Vulnerabilities > CVE-2017-0255 - Cross-site Scripting vulnerability in Microsoft Sharepoint Foundation 2013

047910
CVSS 3.5 - LOW
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
NONE
Integrity impact
PARTIAL
Availability impact
NONE
network
microsoft
CWE-79
nessus
NVD
Published: 2017-05-12
Updated: 2017-05-23

Summary

Microsoft SharePoint Foundation 2013 SP1 allows an elevation of privilege vulnerability when it does not properly sanitize a specially crafted web request, aka "Microsoft SharePoint XSS Vulnerability".

Vulnerable Configurations

Part Description Count
Application
Microsoft
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Embedding Scripts in Non-Script Elements
    This attack is a form of Cross-Site Scripting (XSS) where malicious scripts are embedded in elements that are not expected to host scripts such as image tags (<img>), comments in XML documents (< !-CDATA->), etc. These tags may not be subject to the same input validation, output validation, and other content filtering and checking routines, so this can create an opportunity for an attacker to tunnel through the application's elements and launch a XSS attack through other elements. As with all remote attacks, it is important to differentiate the ability to launch an attack (such as probing an internal network for unpatched servers) and the ability of the remote attacker to collect and interpret the output of said attack.
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Cross-Site Scripting in Error Pages
    An attacker distributes a link (or possibly some other query structure) with a request to a third party web server that is malformed and also contains a block of exploit code in order to have the exploit become live code in the resulting error page. When the third party web server receives the crafted request and notes the error it then creates an error message that echoes the malformed message, including the exploit. Doing this converts the exploit portion of the message into to valid language elements that are executed by the viewing browser. When a victim executes the query provided by the attacker the infected error message error message is returned including the exploit code which then runs in the victim's browser. XSS can result in execution of code as well as data leakage (e.g. session cookies can be sent to the attacker). This type of attack is especially dangerous since the exploit appears to come from the third party web server, who the victim may trust and hence be more vulnerable to deception.
  • Cross-Site Scripting Using Alternate Syntax
    The attacker uses alternate forms of keywords or commands that result in the same action as the primary form but which may not be caught by filters. For example, many keywords are processed in a case insensitive manner. If the site's web filtering algorithm does not convert all tags into a consistent case before the comparison with forbidden keywords it is possible to bypass filters (e.g., incomplete black lists) by using an alternate case structure. For example, the "script" tag using the alternate forms of "Script" or "ScRiPt" may bypass filters where "script" is the only form tested. Other variants using different syntax representations are also possible as well as using pollution meta-characters or entities that are eventually ignored by the rendering engine. The attack can result in the execution of otherwise prohibited functionality.

Nessus

NASL familyWindows : Microsoft Bulletins
NASL idSMB_NT_MS17_MAY_OFFICE.NASL
descriptionThe Microsoft Office application, Office Web Apps, or SharePoint Server installed on the remote Windows host is missing a security update. It is, therefore, affected by multiple vulnerabilities : - A remote code execution vulnerability exists in Microsoft Office software due to improper handling of objects in memory. An unauthenticated, remote attacker can exploit this, by convincing a user to open a specially crafted Office document, to execute arbitrary code in the context of the current user. (CVE-2017-0254) - A cross-site scripting (XSS) vulnerability exists in Microsoft SharePoint Server due improper validation of user-supplied input in web requests. An unauthenticated, remote attacker can exploit this, via a specially crafted request, to execute arbitrary script code in a user
last seen2020-06-01
modified2020-06-02
plugin id100103
published2017-05-10
reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/100103
titleSecurity Update for Microsoft Office Products (May 2017)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100103);
  script_version("1.16");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2017-0254",
    "CVE-2017-0255",
    "CVE-2017-0261",
    "CVE-2017-0262",
    "CVE-2017-0281"
  );
  script_bugtraq_id(
    98101,
    98104,
    98107,
    98279,
    98297
  );
  script_xref(name:"MSKB", value:"2596904");
  script_xref(name:"MSFT", value:"MS17-2596904");
  script_xref(name:"MSKB", value:"3114375");
  script_xref(name:"MSFT", value:"MS17-3114375");
  script_xref(name:"MSKB", value:"3118310");
  script_xref(name:"MSFT", value:"MS17-3118310");
  script_xref(name:"MSKB", value:"3162040");
  script_xref(name:"MSFT", value:"MS17-3162040");
  script_xref(name:"MSKB", value:"3162054");
  script_xref(name:"MSFT", value:"MS17-3162054");
  script_xref(name:"MSKB", value:"3162069");
  script_xref(name:"MSFT", value:"MS17-3162069");
  script_xref(name:"MSKB", value:"3172458");
  script_xref(name:"MSFT", value:"MS17-3172458");
  script_xref(name:"MSKB", value:"3172475");
  script_xref(name:"MSFT", value:"MS17-3172475");
  script_xref(name:"MSKB", value:"3172482");
  script_xref(name:"MSFT", value:"MS17-3172482");
  script_xref(name:"MSKB", value:"3172532");
  script_xref(name:"MSFT", value:"MS17-3172532");
  script_xref(name:"MSKB", value:"3172536");
  script_xref(name:"MSFT", value:"MS17-3172536");
  script_xref(name:"MSKB", value:"3178633");
  script_xref(name:"MSFT", value:"MS17-3178633");
  script_xref(name:"MSKB", value:"3178638");
  script_xref(name:"MSFT", value:"MS17-3178638");
  script_xref(name:"MSKB", value:"3178729");
  script_xref(name:"MSFT", value:"MS17-3178729");
  script_xref(name:"MSKB", value:"3191835");
  script_xref(name:"MSFT", value:"MS17-3191835");
  script_xref(name:"MSKB", value:"3191836");
  script_xref(name:"MSFT", value:"MS17-3191836");
  script_xref(name:"MSKB", value:"3191839");
  script_xref(name:"MSFT", value:"MS17-3191839");
  script_xref(name:"MSKB", value:"3191841");
  script_xref(name:"MSFT", value:"MS17-3191841");
  script_xref(name:"MSKB", value:"3191843");
  script_xref(name:"MSFT", value:"MS17-3191843");
  script_xref(name:"MSKB", value:"3191858");
  script_xref(name:"MSFT", value:"MS17-3191858");
  script_xref(name:"MSKB", value:"3191863");
  script_xref(name:"MSFT", value:"MS17-3191863");
  script_xref(name:"MSKB", value:"3191865");
  script_xref(name:"MSFT", value:"MS17-3191865");
  script_xref(name:"MSKB", value:"3191880");
  script_xref(name:"MSFT", value:"MS17-3191880");
  script_xref(name:"MSKB", value:"3191881");
  script_xref(name:"MSFT", value:"MS17-3191881");
  script_xref(name:"MSKB", value:"3191885");
  script_xref(name:"MSFT", value:"MS17-3191885");
  script_xref(name:"MSKB", value:"3191886");
  script_xref(name:"MSFT", value:"MS17-3191886");
  script_xref(name:"MSKB", value:"3191887");
  script_xref(name:"MSFT", value:"MS17-3191887");
  script_xref(name:"MSKB", value:"3191888");
  script_xref(name:"MSFT", value:"MS17-3191888");
  script_xref(name:"MSKB", value:"3191890");
  script_xref(name:"MSFT", value:"MS17-3191890");
  script_xref(name:"MSKB", value:"3191895");
  script_xref(name:"MSFT", value:"MS17-3191895");
  script_xref(name:"MSKB", value:"3191899");
  script_xref(name:"MSFT", value:"MS17-3191899");
  script_xref(name:"MSKB", value:"3191904");
  script_xref(name:"MSFT", value:"MS17-3191904");
  script_xref(name:"MSKB", value:"3191909");
  script_xref(name:"MSFT", value:"MS17-3191909");
  script_xref(name:"MSKB", value:"3191913");
  script_xref(name:"MSFT", value:"MS17-3191913");
  script_xref(name:"MSKB", value:"3191914");
  script_xref(name:"MSFT", value:"MS17-3191914");
  script_xref(name:"MSKB", value:"3191915");
  script_xref(name:"MSFT", value:"MS17-3191915");
  script_xref(name:"IAVA", value:"2017-A-0143");

  script_name(english:"Security Update for Microsoft Office Products (May 2017)");
  script_summary(english:"Checks the file versions.");

  script_set_attribute(attribute:"synopsis", value:
"An application installed on the remote Windows host is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office application, Office Web Apps, or SharePoint
Server installed on the remote Windows host is missing a security
update. It is, therefore, affected by multiple vulnerabilities :

  - A remote code execution vulnerability exists in
    Microsoft Office software due to improper handling of
    objects in memory. An unauthenticated, remote attacker
    can exploit this, by convincing a user to open a
    specially crafted Office document, to execute arbitrary
    code in the context of the current user. (CVE-2017-0254)

  - A cross-site scripting (XSS) vulnerability exists in
    Microsoft SharePoint Server due improper validation of
    user-supplied input in web requests. An unauthenticated,
    remote attacker can exploit this, via a specially
    crafted request, to execute arbitrary script code in a
    user's browser session. (CVE-2017-0255)

  - A remote code execution vulnerability exists in
    Microsoft Office due to improper handling of malformed
    graphics images. An unauthenticated, remote attacker can
    exploit this, by convincing a user to open a specially
    crafted EPS file, to execute arbitrary code in the
    context of the current user. (CVE-2017-0261)

  - A remote code execution vulnerability exists in
    Microsoft Office when handling malformed graphics
    images. An unauthenticated, remote attacker can exploit
    this, by convincing a user to open a specially crafted
    EPS file or visit a specially crafted website, to
    execute arbitrary code. (CVE-2017-0262)

  - A remote code execution vulnerability exists in
    Microsoft Office due to improper handling of objects in
    memory. An unauthenticated, remote attacker can exploit
    this, by convincing a user to open a specially crafted
    file, to execute arbitrary code in the context of the
    current user. (CVE-2017-0281)");
  script_set_attribute(attribute:"see_also", value:"https://portal.msrc.microsoft.com/en-us/security-guidance/summary");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office 2007,
2010, 2013, and 2016; Microsoft Word 2007, 2010, 2013, and 2016; Skype
for Business 2016; Microsoft Word Viewer; Microsoft Office
Compatibility Pack; SharePoint Server 2010; SharePoint Enterprise
Server 2013 and 2016; SharePoint Foundation 2013; Word Automation
Services on Microsoft SharePoint Server 2010 and 2013; Microsoft
Office Project Server 2013; Microsoft Office Web Apps Server 2010 and
2013; and Office Online 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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-0281");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_compatibility_pack");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_web_apps");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_online_server");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint_server");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint_foundation");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:project");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:skype_for_business");
  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) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "microsoft_sharepoint_installed.nbin", "microsoft_owa_installed.nbin", "microsoft_office_compatibility_pack_installed.nbin", "microsoft_lync_server_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 = "MS17-05";
kbs = make_list(
  '2596904', # Office 2007 SP3
  '3114375', # Office 2016
  '3118310', # Office 2010 SP2
  '3162040', # Word Automation Services on SharePoint Server 2013 SP1
  '3162054', # SharePoint Foundation 2013 SP1
  '3162069', # SharePoint Server 2013 SP1
  '3172458', # Office 2013 SP1
  '3172475', # Sharepoint Server 2013 SP1
  '3172482', # SharePoint Server 2013 SP1
  '3172532', # SharePoint Server 2013 SP1
  '3172536', # SharePoint Server 2013 SP1
  '3178633', # SharePoint Server 2013 SP1
  '3178638', # SharePoint Server 2013 SP1
  '3178729', # Word 2013 SP1
  '3191835', # Office Compatibility Pack SP3
  '3191836', # Word 2007 SP3
  '3191839', # SharePoint Server 2010 SP2
  '3191839', # Word Automation Services on SharePoint Server 2010 SP2
  '3191841', # Office 2010 SP2
  '3191841', # Word 2010 SP2
  '3191843', # Word 2010 SP2
  '3191858', # Skype for Business 2016
  '3191863', # Office 2016
  '3191865', # Word 2016
  '3191880', # SharePoint Enterprise Server 2016
  '3191881', # Office 2016
  '3191885', # Office 2013 SP1
  '3191886', # SharePoint Server 2013 SP1
  '3191887', # Excel Services on SharePoint Server 2013
  '3191888', # Office Web Apps 2013 SP1
  '3191890', # Project Server 2013 SP1
  '3191895', # Office 2007 SP3
  '3191899', # Office 2010 SP2
  '3191904', # Office Web Apps 2010 SP2
  '3191909', # Office Word Viewer
  '3191913', # SharePoint Enterprise Server 2013 SP1
  '3191914', # SharePoint Foundation 2013 SP1
  '3191915'  # Office Online Server 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);

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

registry_init();
hklm = registry_hive_connect(hive:HKEY_LOCAL_MACHINE, exit_on_fail:TRUE);
global_var office_online_server_path = get_registry_value(
  handle : hklm,
  item   : "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Office16.WacServer\InstallLocation"
);
RegCloseKey(handle:hklm);
close_registry(close:FALSE);

vuln = FALSE;
xss  = 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;
  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";
      path = hotfix_append_path(
        path  : hotfix_get_officecommonfilesdir(officever:"12.0"),
        value : "Microsoft Shared\Office12"
      );
      if (hotfix_check_fversion(file:"mso.dll", version:"12.0.6768.5000", path:path, kb:"3191895", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
      if (hotfix_check_fversion(file:"riched20.dll", version:"12.0.6768.5000", path:path, kb:"2596904", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }

  ####################################################################
  # Office 2010 SP2 Checks
  # wwlibcxm.dll only exists if KB2428677 is installed
  ####################################################################
  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:"14.0.7181.5000", path:path, kb:"3191899", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(
        path  : common_path,
        value : "\Microsoft Shared\GRPHFLT"
      );
      if (hotfix_check_fversion(file:"epsimp32.flt", version:"2010.1400.7181.5002", min_version:"2010.1400.0.0", path:path, kb:"3118310", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_get_officeprogramfilesdir(officever:"14.0");
      if (hotfix_check_fversion(file:"wwlibcxm.dll", version:"14.0.7181.5000", path:path, kb:"3191841", 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:"15.0.4927.1000", path:path, kb:"3191885", bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\GRPHFLT"
      );
      if (hotfix_check_fversion(file:"epsimp32.flt", version:"2012.1500.4927.1002", min_version:"2012.1500.0.0", path:path, kb:"3172458", 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");

      kb   = "3191881";
      file = "mso.dll";
      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\Office16"
      );
      if (
        hotfix_check_fversion(file:file, version:"16.0.4534.1000", channel:"MSI", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.6925.1059", channel:"Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7329.1054", channel:"Deferred", channel_version:"1609", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7726.1036", channel:"First Release for Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7927.1024", channel:"Current", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
      )
        vuln = TRUE;

      kb   = "3191863";
      file = "mso99lres.dll";
      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\Office16"
      );
      if (
        hotfix_check_fversion(file:file, version:"16.0.4519.1000", channel:"MSI", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.6925.1059", channel:"Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7329.1054", channel:"Deferred", channel_version:"1609", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7766.7054", channel:"First Release for Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7927.1024", channel:"Current", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
      )
        vuln = TRUE;

      kb   = "3114375";
      file = "epsimp32.flt";
      path = hotfix_append_path(
        path  : common_path,
        value : "Microsoft Shared\GRPHFLT"
      );
      if (
        hotfix_check_fversion(file:file, version:"16.0.4534.1002", channel:"MSI", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.6925.1059", channel:"Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7329.1054", channel:"Deferred", channel_version:"1609", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7726.1036", channel:"First Release for Deferred", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7927.1024", channel:"Current", channel_product:"Office", path:path, kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
      )
        vuln = TRUE;
    }
  }
}

######################################################################
# Word 2007, 2010, 2013, 2016
######################################################################
function perform_word_checks()
{
  local_var word_checks, kb16;

  kb16 = "3191865";
  word_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6768.5000", "kb", "3191836"),
    "14.0", make_array("sp", 2, "version", "14.0.7181.5000", "kb", "3191843"),
    "15.0", make_array("sp", 1, "version", "15.0.4927.1000", "kb", "3178729"),
    "16.0", make_nested_list(
      make_array("sp", 0, "version", "16.0.4534.1000", "channel", "MSI", "kb", kb16),
      make_array("sp", 0, "version", "16.0.6965.2150", "channel", "Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.7369.2130", "channel", "Deferred", "channel_version", "1609", "kb", kb16),
      make_array("sp", 0, "version", "16.0.7766.2084", "channel", "First Release for Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.7967.2161", "channel", "Current", "kb", kb16)
      )
  );
  if (hotfix_check_office_product(product:"Word", checks:word_checks, bulletin:bulletin))
    vuln = TRUE;
}

######################################################################
# Compatibility Pack
######################################################################
function perform_comppack_checks()
{
  local_var install, installs, path;

  ####################################################################
  # Word Compatibility Pack
  ####################################################################
  installs = get_kb_list("SMB/Office/WordCnv/*/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:"wordcnv.dll",  version:"12.0.6768.5000", kb:"3191835", bulletin:bulletin, min_version:"12.0.0.0", product:"Microsoft Office Compatibility Pack") == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# Word Viewer
######################################################################
function perform_viewer_checks()
{
  var word_vwr_checks = make_array(
    "11.0", make_array("version", "11.0.8441.0", "kb", "3191909")
  );
  if (hotfix_check_office_product(product:"WordViewer", display_name:"Word Viewer", checks:word_vwr_checks, bulletin:bulletin))
    vuln = TRUE;
}

######################################################################
# Skype for Business 2016
######################################################################
function perform_skype_checks()
{
  if (int(get_install_count(app_name:"Microsoft Lync")) <= 0)
    return NULL;

  var lync_install, lync_installs, kb, file, prod;

  kb = "3191858";
  file = "Lync.exe";
  prod = "Skype for Business 2016";
  lync_installs = get_installs(app_name:"Microsoft Lync");
  foreach lync_install (lync_installs[1])
  {
    if (lync_install["version"] !~ "^16\.0\.") continue;
    if ("Server" >< lync_install["Product"]) continue;

    # MSI
    if (lync_install['Channel'] == "MSI" || empty_or_null(lync_install['Channel']))
    {
      if (hotfix_check_fversion(file:file, version:"16.0.4534.1000", channel:"MSI", channel_product:"Lync", path:lync_install["path"], kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
    # Deferred
    else if (lync_install['Channel'] == "Deferred")
    {
      if (
        hotfix_check_fversion(file:file, version:"16.0.6965.2150", channel:"Deferred", channel_product:"Lync", path:lync_install["path"], kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER ||
        hotfix_check_fversion(file:file, version:"16.0.7369.2130", channel:"Deferred", channel_version:"1609", channel_product:"Lync", path:lync_install["path"], kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER
      )
        vuln = TRUE;
    }
    else if (lync_install['Channel'] == "First Release for Deferred")
    {
      if (hotfix_check_fversion(file:file, version:"16.0.7766.2084", channel:"First Release for Deferred", channel_product:"Lync", path:lync_install["path"], kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
    else if (lync_install['Channel'] == "Current")
    {
      if (hotfix_check_fversion(file:file, version:"16.0.7967.2161", channel:"Current", channel_product:"Lync", path:lync_install["path"], kb:kb, bulletin:bulletin, product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }
}

######################################################################
# Office Web Apps 2010, 2013
######################################################################
function perform_owa_checks()
{
  local_var owa_installs, owa_install;
  local_var owa_2010_path, owa_2010_sp;
  local_var owa_2013_path, owa_2013_sp;
  local_var path;

  # 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"] == "2013")
      {
        owa_2013_path = owa_install["path"];
        owa_2013_sp = owa_install["SP"];
      }
    }
  }

  ####################################################################
  # 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:"sword.dll", version:"14.0.7181.5000", min_version:"14.0.7015.1000", path:path, kb:"3191904", bulletin:bulletin, product:"Office Web Apps 2010") == HCF_OLDER)
      vuln = TRUE;
  }

  ####################################################################
  # Office Web Apps 2013 SP1
  ####################################################################
  if (owa_2013_path && (!isnull(owa_2013_sp) && owa_2013_sp == "1"))
  {
    path = hotfix_append_path(path:owa_2013_path, value:"WordConversionService\bin\Converter");
    if (hotfix_check_fversion(file:"sword.dll", version:"15.0.4927.1000", min_version:"15.0.4571.1500", path:path, kb:"3191888", bulletin:bulletin, product:"Office Web Apps 2013") == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# Office Online Server
######################################################################
function perform_oos_checks()
{
  var path;

  if(office_online_server_path)
  {
    path = hotfix_append_path(path:office_online_server_path, value:"WordConversionService\bin\Converter");
    if (hotfix_check_fversion(file:"sword.dll", version:"16.0.7726.1035", min_version:"16.0.6000.0", path:path, kb:"3191915", bulletin:bulletin, product:"Office Online Server") == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# SharePoint
######################################################################
function perform_sharepoint_checks()
{
  local_var sps_2010_path, sps_2010_sp, sps_2010_edition;
  local_var sps_2013_path, sps_2013_sp, sps_2013_edition;
  local_var sps_2016_path, sps_2016_sp, sps_2016_edition;
  local_var installs, install, path;

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

  foreach install (installs[1])
  {
    if (install["Product"] == "2016")
    {
      sps_2016_path = install['path'];
      sps_2016_sp = install['SP'];
      sps_2016_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"] == "2010")
    {
      sps_2010_path = install['path'];
      sps_2010_sp = install['SP'];
      sps_2010_edition = install['Edition'];
    }
  }

  ######################################################################
  # 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:"sword.dll", version:"16.0.4534.1000", min_version:"16.0.0.0", path:path, kb:"3191880", bulletin:bulletin, product:"Office SharePoint Server 2016") == HCF_OLDER)
      vuln = TRUE;
  }

  ######################################################################
  # SharePoint Server 2013 SP1
  ######################################################################
  if (sps_2013_path && sps_2013_sp == "1")
  {
    if(sps_2013_edition == "Server")
    {
      # Files under <sps_2013_path>\bin
      path = hotfix_append_path(path:sps_2013_path, value:"Bin");
      if (hotfix_check_fversion(file:"Microsoft.Office.Project.Server.Library.dll", version:"15.0.4873.1000", min_version:"15.0.0.0", path:path, kb:"3191890", bulletin:bulletin, product:"Microsoft Project Server 2013") == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"xlsrv.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3191887", bulletin:bulletin, product:"Office SharePoint Server 2013 Excel Services") == HCF_OLDER)
       vuln = TRUE;

      # Files under <sps_2013_path>\WebServices\ConversionServices
      path = hotfix_append_path(path:sps_2013_path, value:"WebServices\ConversionServices");
      if (hotfix_check_fversion(file:"sword.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3162040", bulletin:bulletin, product:"Office SharePoint Server 2013 Word Automation Services") == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"oartserver.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3162069", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"msores.dll", version:"15.0.4913.1000", min_version:"15.0.0.0", path:path, kb:"3172482", bulletin:bulletin, product:"SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"htmlutil.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3178633", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      if (hotfix_check_fversion(file:"msoserver.dll", version:"15.0.4927.1000", path:path, kb:"3172475", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(path:windir, value:"Microsoft.NET\assembly\GAC_MSIL\Microsoft.Office.Visio.Server\v4.0_15.0.0.0__71e9bce111e9429c");
      if (hotfix_check_fversion(file:"Microsoft.Office.Visio.Server.dll", version:"15.0.4797.1000", path:path, kb:"3178638", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(path:windir, value:"Microsoft.NET\assembly\GAC_MSIL\Microsoft.SharePoint.Publishing\v4.0_15.0.0.0__71e9bce111e9429c");
      if (hotfix_check_fversion(file:"Microsoft.SharePoint.Publishing.dll", version:"15.0.4927.1000", path:path, kb:"3191886", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(path:windir, value:"Microsoft.NET\assembly\GAC_MSIL\Microsoft.SharePoint.Client.UserProfiles\v4.0_15.0.0.0__71e9bce111e9429c");
      if (hotfix_check_fversion(file:"Microsoft.SharePoint.Client.UserProfiles.dll", version:"15.0.4745.1000", path:path, kb:"3172532", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;

      path = hotfix_append_path(path:windir, value:"Microsoft.NET\assembly\GAC_MSIL\Microsoft.Office.InfoPath.Server\v4.0_15.0.0.0__71e9bce111e9429c");
      if (hotfix_check_fversion(file:"Microsoft.Office.InfoPath.Server.dll", version:"15.0.4873.1000", path:path, kb:"3172536", bulletin:bulletin, product:"Office SharePoint Server 2013") == HCF_OLDER)
        vuln = TRUE;
    }
    else if (sps_2013_edition == "Foundation")
    {
      var commonfiles = hotfix_get_commonfilesdir();
      if (!commonfiles) commonfiles = hotfix_get_commonfilesdirx86();

      if(commonfiles) path = hotfix_append_path(path:commonfiles, value:"Microsoft Shared\Web Server Extensions\15\BIN");
      else path = hotfix_append_path(path:sps_2013_path, value:"BIN");
      if (hotfix_check_fversion(file:"onetutil.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3191914", bulletin:bulletin, product:"Office Sharepoint Foundation 2013") == HCF_OLDER)
      {
        vuln = TRUE;
        xss = TRUE;
      }

      path = hotfix_append_path(path:sps_2013_path, value:"WebServices\ConversionServices");
      if (hotfix_check_fversion(file:"htmlutil.dll", version:"15.0.4927.1000", min_version:"15.0.0.0", path:path, kb:"3162054", bulletin:bulletin, product:"Office Sharepoint Foundation 2013") == 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:"WebServices\WordServer\Core");
    if (hotfix_check_fversion(file:"sword.dll", version:"14.0.7181.5000", path:path, kb:"3191839", bulletin:bulletin, product:"Office SharePoint Server 2010 Word Automation Services") == HCF_OLDER)
      vuln = TRUE;
  }
}

perform_office_checks();
perform_word_checks();
perform_comppack_checks();
perform_viewer_checks();
perform_skype_checks();
perform_owa_checks();
perform_oos_checks();
perform_sharepoint_checks();

if (vuln)
{
  # CVE-2017-0255
  if(xss) replace_kb_item(name:'www/'+port+'/XSS', value:TRUE);

  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