Vulnerabilities > CVE-2018-8378 - Out-of-bounds Read vulnerability in Microsoft products

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
microsoft
CWE-125
nessus
NVD
Published: 2018-08-15
Updated: 2020-08-24

Summary

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, aka "Microsoft Office Information Disclosure Vulnerability." This affects Word, Microsoft SharePoint Server, Microsoft Office Word Viewer, Microsoft Excel Viewer, Microsoft SharePoint, Microsoft Office.

Vulnerable Configurations

Part Description Count
Application
Microsoft
15

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS18_AUG_OFFICE_VIEWERS_COMPAT.NASL
    descriptionThe Microsoft Office Viewer / Office Compatibility Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - 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-2018-8375) - An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the users computer or data. (CVE-2018-8382) - 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-2018-8378)
    last seen2020-06-01
    modified2020-06-02
    plugin id111698
    published2018-08-14
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111698
    titleSecurity Updates for Microsoft Office Viewer Products / Office Compatibility Products (August 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(111698);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id("CVE-2018-8375", "CVE-2018-8378", "CVE-2018-8382");
  script_bugtraq_id(104989, 104996, 105000);
  script_xref(name:"MSKB", value:"4032212");
  script_xref(name:"MSKB", value:"4032213");
  script_xref(name:"MSKB", value:"4092433");
  script_xref(name:"MSKB", value:"4022195");
  script_xref(name:"MSKB", value:"4092434");
  script_xref(name:"MSFT", value:"MS18-4032212");
  script_xref(name:"MSFT", value:"MS18-4032213");
  script_xref(name:"MSFT", value:"MS18-4092433");
  script_xref(name:"MSFT", value:"MS18-4022195");
  script_xref(name:"MSFT", value:"MS18-4092434");

  script_name(english:"Security Updates for Microsoft Office Viewer Products / Office Compatibility Products (August 2018)");
  script_summary(english:"Checks for Microsoft security updates.");

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

  - 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-2018-8375)

  - An information disclosure vulnerability exists when
    Microsoft Excel improperly discloses the contents of its
    memory. An attacker who exploited the vulnerability
    could use the information to compromise the users
    computer or data.  (CVE-2018-8382)

  - 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-2018-8378)");
  # https://support.microsoft.com/en-us/help/4032212/description-of-the-security-update-for-microsoft-office-compatibility
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?044626c2");
  # https://support.microsoft.com/en-us/help/4032213/description-of-the-security-update-for-excel-viewer-2007-august-14
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?242a4c69");
  # https://support.microsoft.com/en-us/help/4092433/description-of-the-security-update-for-word-viewer-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ec324acb");
  # https://support.microsoft.com/en-us/help/4022195/description-of-the-security-update-for-microsoft-office-viewers-and-of
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?aa676634");
  # https://support.microsoft.com/en-us/help/4092434/description-of-the-security-update-for-word-viewer-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c214da08");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
  -KB4032212
  -KB4032213
  -KB4092433
  -KB4022195
  -KB4092434");
  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-2018-8375");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_compatibility_pack");
  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 = "MS18-08";
kbs = make_list(
  '4032212', # Office Compatibility Pack Service Pack 3
  '4022195', # Office Compatibility Pack Service Pack 3 - Excel Viewer
  '4032213', # Office Excel Viewer
  '4092433', # Office Word Viewer
  '4092434'  # 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();

######################################################################
# Office Compatibility Pack
######################################################################
function perform_compatibility_checks()
{
   var install, installs, path;

  installs = get_kb_list("SMB/Office/ExcelCnv/*/ProductPath");
  foreach install (keys(installs))
  {
    path = installs[install];
    path = ereg_replace(pattern:'^(.+)\\\\[^\\\\]+\\.exe$', replace:"\1\", string:path, icase:TRUE);
    if(hotfix_check_fversion(path:path, file:"excelcnv.exe", version:"12.0.6802.5000", kb:"4032212", min_version:"12.0.0.0", product:"Microsoft Office Compatibility Pack") == HCF_OLDER)
    {
      vuln = TRUE;
      break;
    }
  }
}

######################################################################
# Excel Viewer
######################################################################
function perform_excel_viewer_checks()
{
  var install, installs, path, prod, prod_exel, common_path;
  prod = "Microsoft Excel Viewer and Office Compatibility Products";
  prod_exel = "Microsoft Excel Viewer";

  installs = get_kb_list("SMB/Office/ExcelViewer/*/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\Office12"
    );

    if (hotfix_check_fversion(file:"mso.dll", version:"12.0.6802.5000", path:path, kb:"4022195", product:prod) == HCF_OLDER)
      vuln = TRUE;

    if (hotfix_check_fversion(file:"xlview.exe", version:"12.0.6802.5000", path:path, kb:"4032213", product:prod_exel) == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# Word Viewer
######################################################################
function perform_word_viewer_checks()
{
  var install, installs, path, prod;
  prod = "Microsoft Word Viewer";

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

    if (hotfix_check_fversion(file:"Wordview.exe", version:"11.0.8450.0", path:path, kb:"4092433", product:prod) == HCF_OLDER)
      vuln = TRUE;

    if (hotfix_check_fversion(file:"Mso.dll", version:"11.0.8450.0", path:path, kb:"4092434", product:prod) == HCF_OLDER)
      vuln = TRUE;
  }
}


######################################################################
# MAIN
######################################################################
perform_compatibility_checks();
perform_excel_viewer_checks();
perform_word_viewer_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_AUG_OFFICE_SHAREPOINT.NASL
    descriptionThe Microsoft Sharepoint Server installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability : - 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-2018-8378)
    last seen2020-06-01
    modified2020-06-02
    plugin id111697
    published2018-08-14
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111697
    titleSecurity Updates for Microsoft Sharepoint Server (August 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(111697);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id("CVE-2018-8378");
  script_xref(name:"MSKB", value:"4022234");
  script_xref(name:"MSKB", value:"4018392");
  script_xref(name:"MSKB", value:"4032215");
  script_xref(name:"MSKB", value:"4022236");
  script_xref(name:"MSKB", value:"4032256");
  script_xref(name:"MSFT", value:"MS18-4022234");
  script_xref(name:"MSFT", value:"MS18-4018392");
  script_xref(name:"MSFT", value:"MS18-4032215");
  script_xref(name:"MSFT", value:"MS18-4022236");
  script_xref(name:"MSFT", value:"MS18-4032256");

  script_name(english:"Security Updates for Microsoft Sharepoint Server (August 2018)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Sharepoint Server installation on the remote host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Sharepoint Server installation on the remote
host is missing a security update. It is, therefore,
affected by the following vulnerability :

  - 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-2018-8378)");
  # https://support.microsoft.com/en-us/help/4022234/description-of-the-security-update-for-sharepoint-enterprise-server
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e0c11923");
  # https://support.microsoft.com/en-us/help/4018392/description-of-the-security-update-for-sharepoint-enterprise-server
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f888033a");
  # https://support.microsoft.com/en-us/help/4032215/description-of-the-security-update-for-sharepoint-server-2010-august
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0961289a");
  # https://support.microsoft.com/en-us/help/4022236/description-of-the-security-update-for-sharepoint-server
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?80a7ca85");
  # https://support.microsoft.com/en-us/help/4032256/description-of-the-security-update-for-sharepoint-enterprise-server
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8e152f70");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4022234
  -KB4018392
  -KB4032215
  -KB4022236
  -KB4032256");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-8378");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint");
  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) 2018-2019 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("audit.inc");
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 = "MS18-08";
kbs = make_list(
  '4032215', # Microsoft SharePoint Server 2010 SP 2 - Word Automation Services
  '4022236', # Microsoft SharePoint Server 2013 SP 1
  '4018392', # Microsoft SharePoint Enterprise 2013 SP 1
  '4022234', # Microsoft SharePoint Enterprise 2013 SP 1
  '4032256'  # Microsoft SharePoint Enterprise Server 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);

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

registry_init();

var sps_2013_path, sps_2013_sp, sps_2013_edition;
var sps_2016_path, sps_2016_sp, sps_2016_edition;

vuln = FALSE;
port = kb_smb_transport();

installs = get_installs(app_name:"Microsoft SharePoint Server", exit_if_not_found:TRUE);

foreach install (installs[1])
{
  if (install["Product"] == "2010")
  {
    sps_2010_path = install['path'];
    sps_2010_sp = install['SP'];
    sps_2010_edition = install['Edition'];
  }
  else if (install["Product"] == "2013")
  {
    sps_2013_path = install['path'];
    sps_2013_sp = install['SP'];
    sps_2013_edition = install['Edition'];
  }
  else if (install["Product"] == "2016")
  {
    sps_2016_path = install['path'];
    sps_2016_sp = install['SP'];
    sps_2016_edition = install['Edition'];
  }
}

######################################################################
# SharePoint Server 2010 SP1
######################################################################
if (sps_2010_path && sps_2010_sp == "2")
{
  if (sps_2010_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2010_path, value:"WebServices\WordServer\Core");
    if (hotfix_check_fversion(file:"sword.dll", version:"14.0.7211.5000", min_version:"14.0.0.0", path:path, kb:"4032215", product:"Word Automation Services") == HCF_OLDER)
      vuln = TRUE;
  }
}
######################################################################
# SharePoint Server 2013 SP1
######################################################################
if (sps_2013_path && sps_2013_sp == "1")
{
  if (sps_2013_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2013_path, value:"WebServices\ConversionServices");
    if (hotfix_check_fversion(file:"msoserver.dll", version:"15.0.5059.1000", min_version:"15.0.0.0", path:path, kb:"4022236", product:"Microsoft SharePoint Server 2013 SP 1") == HCF_OLDER)
      vuln = TRUE;

    if (hotfix_check_fversion(file:"ppserver.dll", version:"15.0.5053.1000", min_version:"15.0.0.0", path:path, kb:"4018392", product:"Microsoft SharePoint Enterprise 2013 SP1") == HCF_OLDER)
      vuln = TRUE;

    path = hotfix_append_path(path:sps_2013_path, value:"WebServices\WordServer\Core");
    if (hotfix_check_fversion(file:"sword.dll", version:"15.0.5059.1000", min_version:"15.0.0.0", path:path, kb:"4022234", product:"Microsoft SharePoint Enterprise 2013 SP1") == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# SharePoint Enterprise Server 2016
######################################################################
if (sps_2016_path && sps_2016_sp == "0" && sps_2016_edition == "Server")
{
  commonfiles = hotfix_get_commonfilesdir();
  path = hotfix_append_path(path:commonfiles, value:"microsoft shared\Web Server Extensions\16\BIN");
  if (hotfix_check_fversion(file:"onetutil.dll", version:"16.0.4732.1000", min_version:"16.0.0.0", path:path, kb:"4032256", product:"Microsoft SharePoint Enterprise Server 2016") == HCF_OLDER)
    vuln = TRUE;
}

if (vuln)
{
  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_MS18_AUG_OFFICE.NASL
    descriptionThe Microsoft Office Products are missing a security update. It is, therefore, affected by the following vulnerability : - 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-2018-8378)
    last seen2020-06-01
    modified2020-06-02
    plugin id111696
    published2018-08-14
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111696
    titleSecurity Updates for Microsoft Office Products (August 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(111696);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id("CVE-2018-8378");
  script_xref(name:"MSKB", value:"4022198");
  script_xref(name:"MSKB", value:"3213636");
  script_xref(name:"MSKB", value:"4032239");
  script_xref(name:"MSKB", value:"4032233");
  script_xref(name:"MSFT", value:"MS18-4022198");
  script_xref(name:"MSFT", value:"MS18-3213636");
  script_xref(name:"MSFT", value:"MS18-4032239");
  script_xref(name:"MSFT", value:"MS18-4032233");

  script_name(english:"Security Updates for Microsoft Office Products (August 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 a security update.
It is, therefore, affected by the following vulnerability :

  - 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-2018-8378)");
  # https://support.microsoft.com/en-us/help/4022198/description-of-the-security-update-for-office-2010-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ef5803a");
  # https://support.microsoft.com/en-us/help/3213636/description-of-the-security-update-for-office-2010-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?93f05eca");
  # https://support.microsoft.com/en-us/help/4032239/description-of-the-security-update-for-office-2013-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?374c2453");
  # https://support.microsoft.com/en-us/help/4032233/description-of-the-security-update-for-office-2016-august-14-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?defec16d");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4022198
  -KB3213636
  -KB4032239
  -KB4032233");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-8378");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");

  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) 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 = "MS18-08";
kbs = make_list(
  '3213636', # Office 2010 SP2
  '4022198', # Office 2010 SP2
  '4032239', # Office 2013 SP1
  '4032233'  # Office 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();

######################################################################
# Office 2010, 2013, 2016
######################################################################
function perform_office_checks()
{
  local_var office_vers, office_sp, common_path, path, prod, file, kb, c2r_file, infopath_prod, msi_path, c2r_path, checks;
  office_vers = hotfix_check_office_version();

  ####################################################################
  # 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";

      path = hotfix_get_officeprogramfilesdir(officever:"14.0");
      path = hotfix_append_path(
        path  : path,
        value : "Microsoft Office\Office14"
      );

      if (hotfix_check_fversion(file:"offowc.dll", version:"14.0.7212.5000", path:path, kb:"3213636", 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"
      );

      if (hotfix_check_fversion(file:"mso.dll", version:"14.0.7212.5000", path:path, kb:"4022198", 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";

      path = hotfix_get_officecommonfilesdir(officever:"15.0");
      path = hotfix_append_path(
        path  : path,
        value : "Microsoft Shared\Office15"
      );

      if (hotfix_check_fversion(file:"mso.dll", version:"15.0.5059.1000", path:path, kb:"4032239", 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";

      path = hotfix_get_officecommonfilesdir(officever:"16.0");
      msi_path = hotfix_append_path(path: path, value : "Microsoft Shared\Office16");
      c2r_path = msi_path;
      file = "mso.dll";
      kb = "4032233";
      if (
        hotfix_check_fversion(file:file, version:"16.0.4732.1000", channel:"MSI", channel_product:"Office", path:msi_path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.8431.2299", channel:"Deferred", channel_product:"Office", path:c2r_path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.9126.2275", channel:"Deferred", channel_version:"1803", channel_product:"Office", path:c2r_path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.9126.2275", channel:"First Release for Deferred", channel_product:"Office", path:c2r_path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.10325.20118", channel:"Current", channel_product:"Office", path:c2r_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_warning();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}
  • NASL familyWindows : Microsoft Bulletins
    NASL idSMB_NT_MS18_AUG_OFFICE_WEB.NASL
    descriptionThe Microsoft Office Web Apps installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability : - 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-2018-8378)
    last seen2020-06-01
    modified2020-06-02
    plugin id111699
    published2018-08-14
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111699
    titleSecurity Updates for Microsoft Office Web Apps (August 2018)

References