Vulnerabilities > CVE-2020-0760 - Improper Input Validation vulnerability in Microsoft products

047910
CVSS 6.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
PARTIAL
network
microsoft
CWE-20
nessus
NVD
Published: 2020-04-15
Updated: 2021-07-21

Summary

A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries, aka 'Microsoft Office Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0991.

Vulnerable Configurations

Part Description Count
Application
Microsoft
33

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_WORD.NASL
    descriptionThe Microsoft Word Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760) - A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. (CVE-2020-0980)
    last seen2020-06-13
    modified2020-04-14
    plugin id135482
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135482
    titleSecurity Updates for Microsoft Word Products (April 2020)
    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(135482);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");

  script_cve_id("CVE-2020-0760", "CVE-2020-0980");
  script_xref(name:"MSKB", value:"4484300");
  script_xref(name:"MSKB", value:"4484319");
  script_xref(name:"MSKB", value:"4484295");
  script_xref(name:"MSFT", value:"MS20-4484300");
  script_xref(name:"MSFT", value:"MS20-4484319");
  script_xref(name:"MSFT", value:"MS20-4484295");
  script_xref(name:"IAVA", value:"2020-A-0149-S");

  script_name(english:"Security Updates for Microsoft Word Products (April 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products are missing security updates. It
is, therefore, affected by multiple vulnerabilities :

  - A remote code execution vulnerability exists when
    Microsoft Office improperly loads arbitrary type
    libraries. An attacker could then install programs;
    view, change, or delete data; or create new accounts
    with full user rights. Users whose accounts are
    configured to have fewer user rights on the system could
    be less impacted than users who operate with
    administrative user rights.  (CVE-2020-0760)

  - A remote code execution vulnerability exists in
    Microsoft Word software when it fails to properly handle
    objects in memory. An attacker who successfully
    exploited the vulnerability could use a specially
    crafted file to perform actions in the security context
    of the current user. For example, the file could then
    take actions on behalf of the logged-on user with the
    same permissions as the current user.  (CVE-2020-0980)");
  # https://support.microsoft.com/en-us/help/4484300/security-update-for-word-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f9c0624");
  # https://support.microsoft.com/en-us/help/4484319/security-update-for-word-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9de3bc71");
  # https://support.microsoft.com/en-us/help/4484295/security-update-for-word-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?88f16861");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484300
  -KB4484319
  -KB4484295

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic
updates are enabled or open any office app and manually perform an
update.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0980");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.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_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');

global_var vuln;

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-04';
kbs = make_list(
  '4484300',
  '4484319',
  '4484295'
);

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', exit_code:1);
port = kb_smb_transport();

checks = make_array(
  '14.0', make_array('sp', 2, 'version', '14.0.7248.5000', 'kb', '4484295'),
  '15.0', make_array('sp', 1, 'version', '15.0.5233.1000', 'kb', '4484319'),
  '16.0', make_nested_list(
    make_array('sp', 0, 'version', '16.0.4993.1001', 'channel', 'MSI', 'kb', '4484300'),
    # C2R
    make_array('version', '16.0.11328.20564', 'channel', 'Deferred'),
    make_array('version', '16.0.11929.20708', 'channel', 'Deferred', 'channel_version', '1908'),
    make_array('version', '16.0.12527.20442', 'channel', 'First Release for Deferred'),
    make_array('version', '16.0.12624.20442', 'channel', 'Current'),
    # 2019
    make_array('version', '16.0.12624.20442', 'channel', '2019 Retail'),
    make_array('version', '16.0.10358.20061', 'channel', '2019 Volume')
    )
  );

if (hotfix_check_office_product(product:'Word', checks:checks, bulletin:bulletin))
{
  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, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_OFFICE.NASL
    descriptionThe Microsoft Office Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760) - A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. (CVE-2020-0980) - A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker 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-2020-0991) - A remote code execution vulnerability exists when the Microsoft Office Access Connectivity 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 Microsoft Office Access Connectivity Engine handles objects in memory. (CVE-2020-0961) - A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker 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-2020-0906, CVE-2020-0979)
    last seen2020-04-18
    modified2020-04-14
    plugin id135476
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135476
    titleSecurity Updates for Microsoft Office Products (April 2020)
    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(135476);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/17");

  script_cve_id(
    "CVE-2020-0760",
    "CVE-2020-0906",
    "CVE-2020-0961",
    "CVE-2020-0979",
    "CVE-2020-0980",
    "CVE-2020-0991"
  );
  script_xref(name:"MSKB", value:"3128012");
  script_xref(name:"MSKB", value:"3203462");
  script_xref(name:"MSKB", value:"4011104");
  script_xref(name:"MSKB", value:"4484117");
  script_xref(name:"MSKB", value:"4484126");
  script_xref(name:"MSKB", value:"4484214");
  script_xref(name:"MSKB", value:"4484229");
  script_xref(name:"MSKB", value:"4484238");
  script_xref(name:"MSKB", value:"4484258");
  script_xref(name:"MSKB", value:"4484260");
  script_xref(name:"MSKB", value:"4484266");
  script_xref(name:"MSKB", value:"4484287");
  script_xref(name:"MSKB", value:"4484294");
  script_xref(name:"MSFT", value:"MS20-3128012");
  script_xref(name:"MSFT", value:"MS20-3203462");
  script_xref(name:"MSFT", value:"MS20-4011104");
  script_xref(name:"MSFT", value:"MS20-4484117");
  script_xref(name:"MSFT", value:"MS20-4484126");
  script_xref(name:"MSFT", value:"MS20-4484214");
  script_xref(name:"MSFT", value:"MS20-4484229");
  script_xref(name:"MSFT", value:"MS20-4484238");
  script_xref(name:"MSFT", value:"MS20-4484258");
  script_xref(name:"MSFT", value:"MS20-4484260");
  script_xref(name:"MSFT", value:"MS20-4484266");
  script_xref(name:"MSFT", value:"MS20-4484287");
  script_xref(name:"MSFT", value:"MS20-4484294");
  script_xref(name:"IAVA", value:"2020-A-0142");

  script_name(english:"Security Updates for Microsoft Office Products (April 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Products are missing security updates.
It is, therefore, affected by multiple vulnerabilities :

  - A remote code execution vulnerability exists when
    Microsoft Office improperly loads arbitrary type
    libraries. An attacker could then install programs;
    view, change, or delete data; or create new accounts
    with full user rights. Users whose accounts are
    configured to have fewer user rights on the system could
    be less impacted than users who operate with
    administrative user rights.  (CVE-2020-0760)

  - A remote code execution vulnerability exists in
    Microsoft Word software when it fails to properly handle
    objects in memory. An attacker who successfully
    exploited the vulnerability could use a specially
    crafted file to perform actions in the security context
    of the current user. For example, the file could then
    take actions on behalf of the logged-on user with the
    same permissions as the current user.  (CVE-2020-0980)

  - A remote code execution vulnerability exists in
    Microsoft Office software when the software fails to
    properly handle objects in memory. An attacker who
    successfully exploited the vulnerability could run
    arbitrary code in the context of the current user. If
    the current user is logged on with administrative user
    rights, an attacker 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-2020-0991)

  - A remote code execution vulnerability exists when the
    Microsoft Office Access Connectivity 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 Microsoft Office Access
    Connectivity Engine handles objects in memory.
    (CVE-2020-0961)

  - A remote code execution vulnerability exists in
    Microsoft Excel software when the software fails to
    properly handle objects in memory. An attacker who
    successfully exploited the vulnerability could run
    arbitrary code in the context of the current user. If
    the current user is logged on with administrative user
    rights, an attacker 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-2020-0906, CVE-2020-0979)");
  # https://support.microsoft.com/en-us/help/3128012/security-update-for-office-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c6907f9f");
  # https://support.microsoft.com/en-us/help/4484214/security-update-for-office-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?22455c7d");
  # https://support.microsoft.com/en-us/help/4484260/security-update-for-office-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6758cebc");
  # https://support.microsoft.com/en-us/help/4484266/security-update-for-office-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?19ff4b0c");
  # https://support.microsoft.com/en-us/help/4484287/security-update-for-office-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?acbb3d03");
  # https://support.microsoft.com/en-us/help/4484294/security-update-for-office-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5e18eb45");
  # https://support.microsoft.com/en-us/help/3203462/security-update-for-office-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?87117772");
  # https://support.microsoft.com/en-us/help/4484258/security-update-for-office-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cc8824f1");
  # https://support.microsoft.com/en-us/help/4484126/security-update-for-office-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a0a366b9");
  # https://support.microsoft.com/en-us/help/4011104/security-update-for-office-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ee0e9939");
  # https://support.microsoft.com/en-us/help/4484117/security-update-for-office-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?318ce33a");
  # https://support.microsoft.com/en-us/help/4484238/security-update-for-office-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?872a2ed0");
  # https://support.microsoft.com/en-us/help/4484229/security-update-for-office-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?67e5e2db");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released security updates for Microsoft Office Products.

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic
updates are enabled or open any office app and manually perform an
update.");
  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:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0760");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.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('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-04';
kbs = make_list(
  '3203462', # Office 2010 SP2
  '4484126', # Office 2010 SP2
  '4484238', # Office 2010 SP2
  '4484266', # Office 2010 SP2
  '4484294', # Office 2010 SP2
  '4011104', # Office 2013 SP1
  '4484117', # Office 2013 SP1
  '4484229', # Office 2013 SP1
  '4484260', # Office 2013 SP1
  '3128012', # Office 2016
  '4484214', # Office 2016
  '4484287', # Office 2016
  '4484258'  # Office 2016
);

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', exit_code:1);

vuln = FALSE;
port = kb_smb_transport();

office_vers = hotfix_check_office_version();

# Office 2010 SP2
if (office_vers['14.0'])
{
  office_sp = get_kb_item('SMB/Office/2010/SP');
  if (!isnull(office_sp) && office_sp == 2)
  {
    prod = 'Microsoft Office 2010 SP2';

    path = hotfix_get_officecommonfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\VBA\\VBA7');
    kb = '3203462';
    file = 'vbe7.dll';
    version = '7.0.16.45';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE14');
    kb = '4484126';
    file = 'mso.dll';
    version = '14.0.7248.5000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE14');
    kb = '4484238';
    file = 'acecore.dll';
    version = '14.0.7248.5000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officeprogramfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\Office14');
    kb = '4484266';
    file = 'graph.exe';
    version = '14.0.7248.5000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    # wwlibcxm.dll only exists if KB2428677 is installed
    path = hotfix_get_officeprogramfilesdir(officever:'14.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\Office14');
    kb = '4484294';
    file = 'wwlibcxm.dll';
    version = '14.0.7248.5000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

  }
}

# Office 2013 SP1
if (office_vers['15.0'])
{
  office_sp = get_kb_item('SMB/Office/2013/SP');
  if (!isnull(office_sp) && office_sp == 1)
  {
    prod = 'Microsoft Office 2013 SP1';

    path = hotfix_get_officecommonfilesdir(officever:'15.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\VBA\\VBA7.1');
    kb = '4011104';
    file = 'vbe7.dll';
    version = '7.1.10.96';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER )
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'15.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE15');
    kb = '4484117';
    file = 'mso.dll';
    version = '15.0.5233.1000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER )
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'15.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE15');
    kb = '4484229';
    file = 'acecore.dll';
    version = '15.0.5233.1000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER )
      vuln = TRUE;

    path = hotfix_get_officeprogramfilesdir(officever:'15.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\Office15');
    kb = '4484260';
    file = 'graph.exe';
    version = '15.0.5233.1000';
    if (hotfix_check_fversion(file:file, version:version, path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER )
      vuln = TRUE;
  }
}

# Office 2016 / 2019 / C2R
if (office_vers['16.0'])
{
  office_sp = get_kb_item('SMB/Office/2016/SP');
  if (!isnull(office_sp) && office_sp == 0)
  {
    prod = 'Microsoft Office 2016';

    path = hotfix_get_officecommonfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\VBA\\VBA7.1');
    kb = '3128012';
    file = 'vbe7.dll';
    version = '7.1.10.96';
    if (hotfix_check_fversion(file:file, version:version, channel:'MSI', channel_product:'Office', path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE16');
    kb = '4484214';
    file = 'mso.dll';
    version = '16.0.4993.1002';
    if (hotfix_check_fversion(file:file, version:version, channel:'MSI', channel_product:'Office', path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officecommonfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Shared\\OFFICE16');
    kb = '4484287';
    file = 'acecore.dll';
    version = '16.0.4993.1000';
    if (hotfix_check_fversion(file:file, version:version, channel:'MSI', channel_product:'Office', path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_get_officeprogramfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\Office16');
    kb = '4484258';
    file = 'graph.exe';
    version = '16.0.4993.1000';
    if (hotfix_check_fversion(file:file, version:version, channel:'MSI', channel_product:'Office', path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
      vuln = TRUE;

    prod2019 = 'Microsoft Office 2019';
    path = hotfix_get_officeprogramfilesdir(officever:'16.0');
    path = hotfix_append_path(path:path, value:'Microsoft Office\\root\\Office16');
    if (
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11328.20564', channel:'Deferred', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11929.20708', channel:'Deferred', channel_version:'1908', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12527.20442', channel:'First Release for Deferred', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12624.20442', channel:'Current', channel_product:'Office', path:path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      # 2019
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12624.20442', channel:'2019 Retail', channel_product:'Office', path:path, bulletin:bulletin, product:prod2019) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.10358.20061', channel:'2019 Volume', channel_product:'Office', path:path, bulletin:bulletin, product:prod2019) == HCF_OLDER
    )
    vuln = TRUE;
  }
}

if (vuln)
{
  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, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_OFFICE_PROJECT.NASL
    descriptionThe Microsoft Project installation on the remote host is missing a security update. Therefore, a remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
    last seen2020-04-23
    modified2020-04-14
    plugin id135477
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135477
    titleMicrosoft Project RCE Vulnerability (April 2020)
    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(135477);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/21");

  script_cve_id("CVE-2020-0760");
  script_xref(name:"MSKB", value:"4484125");
  script_xref(name:"MSKB", value:"4484269");
  script_xref(name:"MSKB", value:"4484132");
  script_xref(name:"MSFT", value:"MS20-4484125");
  script_xref(name:"MSFT", value:"MS20-4484269");
  script_xref(name:"MSFT", value:"MS20-4484132");
  script_xref(name:"IAVA", value:"2020-A-0146");

  script_name(english:"Microsoft Project RCE Vulnerability (April 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Project installation on the remote host is missing the April 2020 security Update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Project installation on the remote host is missing a security update. Therefore, 
a remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. 
An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. 
Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who 
operate with administrative user rights.");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484125");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484132");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484269");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484125
  -KB4484269
  -KB4484132");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0760");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:project_server");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "office_installed.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_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('misc_func.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
bulletin = 'MS20-04';

kbs = make_list(
  '4484132', # 2010
  '4484125', # 2013
  '4484269'  # 2016
);

if (get_kb_item('Host/patch_management_checks'))
  hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);

get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);

port = kb_smb_transport();

project_checks = make_array(
  "14.0", make_array('sp', 2, 'version', "14.0.7246.5000", 'kb', '4484132'),
  "15.0", make_array('sp', 1, 'version', "15.0.5223.1000", 'kb', '4484125'),
  "16.0", make_nested_list(
    make_array('version', "16.0.4993.1001", 'channel', 'MSI', 'kb', '4484269')
    )
  );

if (hotfix_check_office_product(product:'Project', checks:project_checks, bulletin:bulletin))
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_VISIO.NASL
    descriptionThe Microsoft Visio Products are missing a security update. It is, therefore, affected by a remote code execution vulnerability. The vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
    last seen2020-04-23
    modified2020-04-14
    plugin id135480
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135480
    titleSecurity Updates for Microsoft Visio Products (April 2020)
    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(135480);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/21");

  script_cve_id("CVE-2020-0760");
  script_xref(name:"MSKB", value:"4462225");
  script_xref(name:"MSKB", value:"4464544");
  script_xref(name:"MSKB", value:"4484244");
  script_xref(name:"MSFT", value:"MS20-4462225");
  script_xref(name:"MSFT", value:"MS20-4464544");
  script_xref(name:"MSFT", value:"MS20-4484244");

  script_name(english:"Security Updates for Microsoft Visio Products (April 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Visio Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Visio Products are missing a security update. It is, therefore, affected by a remote code execution
vulnerability. The vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker
could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose
accounts are configured to have fewer user rights on the system could be less impacted than users who operate with
administrative user rights.");
  # https://support.microsoft.com/en-us/help/4462225/security-update-for-visio-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f12154af");
  # https://support.microsoft.com/en-us/help/4464544/security-update-for-visio-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b0f860bd");
  # https://support.microsoft.com/en-us/help/4484244/security-update-for-visio-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d44cadfa");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4462225
  -KB4464544
  -KB4484244

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic updates are enabled or open any office app and
manually perform an update.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0760");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:visio");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl", "microsoft_visio_installed.nbin");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-04';
kbs = make_list(
  '4462225',  # Visio 2010
  '4464544',  # Visio 2013
  '4484244'   # Visio 2016
);

if (get_kb_item('Host/patch_management_checks'))
  hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);

get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);

vuln = FALSE;
port = kb_smb_transport();

checks = make_array(
  '14.0', make_array('sp', 2, 'version', '14.0.7248.5000', 'kb', '4462225'),
  '15.0', make_array('sp', 1, 'version', '15.0.5233.1000', 'kb', '4464544'),
  '16.0', make_nested_list(
    make_array('sp', 0, 'version', '16.0.4993.1001', 'channel', 'MSI', 'kb', '4484244'),
    # C2R
    make_array('version', '16.0.11328.20564', 'channel', 'Deferred'),
    make_array('version', '16.0.11929.20708', 'channel', 'Deferred', 'channel_version', '1908'),
    make_array('version', '16.0.12527.20442', 'channel', 'First Release for Deferred'),
    make_array('version', '16.0.12624.20442', 'channel', 'Current'),
    # 2019
    make_array('version', '16.0.12624.20442', 'channel', '2019 Retail'),
    make_array('version', '16.0.10358.20061', 'channel', '2019 Volume')
  )
);

if (hotfix_check_office_product(product:'Visio', checks:checks, bulletin:bulletin))
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_ACCESS.NASL
    descriptionThe Microsoft Access Products are missing a security update. It is, therefore, affected by the following vulnerability : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760)
    last seen2020-04-30
    modified2020-04-14
    plugin id135473
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135473
    titleSecurity Updates for Microsoft Access Products (April 2020)
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_PUBLISHER.NASL
    descriptionThe Microsoft Publisher Products are missing a security update. It is, therefore, affected by the following vulnerability : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760)
    last seen2020-04-30
    modified2020-04-14
    plugin id135462
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135462
    titleSecurity Updates for Microsoft Publisher Products (April 2020)
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_POWERPOINT.NASL
    descriptionThe Microsoft PowerPoint Products are missing a security update. It is, therefore, affected by the following vulnerability : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760)
    last seen2020-04-23
    modified2020-04-14
    plugin id135479
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135479
    titleSecurity Updates for Microsoft PowerPoint Products (April 2020)
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_EXCEL.NASL
    descriptionThe Microsoft Excel Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760) - A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker 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-2020-0906)
    last seen2020-05-08
    modified2020-04-14
    plugin id135474
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135474
    titleSecurity Updates for Microsoft Excel Products (April 2020)
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_APR_OUTLOOK.NASL
    descriptionThe Microsoft Outlook application installed on the remote host is missing a security update. It is, therefore, affected by the following vulnerability : - A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760)
    last seen2020-04-23
    modified2020-04-14
    plugin id135478
    published2020-04-14
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/135478
    titleSecurity Updates for Outlook (April 2020)

References