Vulnerabilities > CVE-2020-0850 - Improper Restriction of Operations within the Bounds of a Memory Buffer 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-119
nessus
NVD
Published: 2020-03-12
Updated: 2021-07-21

Summary

A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory, aka 'Microsoft Word Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0851, CVE-2020-0852, CVE-2020-0855, CVE-2020-0892.

Vulnerable Configurations

Part Description Count
Application
Microsoft
12

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.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_MS20_MAR_OFFICE.NASL
    descriptionThe Microsoft Office application installed on the remote macOS or Mac OS X host is missing a security update. It is, therefore, affected by multiple remote code execution vulnerabilities in Microsoft Word software due to failure to properly handle objects in memory. An attacker could use a specially crafted file to perform actions in the security context of the current user. To exploit this issue, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file.
    last seen2020-04-18
    modified2020-03-11
    plugin id134408
    published2020-03-11
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134408
    titleSecurity Updates for Microsoft Office Products (March 2020) (macOS)
    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(134408);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/17");

  script_cve_id(
    "CVE-2020-0850",
    "CVE-2020-0851",
    "CVE-2020-0852",
    "CVE-2020-0855",
    "CVE-2020-0892"
  );

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

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office application installed on the remote macOS or Mac OS X host is missing a security update. It is,
therefore, affected by multiple remote code execution vulnerabilities in Microsoft Word software due to failure to
properly handle objects in memory. An attacker could use a specially crafted file to perform actions in the security 
context of the current user. To exploit this issue, an attacker would have to convince the user to click a link, 
typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the 
specially crafted file.");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-for-mac#march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?267d9c1d");
  # https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac#march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?07e51711");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-2016-mac#march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?64424563");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office for Mac.");
  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-2020-0892");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:powerpoint");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:outlook");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:onenote");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

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

  script_dependencies("macosx_office_installed.nbin");
  script_require_keys("Host/MacOSX/Version");
  script_require_ports("installed_sw/Microsoft Word", "installed_sw/Microsoft Excel", "installed_sw/Microsoft PowerPoint", "installed_sw/Microsoft OneNote", "installed_sw/Microsoft Outlook");

  exit(0);
}

include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('install_func.inc');

os = get_kb_item_or_exit('Host/MacOSX/Version');
apps = make_list(
  'Microsoft Word',
  'Microsoft Excel',
  'Microsoft PowerPoint',
  'Microsoft OneNote',
  'Microsoft Outlook'
);
report = '';

#2016
min_ver_16 = '16';
fix_ver_16 = '16.16.20';
fix_disp_16 = '16.16.20 (20030700)';

#2019
min_ver_19 = '16.17.0';
fix_ver_19 = '16.35';
fix_disp_19 = '16.35 (20030802)';

foreach app (apps)
{
  installs = get_installs(app_name:app);
  if (isnull(installs[1]))
    continue;

  foreach install (installs[1])
  {
    version = install['version'];

    if (ver_compare(ver:version, minver:min_ver_19, fix:fix_ver_19, strict:FALSE) < 0)
    {
      app_label = app + ' for Mac 2019';
      report +=
        '\n\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp_19;
    }
    else if (ver_compare(ver:version, minver:min_ver_16, fix:fix_ver_16, strict:FALSE) < 0)
    {
      app_label = app + ' for Mac 2016';
      report +=
        '\n\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp_16;
    }
  }
}
if (empty(report))
  audit(AUDIT_HOST_NOT, 'affected');

if (os =~ "^Mac OS X 10\.[0-9](\.|$)")
  report += '\n  Note              : Update will require Mac OS X 10.10.0 or later.\n';

security_report_v4(severity:SECURITY_HOLE, port:0, extra:report);
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS20_MAR_WORD.NASL
    descriptionThe Microsoft Word Products are missing security updates. It is, therefore, affected by affected by the following vulnerability: - 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. To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Word software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file. (CVE-2020-0850, CVE-2020-0892)
    last seen2020-04-18
    modified2020-03-10
    plugin id134382
    published2020-03-10
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134382
    titleSecurity Updates for Microsoft Word Products (March 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(134382);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/17");

  script_cve_id("CVE-2020-0850", "CVE-2020-0892");
  script_xref(name:"MSKB", value:"4484268");
  script_xref(name:"MSKB", value:"4484240");
  script_xref(name:"MSKB", value:"4484231");
  script_xref(name:"MSFT", value:"MS20-4484268");
  script_xref(name:"MSFT", value:"MS20-4484240");
  script_xref(name:"MSFT", value:"MS20-4484231");

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

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are affected by a Remote Code Execution Vulnerability. (CVE-2020-0850, CVE-2020-0892)");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products are missing security updates.
It is, therefore, affected by affected by the following vulnerability:

  - 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.

    To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Word 
    software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted
    file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a
    website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially 
    crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the 
    user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way 
    of an enticement in an email or Instant Messenger message, and then convince the user to open the specially 
    crafted file. (CVE-2020-0850, CVE-2020-0892)");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484268");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484240");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484231");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484268
  -KB4484240
  -KB4484231

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic
updates are enabled or open Word 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-2020-0892");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  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 = 'MS20-03';
kbs = make_list(
  '4484268',
  '4484240',
  '4484231'
);

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', '14.0.7246.5000', 'kb', '4484240'),
  '15.0', make_array('sp', 1, 'version', '15.0.5223.1000', 'kb', '4484231'),
  '16.0', make_nested_list(
    make_array('sp', 0, 'version', '16.0.4978.1000', 'channel', 'MSI', 'kb', '4484268'),
    # C2R
    make_array('version', '16.0.11328.20554', 'channel', 'Deferred'),
    make_array('version', '16.0.11929.20648', 'channel', 'Deferred', 'channel_version', '1908'),
    make_array('version', '16.0.12527.20278', 'channel', 'First Release for Deferred'),
    make_array('version', '16.0.12527.20278', 'channel', 'Current'),
    # 2019
    make_array('version', '16.0.12527.20278', 'channel', '2019 Retail'),
    make_array('version', '16.0.10357.20081', '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_MAR_OFFICE_SHAREPOINT.NASL
    descriptionThe Microsoft SharePoint Server installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities : - This vulnerability is caused when SharePoint Server does not properly sanitize a specially crafted request to an affected SharePoint server. An authenticated attacker could exploit this vulnerability by sending a specially crafted request to an affected SharePoint server. The attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim
    last seen2020-06-02
    modified2020-03-10
    plugin id134378
    published2020-03-10
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134378
    titleSecurity Updates for Microsoft SharePoint Server (March 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(134378);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/02");

  script_cve_id(
    "CVE-2020-0795",
    "CVE-2020-0850",
    "CVE-2020-0852",
    "CVE-2020-0891",
    "CVE-2020-0892",
    "CVE-2020-0893",
    "CVE-2020-0894"
  );
  script_xref(name:"MSKB", value:"4484150");
  script_xref(name:"MSKB", value:"4484272");
  script_xref(name:"MSKB", value:"4484282");
  script_xref(name:"MSKB", value:"4484275");
  script_xref(name:"MSKB", value:"4484271");
  script_xref(name:"MSKB", value:"4484197");
  script_xref(name:"MSKB", value:"4484277");
  script_xref(name:"MSKB", value:"4484124");
  script_xref(name:"MSKB", value:"4475606");
  script_xref(name:"MSKB", value:"4475597");
  script_xref(name:"MSFT", value:"MS20-4484150");
  script_xref(name:"MSFT", value:"MS20-4484272");
  script_xref(name:"MSFT", value:"MS20-4484282");
  script_xref(name:"MSFT", value:"MS20-4484275");
  script_xref(name:"MSFT", value:"MS20-4484271");
  script_xref(name:"MSFT", value:"MS20-4484197");
  script_xref(name:"MSFT", value:"MS20-4484277");
  script_xref(name:"MSFT", value:"MS20-4484124");
  script_xref(name:"MSFT", value:"MS20-4475606");
  script_xref(name:"MSFT", value:"MS20-4475597");

  script_name(english:"Security Updates for Microsoft SharePoint Server (March 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft SharePoint Server installation on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft SharePoint Server installation on the remote
host is missing security updates. It is, therefore, affected
by multiple vulnerabilities :

  - This vulnerability is caused when SharePoint Server does
    not properly sanitize a specially crafted request to an
    affected SharePoint server. An authenticated attacker
    could exploit this vulnerability by sending a specially
    crafted request to an affected SharePoint server. The
    attacker who successfully exploited this vulnerability
    could then perform cross-site scripting attacks on
    affected systems and run script in the security context
    of the current user. These attacks could allow the
    attacker to read content that the attacker is not
    authorized to read, use the victim's identity to take
    actions on the SharePoint site on behalf of the victim,
    such as change permissions, delete content, steal
    sensitive information (such as browser cookies) and
    inject malicious content in the browser of the victim.
    For this vulnerability to be exploited, a user must
    click a specially crafted URL that takes the user to a
    targeted SharePoint Web App site. In an email attack
    scenario, an attacker could exploit the vulnerability by
    sending an email message containing the specially
    crafted URL to the user of the targeted Sharepoint Web
    App site and convincing the user to click the specially
    crafted URL.  (CVE-2020-0795, CVE-2020-0891)

  - 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-2020-0850,
    CVE-2020-0892)

  - 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-2020-0852)

  - A cross-site-scripting (XSS) vulnerability exists when
    Microsoft SharePoint Server does not properly sanitize a
    specially crafted web request to an affected SharePoint
    server. An authenticated attacker could exploit the
    vulnerability by sending a specially crafted request to
    an affected SharePoint server. The attacker who
    successfully exploited the vulnerability could then
    perform cross-site scripting attacks on affected systems
    and run script in the security context of the current
    user. The attacks could allow the attacker to read
    content that the attacker is not authorized to read, use
    the victim's identity to take actions on the SharePoint
    site on behalf of the user, such as change permissions
    and delete content, and inject malicious content in the
    browser of the user. The security update addresses the
    vulnerability by helping to ensure that SharePoint
    Server properly sanitizes web requests. (CVE-2020-0893,
    CVE-2020-0894)");
  # https://support.microsoft.com/en-us/help/4484150/security-update-for-sharepoint-server-2013-march-10
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eccb4bd2");
  # https://support.microsoft.com/en-us/help/4484272/security-update-for-sharepoint-server-2016-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?94f61ecb");
  # https://support.microsoft.com/en-us/help/4484282/security-update-for-sharepoint-foundation-2013-march-10
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b7300d1c");
  # https://support.microsoft.com/en-us/help/4484275/security-update-for-sharepoint-server-2016-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?82b4cb48");
  # https://support.microsoft.com/en-us/help/4484271/security-update-for-sharepoint-server-2019-march-10
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?81543a06");
  # https://support.microsoft.com/en-us/help/4484197/security-update-for-sharepoint-foundation-2010-march-10
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?edfa5253");
  # https://support.microsoft.com/en-us/help/4484277/security-update-for-sharepoint-server-2019-language-pack
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4c5091a1");
  # https://support.microsoft.com/en-us/help/4484124/security-update-for-sharepoint-foundation-2013-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4448f982");
  # https://support.microsoft.com/en-us/help/4475606/security-update-for-sharepoint-server-2013-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?70c88fde");
  # https://support.microsoft.com/en-us/help/4475597/security-update-for-sharepoint-server-2010-march-10
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3028f961");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released security updates for Microsoft SharePoint Server.");
  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-2020-0892");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint");
  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("microsoft_sharepoint_installed.nbin", "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('misc_func.inc');
include('install_func.inc');
include('lists.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-03';

kbs = make_list(
  '4484197', # 2010 SP2 Foundation
  '4475597', # 2010 SP2 Enterprise
  '4484282', # 2013 SP1 Foundation
  '4484124', # 2013 SP1 Foundation
  '4484150', # 2013 SP1 Enterprise
  '4475606', # 2013 SP1 Enterprise
  '4484272', # 2016 Enterprise
  '4484275', # 2016 Enterprise
  '4484271', # 2019 Core
  '4484277'  # 2019 Language Pack*
);

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);

# Get path information for Windows.
windir = hotfix_get_systemroot();
if (isnull(windir)) exit(1, 'Failed to determine the location of %windir%.');

registry_init();

install = get_single_install(app_name:'Microsoft SharePoint Server');

kb_checks =
{
  '2010':
  { '2':
    {'Foundation':
      [{
         'kb'          : '4484197',
         'path'        : hotfix_get_commonfilesdir(),
         'append'      : 'microsoft shared\\web server extensions\\14\\bin',
         'file'        : 'onetutil.dll',
         'version'     : '14.0.7246.5000',
         'product_name': 'Microsoft SharePoint Foundation Server 2010 SP 2'
      }],
    'Server':
      [{
         'kb'           : '4475597',
         'path'         : install['path'],
         'append'       : 'WebServices\\WordServer\\Core',
         'file'         : 'sword.dll',
         'version'      : '14.0.7246.5000',
         'product_name' : 'Microsoft SharePoint Enterprise Server 2010 SP 2'
      }]
    }
  },
  '2013':
  { '1':
    {'Foundation':
      [{
         'kb'           : '4484282',
         'path'         : hotfix_get_commonfilesdir(),
         'append'       : 'microsoft shared\\web server extensions\\15\\bin',
         'file'         : 'onetutil.dll',
         'version'      : '15.0.5223.1000',
         'product_name' : 'Microsoft SharePoint Foundation Server 2013 SP1'
      },
      {
         'kb'           : '4484124',
         'path'         : hotfix_get_commonfilesdir(),
         'append'       : 'microsoft shared\\server15\\server setup controller',
         'file'         : 'wsssetup.dll',
         'version'      : '15.0.5223.1000',
         'product_name' : 'Microsoft SharePoint Foundation Server 2013 SP1'
      }],
    'Server':
      [{
         'kb'           : '4484150',
         'path'         : install['path'],
         'append'       : 'transformapps',
         'file'         : 'docxpageconverter.exe',
         'version'      : '15.0.5223.1000',
         'product_name' : 'Microsoft SharePoint Enterprise Server 2013 SP1'
      },
      {
         'kb'           : '4475606',
         'path'         : install['path'],
         'append'       : 'WebServices\\ConversionServices',
         'file'         : 'sword.dll',
         'version'      : '15.0.5223.1000',
         'product_name' : 'Microsoft SharePoint Enterprise Server 2013 SP1'
      }]
    }
  },
  '2016':
  { '0':
    {'Server':
      [{
         'kb'           : '4484272',
         'path'         : install['path'],
         'append'       : 'WebServices\\ConversionServices',
         'file'         : 'sword.dll',
         'version'      : '16.0.4978.1000',
         'product_name' : 'Microsoft SharePoint Enterprise Server 2016'
      },
      {
         'kb'           : '4484275',
         'path'         : install['path'],
         'append'       :'bin\\1033',
         'file'         : 'notessetup.exe',
         'version'      : '16.0.4585.1000',
         'product_name' : 'Microsoft SharePoint Enterprise Server 2016'
      }]
    }
  },
  '2019':
  { '0':
    {'Server':
      [{
         'kb'           : '4484271',
         'path'         : install['path'],
         'append'       : 'WebServices\\ConversionServices',
         'file'         : 'sword.dll',
         'version'      : '16.0.10357.20002',
         'product_name' : 'Microsoft SharePoint Server 2019'
      },
      {
         'kb'           : '4484277',
         'path'         : install['path'],
         'append'       :'bin\\1033',
         'file'         : 'notessetup.exe',
         'version'      : '16.0.10358.20000',
         'product_name' : 'Microsoft SharePoint Server 2019'
      }]
    }
  }
};

# Get the specific product / path 
param_list = kb_checks[install['Product']][install['SP']][install['Edition']];

# audit if not affected
if(isnull(param_list)) audit(AUDIT_INST_VER_NOT_VULN, 'Microsoft SharePoint Server');

vuln = FALSE;
xss = FALSE;
port = kb_smb_transport();
reg_keys = get_kb_list('SMB/Registry/HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/*/DisplayName');

# grab the path otherwise
foreach check (param_list)
{
  if (!isnull(check['version']))
  {
    path = hotfix_append_path(path:check['path'], value:check['append']);

    are_we_vuln = hotfix_check_fversion(
      file:check['file'],
      version:check['version'],
      path:path,
      kb:check['kb'],
      product:check['product_name']
    );
  }
  else
  {
    report = '\n';
    if (check['product_name'])
      report += '  Product : ' + check['product_name'] + '\n';
    if (check['kb'])
      report += '  KB : ' + check['kb'] + '\n';
    hotfix_add_report(report, kb:check['kb']);
  }

  if(are_we_vuln == HCF_OLDER)
  {
    vuln = TRUE;
    if (check['kb'] == '4484150' ||
        check['kb'] == '4484271' ||
        check['kb'] == '4484272' ||
        check['kb'] == '4484197' ||
        check['kb'] == '4484282'
    ) xss = TRUE;
  }
}

if (vuln)
{
  port = kb_smb_transport();
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  if (xss) replace_kb_item(name:'www/' + port + '/XSS', 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_MAR_OFFICE.NASL
    descriptionThe Microsoft Office Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - 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-2020-0850, CVE-2020-0851, CVE-2020-0855, CVE-2020-0892) - 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-2020-0852) - Remote code execution vulnerabilities exist in Microsoft products that utilize the FBX library when processing specially crafted 3D content. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the local user. (CVE-2020-7080, CVE-2020-7081, CVE-2020-7082, CVE-2020-7083, CVE-2020-7084, CVE-2020-7085)
    last seen2020-06-04
    modified2020-03-11
    plugin id134416
    published2020-03-11
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134416
    titleSecurity Updates for Microsoft Office Products (March 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(134416);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/03");

  script_cve_id(
    "CVE-2020-0850",
    "CVE-2020-0851",
    "CVE-2020-0852",
    "CVE-2020-0855",
    "CVE-2020-0892",
    "CVE-2020-7080",
    "CVE-2020-7081",
    "CVE-2020-7082",
    "CVE-2020-7083",
    "CVE-2020-7084",
    "CVE-2020-7085"
  );
  script_xref(name:"MSKB", value:"4484237");
  script_xref(name:"MSFT", value:"MS20-4484237");

  script_name(english:"Security Updates for Microsoft Office Products (March 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 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-2020-0850,
    CVE-2020-0851, CVE-2020-0855, CVE-2020-0892)

  - 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-2020-0852)

  - Remote code execution vulnerabilities exist in Microsoft 
    products that utilize the FBX library when processing 
    specially crafted 3D content. An attacker who 
    successfully exploited these vulnerabilities could gain 
    the same user rights as the local user. (CVE-2020-7080, 
    CVE-2020-7081, CVE-2020-7082, CVE-2020-7083, 
    CVE-2020-7084, CVE-2020-7085)");
  # https://support.microsoft.com/en-us/help/4484237/security-update-for-office-2010-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e59db2e7");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB4484237 to address this issue for 
Office 2010. And 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-2020-0892");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  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('misc_func.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-03';
kbs = make_list(
  '4484237'  # Office 2010 SP2 wwlibcxm.dll
);

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';

    # 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 = '4484237';
    file = 'wwlibcxm.dll';
    version = '14.0.7246.5000';
    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';
    prod2019 = 'Microsoft Office 2019';
    path = hotfix_get_officeprogramfilesdir(officever:'16.0');
    graph_exe_path = hotfix_append_path(path:path, value:'Microsoft Office\\root\\Office16');
    c2r_path = graph_exe_path;
    if (
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11328.20554', channel:'Deferred', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.11929.20648', channel:'Deferred', channel_version:'1908', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12527.20278', channel:'First Release for Deferred', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12527.20278', channel:'Current', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod) == HCF_OLDER ||
      # 2019
      hotfix_check_fversion(file:'graph.exe', version:'16.0.12527.20278', channel:'2019 Retail', channel_product:'Office', path:c2r_path, bulletin:bulletin, product:prod2019) == HCF_OLDER ||
      hotfix_check_fversion(file:'graph.exe', version:'16.0.10357.20081', channel:'2019 Volume', channel_product:'Office', path:c2r_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_MAR_OFFICE_WEB.NASL
    descriptionThe Microsoft Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities : - 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-2020-0850, CVE-2020-0892) - 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-2020-0852)
    last seen2020-03-20
    modified2020-03-10
    plugin id134379
    published2020-03-10
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134379
    titleSecurity Updates for Microsoft Office Web Apps (March 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(134379);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/19");

  script_cve_id("CVE-2020-0850", "CVE-2020-0852", "CVE-2020-0892");
  script_xref(name:"MSKB", value:"4484270");
  script_xref(name:"MSKB", value:"4475602");
  script_xref(name:"MSFT", value:"MS20-4484270");
  script_xref(name:"MSFT", value:"MS20-4475602");

  script_name(english:"Security Updates for Microsoft Office Web Apps (March 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Web Apps installation on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office Web Apps installation on the remote
host is missing security updates. It is, therefore, affected
by multiple vulnerabilities :

  - 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-2020-0850,
    CVE-2020-0892)

  - 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-2020-0852)");
  # https://support.microsoft.com/en-us/help/4484270/security-update-for-office-online-server-march-10-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c9e7117b");
  # https://support.microsoft.com/en-us/help/4475602/security-update-for-sharepoint-server-2010-office-web-apps
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?acaea58a");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484270
  -KB4475602");
  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-2020-0892");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_web_apps");
  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", "microsoft_owa_installed.nbin", "microsoft_office_compatibility_pack_installed.nbin", "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('misc_func.inc');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-03';
kbs = make_list(
  '4461633',
  '4475602'
);
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();

# Get installs of Office Web Apps
owa_installs = get_installs(app_name:'Microsoft Office Web Apps');

if (!empty_or_null(owa_installs))
{
  foreach owa_install (owa_installs[1])
  {
    if (owa_install['Product'] == '2010')
    {
      owa_2010_path = owa_install['path'];
      owa_2010_sp = owa_install['SP'];
    }
    else if (owa_install['Product'] == '2016') # Is stored as 2016, yes.
    {
      owa_2019_path = owa_install['path'];
      owa_2019_sp = owa_install['SP'];
    }
  }
}
vuln = FALSE;

####################################################################
# Office Web Apps 2010 SP2
####################################################################
if (owa_2010_path && (!isnull(owa_2010_sp) && owa_2010_sp == '2'))
{
  path = hotfix_append_path(path:owa_2010_path, value:'14.0\\WebServices\\ConversionService\\Bin\\Converter');
  if (hotfix_check_fversion(file:'msoserver.dll', version:'14.0.7246.5000', min_version:'14.0.0.0', path:path, kb:'4475602', product:'Office Web Apps 2010') == HCF_OLDER)
    vuln = TRUE;
}


####################################################################
# Office Online Server
####################################################################
if (owa_2019_path && (!isnull(owa_2019_sp) && owa_2019_sp == '0'))
{
  path = hotfix_append_path(path:owa_2019_path, value:"ExcelServicesEcs\bin");
  if (hotfix_check_fversion(file:'xlsrv.dll', version:'16.0.10357.20002', min_version:'16.0.10000.0', path:path, kb:'4461633', product:'Office Online Server') == 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');
}

References