Vulnerabilities > CVE-2018-8627 - Use of Uninitialized Resource vulnerability in Microsoft products

#
# (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(119614);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/01");

  script_cve_id("CVE-2018-8597", "CVE-2018-8627", "CVE-2018-8628");
  script_bugtraq_id(106100, 106104, 106120);

  script_name(english:"Security Update for Microsoft Office (December 2018) (macOS)");
  script_summary(english:"Checks the version of Microsoft Office for macOS");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote macOS or Mac OS X host is
affected by remote code execution vulnerability.");
  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 the following vulnerability:

  - 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. Users whose accounts
  are configured to have fewer user rights on the system could be
  less impacted than users who operate with administrative user
  rights.

  Exploitation of the vulnerability requires that a user
  open a specially crafted file with an affected version of
  Microsoft Excel. 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) containing a specially crafted file designed to exploit
  the vulnerability. An attacker would have no way to force users
  to visit the website. Instead, an attacker would have to convince
  users to click a link, typically by way of an enticement in an
  email or instant message, and then convince them to open the
  specially crafted file. (CVE-2018-8597)

  - An information disclosure vulnerability exists when Microsoft
  Excel 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 Excel
  software. (CVE-2018-8627)

  - A remote code execution vulnerability exists in Microsoft
  PowerPoint 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. Users whose
  accounts are configured to have fewer user rights on the system
  could be less impacted than users who operate with administrative
  user rights.

  Exploitation of the vulnerability requires that a user open a
  specially crafted file with an affected version of Microsoft
  Office PowerPoint 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
  designed to exploit the vulnerability. An attacker would have no
  way to force users to visit the website. Instead, an attacker
  would have to convince users to click a link, typically by way of
  an enticement in an email or instant message, and then convince
  them to open the specially crafted file. (CVE-2018-8628)");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-2016-mac#december-2018-release
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?31ee9db7");
  # https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-8597
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a57f509f");
  # https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-8627
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?25df89fa");
  # https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2018-8628
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e184b517");
  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-2018-8597");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/13");

  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_for_mac");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  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) 2018-2019 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"
);

#2019
min_ver_19 = '16.17.0';
fix_ver_19 = '16.20.0';
fix_disp_19 = '16.20.0 (18120801)';

#2016
min_ver_16 = '16';
fix_ver_16 = '16.16.5';
fix_disp_16 = '16.16.5 (18120801)';
report = '';

for(i = 0; i < len(apps); i++)
{
  app = apps[i];
  installs = get_installs(app_name:app);
  if (isnull(installs[1])) continue;

  for(j = 0; j < len(installs[1]); j++)
  {
    install = installs[1][j];
    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);

#
# (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(119686);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/01");

  script_cve_id(
    "CVE-2018-8580",
    "CVE-2018-8627",
    "CVE-2018-8628",
    "CVE-2018-8635",
    "CVE-2018-8650"
  );
  script_xref(name:"MSKB", value:"2965309");
  script_xref(name:"MSKB", value:"4092468");
  script_xref(name:"MSKB", value:"4092472");
  script_xref(name:"MSKB", value:"4461558");
  script_xref(name:"MSKB", value:"4461569");
  script_xref(name:"MSKB", value:"4461541");
  script_xref(name:"MSKB", value:"4461548");
  script_xref(name:"MSKB", value:"4461549");
  script_xref(name:"MSKB", value:"4461465");
  script_xref(name:"MSKB", value:"4461580");
  script_xref(name:"MSFT", value:"MS18-2965309");
  script_xref(name:"MSFT", value:"MS18-4092468");
  script_xref(name:"MSFT", value:"MS18-4092472");
  script_xref(name:"MSFT", value:"MS18-4461558");
  script_xref(name:"MSFT", value:"MS18-4461569");
  script_xref(name:"MSFT", value:"MS18-4461541");
  script_xref(name:"MSFT", value:"MS18-4461548");
  script_xref(name:"MSFT", value:"MS18-4461549");
  script_xref(name:"MSFT", value:"MS18-4461465");
  script_xref(name:"MSFT", value:"MS18-4461580");

  script_name(english:"Security Updates for Microsoft Sharepoint Server (December 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 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 :

  - An information disclosure vulnerability exists when
    Microsoft Excel 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 Excel software. The security update
    addresses the vulnerability by properly initializing the
    affected variable. (CVE-2018-8627)

  - An elevation of privilege vulnerability exists when
    Microsoft SharePoint Server does not properly sanitize a
    specially crafted authentication request to an affected
    SharePoint server. An attacker who successfully
    exploited this vulnerability could execute malicious
    code on a vulnerable server in the context of the
    SharePoint application pool account.  (CVE-2018-8635)

  - An information disclosure vulnerability exists where
    certain modes of the search function in Microsoft
    SharePoint Server are vulnerable to cross-site search
    attacks (a variant of cross-site request forgery, CSRF).
    When users are simultaneously logged in to Microsoft
    SharePoint Server and visit a malicious web page, the
    attacker can, through standard browser functionality,
    induce the browser to invoke search queries as the
    logged in user. While the attacker cant access the
    search results or documents as such, the attacker can
    determine whether the query did return results or not,
    and thus by issuing targeted queries discover facts
    about documents that are searchable for the logged-in
    user. The security update addresses the vulnerability by
    running the search queries in a way that doesnt expose
    them to this browser vulnerability. (CVE-2018-8580)

  - A remote code execution vulnerability exists in
    Microsoft PowerPoint 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-2018-8628)");
  # https://support.microsoft.com/en-us/help/4092472/descriptionofthesecurityupdateforsharepointenterpriseserver2013decembe
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?70c99df5");
  # https://support.microsoft.com/en-us/help/4461569/descriptionofthesecurityupdateforsharepointserver2010december112018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?00f6be56");
  # https://support.microsoft.com/en-us/help/4461558/descriptionofthesecurityupdateforsharepointfoundation2013december11201
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4997c825");
  # https://support.microsoft.com/en-us/help/4461549/descriptionofthesecurityupdateforsharepointenterpriseserver2013decembe
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6fab3001");
  # https://support.microsoft.com/en-us/help/4461465/descriptionofthesecurityupdateforsharepointserver2010december112018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?de9bd607");
  # https://support.microsoft.com/en-us/help/4461541/descriptionofthesecurityupdateforsharepointenterpriseserver2016decembe
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e996ac3b");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB2965309
  -KB4092468
  -KB4092472
  -KB4461558
  -KB4461569
  -KB4461548
  -KB4461549
  -KB4461465
  -KB4461580
  -KB4461541");
  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-2018-8628");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/14");

  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("misc_func.inc");
include("install_func.inc");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS18-12";
kbs = make_list(
  '2965309', # Microsoft SharePoint Server 2010
  '4092468', # SharePoint Enterprise Server 2013
  '4092472', # SharePoint Enterprise Server 2013
  '4461558', # SharePoint Foundation 2013
  '4461569', # Microsoft SharePoint Server 2010
  '4461580', #  Microsoft SharePoint Foundation 2010 
  '4461541', # SharePoint Server 2016
  '4461548', # Sharepoint 2019
  '4461549', # SharePoint Enterprise Server 2013
  '4461465'  # 2010 Microsoft Business Productivity Servers 
);

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();

var sps_2010_path, sps_2010_sp, sps_2010_edition;
var sps_2013_path, sps_2013_sp, sps_2013_edition;
var sps_2016_path, sps_2016_sp, sps_2016_edition;
var sps_2019_path, sps_2019_sp, sps_2019_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'];
  }
  else if (install["Product"] == "2019")
  {
    sps_2019_path = install['path'];
    sps_2019_sp = install['SP'];
    sps_2019_edition = install['Edition'];
  } 
}

######################################################################
# SharePoint Server Foundation 2010
######################################################################
if (sps_2010_path && sps_2010_sp == "2" && sps_2010_edition == "Foundation")
{
  commonfiles = hotfix_get_commonfilesdir();
  path = hotfix_append_path(path:commonfiles, value:"microsoft shared\Web Server Extensions\14\BIN");
  if (hotfix_check_fversion(file:"onetutil.dll", version:"14.0.7225.5000", min_version:"14.0.0.0", path:path, kb:"4461580", product:"Microsoft SharePoint Server 2010 SP2") == HCF_OLDER)
    vuln = TRUE;

}

######################################################################
# SharePoint Server 2010 SP2
######################################################################

if (sps_2010_path && sps_2010_sp == "2" && sps_2010_edition == "Server")
{

  path = hotfix_append_path(path:sps_2010_path, value:"Bin");
  if (hotfix_check_fversion(file:"xlsrv.dll", version:"14.0.7225.5000", min_version:"14.0.0.0", path:path, kb:"4461569", product:"Microsoft SharePoint Server 2010 SP2 (Excel Service)") == HCF_OLDER)
    vuln = TRUE;

  commonfiles = hotfix_get_commonfilesdir();
  path = hotfix_append_path(path:commonfiles, value:"microsoft shared\Web Server Extensions\14\ISAPI");
  if (hotfix_check_fversion(file:"microsoft.sharepoint.portal.dll", version:"14.0.7225.5000", min_version:"14.0.0.0", path:path, kb:"4461465", product:"Microsoft SharePoint Server 2010 SP2") == HCF_OLDER)
    vuln = TRUE;
}

######################################################################
# SharePoint Enterprise 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:"15.0.5093.1000", min_version:"15.0.0.0", path:path, kb:"4461549", product:"Microsoft SharePoint Enterprise Server 2013 SP 1") == HCF_OLDER)
      vuln = TRUE;
    
    path = hotfix_append_path(path:sps_2013_path, value:"WebServices\ConversionServices");
    if (hotfix_check_fversion(file:"ppserver.dll", version:"15.0.5093.1000", min_version:"15.0.0.0", path:path, kb:"4092472", product:"Microsoft SharePoint Enterprise Server 2013 SP 1") == HCF_OLDER)
      vuln = TRUE;
  }
  else if (sps_2013_edition == "Foundation")
  {
    commonfiles = hotfix_get_commonfilesdir();
    path = hotfix_append_path(path:commonfiles, value:"microsoft shared\Web Server Extensions\15\bin");
    if (hotfix_check_fversion(file:"csisrv.dll", version:"15.0.5093.1000", min_version:"15.0.0.0", path:path, kb:"4461558", product:"Microsoft SharePoint Enterprise Server 2013 SP 1") == HCF_OLDER)
      vuln = TRUE;
    
  }
}

######################################################################
# SharePoint Server 2016
######################################################################
if (sps_2016_path && sps_2016_sp == "0" && sps_2016_edition == "Server")
{
  path = hotfix_append_path(path:sps_2016_path, value:"WebServices\ConversionServices");
  if (hotfix_check_fversion(file:"msoserver.dll", version:"16.0.4783.1000", min_version:"16.0.0.0", path:path, kb:"4461541", product:"Microsoft SharePoint Server 2016") == HCF_OLDER)
    vuln = TRUE;
}

######################################################################
# SharePoint Server 2019
######################################################################
if (sps_2019_path && sps_2019_sp == "0" && sps_2019_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:"16.0.10338.12107", min_version:"16.0.0.0", path:path, kb:"4461548", product:"Microsoft SharePoint Server 2019") == HCF_OLDER)
    vuln = TRUE;
}


# check for vuln and report... 
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');
}