Vulnerabilities > CVE-2018-0851 - Out-of-bounds Write vulnerability in Microsoft Office, Office Word Viewer and Outlook

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
microsoft
CWE-787
nessus
NVD
Published: 2018-02-15
Updated: 2020-08-24

Summary

Microsoft Office 2007 SP2, Microsoft Office Word Viewer, Microsoft Office 2010 SP2, Microsoft Office 2013 SP1 and RT SP1, Microsoft Office 2016, and Microsoft Office 2016 Click-to-Run (C2R) allow a remote code execution vulnerability, due to how Office handles objects in memory, aka "Microsoft Office Memory Corruption Vulnerability". This CVE is unique from CVE-2018-0852.

Vulnerable Configurations

Part Description Count
Application
Microsoft
8

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS18_FEB_OFFICE.NASL
    descriptionThe Microsoft Office Products are missing security updates. It is, therefore, affected by the following vulnerabilities : - A remote code execution vulnerability exists in Microsoft Office software when the Office 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-2018-0851) - An information disclosure vulnerability exists when Microsoft Office software reads out of bound memory due to an uninitialized variable, which could disclose the contents of memory. An attacker who successfully exploited the vulnerability could view out of bound memory. Exploitation of the vulnerability requires that a user open a specially crafted file with an affected version of Microsoft Office software. The security update addresses the vulnerability by properly initializing the affected variable. (CVE-2018-0853)
    last seen2020-06-01
    modified2020-06-02
    plugin id106805
    published2018-02-13
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106805
    titleSecurity Updates for Microsoft Office Products (February 2018)
    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(106805);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-0851", "CVE-2018-0853");
  script_xref(name:"MSKB", value:"4011715");
  script_xref(name:"MSKB", value:"4011707");
  script_xref(name:"MSKB", value:"3114874");
  script_xref(name:"MSKB", value:"4011690");
  script_xref(name:"MSKB", value:"3172459");
  script_xref(name:"MSKB", value:"4011686");
  script_xref(name:"MSKB", value:"4011143");
  script_xref(name:"MSFT", value:"MS18-4011715");
  script_xref(name:"MSFT", value:"MS18-4011707");
  script_xref(name:"MSFT", value:"MS18-3114874");
  script_xref(name:"MSFT", value:"MS18-4011690");
  script_xref(name:"MSFT", value:"MS18-3172459");
  script_xref(name:"MSFT", value:"MS18-4011686");
  script_xref(name:"MSFT", value:"MS18-4011143");
  script_xref(name:"IAVA", value:"2018-A-0051");

  script_name(english:"Security Updates for Microsoft Office Products (February 2018)");
  script_summary(english:"Checks for Microsoft security updates.");

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

  - A remote code execution vulnerability exists in
    Microsoft Office software when the Office 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-2018-0851)

  - An information disclosure vulnerability exists when
    Microsoft Office software reads out of bound memory due
    to an uninitialized variable, which could disclose the
    contents of memory. An attacker who successfully
    exploited the vulnerability could view out of bound
    memory. Exploitation of the vulnerability requires that
    a user open a specially crafted file with an affected
    version of Microsoft Office software. The security
    update addresses the vulnerability by properly
    initializing the affected variable. (CVE-2018-0853)");
  # https://support.microsoft.com/en-us/help/4011715/descriptionofthesecurityupdatefor2007microsoftofficesuitefebruary13-20
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d7092ec1");
  # https://support.microsoft.com/en-us/help/4011707/descriptionofthesecurityupdateforoffice2010february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?25ea79c7");
  # https://support.microsoft.com/en-us/help/3114874/descriptionofthesecurityupdateforoffice2010february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7216394c");
  # https://support.microsoft.com/en-us/help/4011690/descriptionofthesecurityupdateforoffice2013february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?eec18988");
  # https://support.microsoft.com/en-us/help/3172459/descriptionofthesecurityupdateforoffice2013february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c68f10e8");
  # https://support.microsoft.com/en-us/help/4011686/descriptionofthesecurityupdateforoffice2016february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2d37ad2f");
  # https://support.microsoft.com/en-us/help/4011143/descriptionofthesecurityupdateforoffice2016february13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0bc5ff1d");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4011715
  -KB4011707
  -KB3114874
  -KB4011690
  -KB3172459
  -KB4011686
  -KB4011143");
  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: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-2018-0851");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/13");

  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) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "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");

global_var vuln;

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS18-02";
kbs = make_list(
  '4011715', # Office 2007 SP3
  '4011707', # Office 2010 SP2
  '3114874', # Office 2010 SP2
  '4011690', # Office 2013 SP1
  '3172459', # Office 2013 SP1
  '4011686', # Office 2016
  '4011143'  # 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 2007, 2010, 2013, 2016
######################################################################
function perform_office_checks()
{
  local_var office_vers, office_sp, common_path, path, prod, file, kb, c2r_file;
  office_vers = hotfix_check_office_version();

  ####################################################################
  # Office 2007 SP3 Checks
  ####################################################################
  if (office_vers["12.0"])
  {
    office_sp = get_kb_item("SMB/Office/2007/SP");
    if (!isnull(office_sp) && office_sp == 3)
    {
      prod = "Microsoft Office 2007 SP3";
      common_path = hotfix_get_officecommonfilesdir(officever:"12.0");

      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\Office12"
      );
      if (hotfix_check_fversion(file:"mso.dll", version:"12.0.6785.5000", path:path, kb:"4011715", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }

  ####################################################################
  # Office 2010 SP2 Checks
  ####################################################################
  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";

      common_path = hotfix_get_officecommonfilesdir(officever:"14.0");
      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\Office14"
      );
      if (hotfix_check_fversion(file:"mso.dll", version:"14.0.7194.5000", path:path, kb:"4011707", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"acecore.dll", version:"14.0.7194.5000", path:path, kb:"3114874", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }

  ####################################################################
  # Office 2013 SP1 Checks
  ####################################################################
  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";
      common_path = hotfix_get_officecommonfilesdir(officever:"15.0");

      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\Office15"
      );
      if (hotfix_check_fversion(file:"mso.dll", version:"15.0.5007.1000", path:path, kb:"4011690", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"acecore.dll", version:"15.0.5007.1000", path:path, kb:"3172459", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }

  ####################################################################
  # Office 2016 Checks
  ####################################################################
  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";
      common_path = hotfix_get_officecommonfilesdir(officever:"16.0");

      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\OFFICE16"
      );

      file = "mso.dll";
      kb = "4011686";
      if (
        hotfix_check_fversion(file:file, version:"16.0.4654.1000", channel:"MSI", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8201.2258", channel:"Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8431.2215", channel:"Deferred", channel_version:"1708", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8431.2215", channel:"First Release for Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.9001.2171", channel:"Current", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
        )
        vuln = TRUE;

      file = "acecore.dll";
      kb = "4011143";
      if (
        hotfix_check_fversion(file:file, version:"16.0.4654.1000", channel:"MSI", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8201.2258", channel:"Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8431.2215", channel:"Deferred", channel_version:"1708", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8431.2215", channel:"First Release for Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.9001.2171", channel:"Current", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
        )
        vuln = TRUE;
    }
  }
}

######################################################################
# MAIN
######################################################################
perform_office_checks();

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_MS18_FEB_WORD_VIEWER.NASL
    descriptionThe Microsoft Word Viewer 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 in Microsoft Office software when the Office 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-2018-0851)
    last seen2020-06-01
    modified2020-06-02
    plugin id106817
    published2018-02-14
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106817
    titleSecurity Updates for Microsoft Word Viewer (February 2018)
    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(106817);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-0851");
  script_bugtraq_id(102870);
  script_xref(name:"MSKB", value:"4011703");
  script_xref(name:"MSFT", value:"MS18-4011703");
  script_xref(name:"IAVA", value:"2018-A-0051");

  script_name(english:"Security Updates for Microsoft Word Viewer (February 2018)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Viewer application installed on the remote 
host missing a security update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Viewer 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 in
    Microsoft Office software when the Office 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-2018-0851)");
  # https://support.microsoft.com/en-us/help/4011703/descriptionofthesecurityupdateforwordviewerfebruary13-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?adbc8328");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released KB4011703 to address this issue.");
  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: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-2018-0851");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/02/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/02/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/02/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word_viewer");
  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) 2018-2019 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");

global_var vuln;

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS18-02";
kbs = make_list(
  '4011703'  # Office Word Viewer
);

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();
prod = "Microsoft Word Viewer";

var install, installs, path;
installs = get_kb_list("SMB/Office/WordViewer/*/ProductPath");
foreach install (keys(installs))
{
common_path = installs[install];
common_path = ereg_replace(pattern:"^([A-Za-z]:.*)\\Microsoft Office.*", replace:"\1\Common Files", string:common_path);

path = hotfix_append_path(
  path  : common_path,
  value : "Microsoft Shared\Office11"
);

if (hotfix_check_fversion(file:"mso.dll", version:"11.0.8447.0", path:path, kb:"4011703", product:prod) == 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