet_ajax_installed.nbin"); script_require_keys("installed_sw/Telerik UI for ASP.NET AJAX"); script_require_ports(139, 445); exit(0); } include('install_func.inc'); include('smb_func.inc'); include('smb_hotfixes.inc'); app_name = 'Telerik UI for ASP.NET AJAX'; opt_in = FALSE; install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE); version = install['version']; path = install['path']; # 2020.1.114 and later have default settings available if (ver_compare(ver:version, fix:'2020.1.114.0', strict:FALSE) >= 0) audit(AUDIT_INST_PATH_NOT_VULN, app_name, version, path); # 2019.3.1023 has opt-in settings available, but not by default if ((ver_compare(ver:version, fix:'2019.3.1023', strict:FALSE) >= 0) && (ver_compare(ver:version, fix:'2020.1.114.0', strict:FALSE) <= 0)) { opt_in = TRUE; } if (opt_in) { # if version is 2019.3.1023 or higher, but lower than 2020.1.114.0, # type whitelisting feature of RadAsyncUpload needs to be enabled manually. # so if we're paranoid, we add a note to the report # (done below) and if we're not paranoid, we audit out if (report_paranoia < 2) audit(AUDIT_PARANOID); } port = get_kb_item('SMB/transport'); if (empty_or_null(port)) port = 445; report = report_items_str( report_items:make_array( 'Path', path, 'Installed version', version, 'Fixed version', '2019.3.1023' ), ordered_fields:make_list('Path', 'Installed version', 'Fixed version') ); if (opt_in) report += '\n\n' + 'Although the type whitelisting feature of RadAsyncUpload is available for this version,' + '\n' + 'we are not able to determine if this is actually enabled. Following the advisory,' + '\n' + 'you should ensure that this is the case.'; security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);