Vulnerabilities > CVE-2015-6039 - Cross-site Scripting vulnerability in Microsoft Sharepoint Foundation and Sharepoint Server

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: 2015-10-14
Updated: 2018-10-12

Summary

Cross-site scripting (XSS) vulnerability in Microsoft SharePoint Server 2013 SP1 and SharePoint Foundation 2013 SP1 allows remote authenticated users to inject arbitrary web script or HTML via crafted content in an Office Marketplace instance, aka "Microsoft SharePoint Security Feature Bypass Vulnerability."

Vulnerable Configurations

Part Description Count
Application
Microsoft
2

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_MS15-110.NASL
descriptionThe remote Windows host has a version of Microsoft Office, Excel, Excel Viewer, SharePoint Server, Microsoft Office Compatibility Pack, or Microsoft Office Web Apps installed that is affected by multiple vulnerabilities : - Multiple remote code execution vulnerabilities exist due to improper handling of objects in memory. A remote attacker can exploit these vulnerabilities by convincing a user to open a specially crafted file, resulting in execution of arbitrary code in the context of the current user. (CVE-2015-2555, CVE-2015-2557, CVE-2015-2558) - An information disclosure vulnerability exists in the SharePoint InfoPath Forms Services due to improper parsing of document type definitions (DTD) in XML files. A remote attacker can exploit this, via a crafted XML file, to browse the contents of arbitrary files on a SharePoint server. (CVE-2015-2556) - A cross-site scripting vulnerability exists in Office Web Apps Server due to improper sanitization of crafted requests before returning it to the user. A remote attacker can exploit this to run arbitrary script code in the user
last seen2020-06-01
modified2020-06-02
plugin id86374
published2015-10-13
reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/86374
titleMS15-110: Security Updates for Microsoft Office to Address Remote Code Execution (3089440)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(86374);
  script_version("1.10");
  script_cvs_date("Date: 2018/07/30 15:31:33");

  script_cve_id(
    "CVE-2015-2555",
    "CVE-2015-2556",
    "CVE-2015-2557",
    "CVE-2015-2558",
    "CVE-2015-6037",
    "CVE-2015-6039"
  );
  script_bugtraq_id(
    76988,
    76996,
    76997,
    77003,
    77009,
    77011
  );
  script_xref(name:"MSFT", value:"MS15-110");
  script_xref(name:"MSKB", value:"2553405");
  script_xref(name:"MSKB", value:"2596670");
  script_xref(name:"MSKB", value:"2920693");
  script_xref(name:"MSKB", value:"3054994");
  script_xref(name:"MSKB", value:"3085514");
  script_xref(name:"MSKB", value:"3085520");
  script_xref(name:"MSKB", value:"3085542");
  script_xref(name:"MSKB", value:"3085567");
  script_xref(name:"MSKB", value:"3085568");
  script_xref(name:"MSKB", value:"3085571");
  script_xref(name:"MSKB", value:"3085582");
  script_xref(name:"MSKB", value:"3085583");
  script_xref(name:"MSKB", value:"3085595");
  script_xref(name:"MSKB", value:"3085596");
  script_xref(name:"MSKB", value:"3085609");
  script_xref(name:"MSKB", value:"3085615");
  script_xref(name:"MSKB", value:"3085618");
  script_xref(name:"MSKB", value:"3085619");

  script_name(english:"MS15-110: Security Updates for Microsoft Office to Address Remote Code Execution (3089440)");
  script_summary(english:"Checks the Office and SharePoint versions.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Windows host has a version of Microsoft Office, Excel,
Excel Viewer, SharePoint Server, Microsoft Office Compatibility Pack,
or Microsoft Office Web Apps installed that is affected by multiple
vulnerabilities :

  - Multiple remote code execution vulnerabilities exist due
    to improper handling of objects in memory. A remote
    attacker can exploit these vulnerabilities by convincing
    a user to open a specially crafted file, resulting in
    execution of arbitrary code in the context of the current
    user. (CVE-2015-2555, CVE-2015-2557, CVE-2015-2558)

  - An information disclosure vulnerability exists in the
    SharePoint InfoPath Forms Services due to improper
    parsing of document type definitions (DTD) in XML files.
    A remote attacker can exploit this, via a crafted XML
    file, to browse the contents of arbitrary files on a
    SharePoint server. (CVE-2015-2556)

  - A cross-site scripting vulnerability exists in Office
    Web Apps Server due to improper sanitization of crafted
    requests before returning it to the user. A remote
    attacker can exploit this to run arbitrary script code
    in the user's browser session. (CVE-2015-6037)

  - A security feature bypass vulnerability exists in
    SharePoint due to improper enforcement of permission
    levels for applications or users. This allows Office
    Marketplace to inject JavaScript code that will persist
    in a SharePoint page. A remote attacker can exploit this
    to conduct a cross-site scripting attack, resulting in
    execution of arbitrary code in the user's browser
    session. (CVE-2015-6039)");
  script_set_attribute(attribute:"see_also", value:"https://technet.microsoft.com/library/security/ms15-110");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Office 2007, 2010, 2013,
2013 RT, 2016; SharePoint Server 2007, 2010, 2013; Microsoft Office
Compatibility Pack SP3; Microsoft Excel Viewer; and Microsoft Office
Web Apps 2010, 2013.");
  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_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/10/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/10/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/10/13");

  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:excel_viewer");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:visio");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint_server");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office_web_apps");
  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) 2015-2018 Tenable Network Security, Inc.");

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

global_var bulletin, vuln;

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = 'MS15-110';
kbs = make_list(
  2553405, # SharePoint Server 2010
  2596670, # SharePoint Server 2007
  2920693, # Excel 2016
  3054994, # Excel Services for SharePoint Server 2007
  3085514, # Visio 2010 SP2
  3085520, # Office Web Apps 2010
  3085542, # Visio 2007 SP3
  3085567, # SharePoint Server 2013
  3085568, # Excel Services for SharePoint Server 2013
  3085571, # Office Web Apps 2013
  3085582, # SharePoint Foundation 2013
  3085583, # Excel 2013 SP1
  3085595, # Excel Web App 2010
  3085596, # Excel Services for SharePoint Server 2010
  3085609, # Excel 2010 SP2
  3085615, # Excel 2007 SP3
  3085618, # Compatibility Pack
  3085619  # Excel 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);

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

######################################################################
# SharePoint
######################################################################
function perform_sharepoint_checks()
{
  local_var sps_2007_path, sps_2007_sp, sps_2007_edition;
  local_var sps_2010_path, sps_2010_sp, sps_2010_edition;
  local_var sps_2013_path, sps_2013_sp, sps_2013_edition;
  local_var installs, install, path, prod;

  sps_2013_path = NULL;

  installs = get_installs(app_name:"Microsoft SharePoint Server");
  foreach install (installs[1])
  {
    if (install['Product'] == "2007")
    {
      sps_2007_path = install['path'];
      sps_2007_sp = install['SP'];
      sps_2007_edition = install['Edition'];
    }
    else 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'];
      break;
    }
  }

  ######################################################################
  # SharePoint Server 2007 SP3
  ######################################################################
  if (sps_2007_path && sps_2007_sp == "3" && sps_2007_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2007_path, value:"Bin");
    if (hotfix_check_fversion(file:"Microsoft.Office.InfoPath.Server.dll", version:"12.0.6732.5000", path:path, bulletin:bulletin, kb:"2596670", product:"Microsoft SharePoint Server 2007 SP3") == 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:"Microsoft.Office.InfoPath.Server.dll", version:"14.0.7159.5000", path:path, bulletin:bulletin, kb:"2553405", product:"Microsoft SharePoint Server 2010 SP2") == HCF_OLDER)
      vuln = TRUE;
  }

  ######################################################################
  # SharePoint Server 2013
  ######################################################################
  if (sps_2013_path)
  {
    if ("Server" >< sps_2013_edition && sps_2013_sp == "1")
    {
      prod = "SharePoint Server 2013 SP1";
      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:"15.0.4763.1000", path:path, bulletin:bulletin, kb:"3085567", product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
    else if ("Foundation" >< sps_2013_edition && sps_2013_sp == "1")
    {
      prod = "SharePoint Foundation 2013 SP1";
      prod = "SharePoint Foundation 2013";
      path = hotfix_append_path(path:hotfix_get_commonfilesdir(), value:"Microsoft Shared\Web Server Extensions\15\BIN\");
      if (hotfix_check_fversion(file:"CsiSrv.dll", version:"15.0.4763.1000", path:path, bulletin:bulletin, kb:"3085582", product:prod) == HCF_OLDER)
        vuln = TRUE;
    }
  }

  # Office Services and Web Apps
  ######################################################################
  # SharePoint Server 2007 SP3 - Excel Services
  ######################################################################
  if (sps_2007_path && sps_2007_sp == "3" && sps_2007_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2007_path, value:"Bin");
    if (hotfix_check_fversion(file:"xlsrv.dll", version:"12.0.6732.5000", path:path, bulletin:bulletin, kb:"3054994", product:"Office SharePoint Server 2007 Excel Services") == HCF_OLDER)
      vuln = TRUE;
  }

  ######################################################################
  # SharePoint Server 2010 SP2 - Excel Services
  ######################################################################
  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:"14.0.7159.5000", path:path, bulletin:bulletin, kb:"3085596", product:"Office SharePoint Server 2010 Excel Services") == HCF_OLDER)
      vuln = TRUE;
  }

  ######################################################################
  # SharePoint Server 2013 SP1 - Excel Services
  ######################################################################
  if (sps_2013_path && sps_2013_sp == "1" && sps_2013_edition == "Server")
  {
    path = hotfix_append_path(path:sps_2013_path, value:"Bin");
    if (hotfix_check_fversion(file:"xlsrv.dll", version:"15.0.4763.1000", path:path, bulletin:bulletin, kb:"3085568", product:"Office SharePoint Server 2013 Excel Services") == HCF_OLDER)
      vuln = TRUE;
  }
}

######################################################################
# Office Web Apps
######################################################################
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"];
      }
      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:"14.0.7160.5000", min_version:"14.0.7015.1000", path:path, bulletin:bulletin, kb:"3085520", product:"Office Web Apps 2010") == HCF_OLDER)
      vuln = TRUE;
    path = hotfix_append_path(path:owa_2010_path, value:"14.0\Bin");
    if (hotfix_check_fversion(file:"xlsrv.dll", version:"14.0.7159.5000", min_version:"14.0.7015.1000", path:path, bulletin:bulletin, kb:"3085595", product:"Excel Web App 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:"ExcelServicesEcs\bin");
    if (hotfix_check_fversion(file:"xlsrv.dll", version:"15.0.4763.1000", min_version:"15.0.4571.1500", path:path, bulletin:bulletin, kb:"3085571", product:"Office Web Apps 2013") == HCF_OLDER)
      vuln = TRUE;
  }
}

# Individual and odd ball office products
function perform_office_product_checks()
{
  local_var excel_checks, vwr_checks, compat_checks, kb;

  local_var installs, install, path; # For DLL checks

  ######################################################################
  # Excel Checks
  ######################################################################
  excel_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6732.5000", "kb", "3085615"),
    "14.0", make_array("sp", 2, "version", "14.0.7160.5000", "kb", "3085609"),
    "15.0", make_array("sp", 1, "version", "15.0.4763.1000", "kb", "3085583"),
    "16.0", make_array("sp", 0, "version", "16.0.4288.1000", "channel", "MSI", "kb", "2920693")
  );
  if (hotfix_check_office_product(product:"Excel", checks:excel_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Excel Viewer
  ######################################################################
  vwr_checks = make_array(
    "12.0", make_array("version", "12.0.6732.5000", "kb", "3085619")
  );
  if (hotfix_check_office_product(product:"ExcelViewer", display_name:"Excel Viewer", checks:vwr_checks, bulletin:bulletin))
    vuln = TRUE;

  ######################################################################
  # Excel Compatibility pack
  ######################################################################
  compat_checks = make_array(
    "12.0", make_array("sp", 3, "version", "12.0.6723.5000", "kb", "3085618")
  );
  if (hotfix_check_office_product(product:"ExcelCnv", display_name:"Office Compatibility Pack SP3", checks:compat_checks, bulletin:bulletin))
    vuln = TRUE;
}

function perform_visio_checks()
{
  local_var installs,install,share,path,version;

  # Preconditions
  installs = get_kb_list("SMB/Office/Visio/*/VisioPath");
  if(isnull(installs))
    return;

  share = hotfix_path2share(path:path);
  if(!is_accessible_share(share:share))
    return;

  # Visio checks
  foreach install (keys(installs))
  {
    version = install - 'SMB/Office/Visio/' - '/VisioPath';
    if ("14.0" >!< version && "12.0" >!< version)
      continue;
    path = installs[install];
    if ("14.0" >< version && hotfix_is_vulnerable(path:path, file:"Visio.exe", version:"14.0.7160.5000", min_version:"14.0.6500.0", bulletin:bulletin, kb:"3085514"))
      vuln = TRUE;
    if ("12.0" >< version && hotfix_is_vulnerable(path:path, file:"Visio.exe", version:"12.0.6727.5000", min_version:"12.0.6000.0", bulletin:bulletin, kb:"3085542"))
      vuln = TRUE;
  }
}

perform_sharepoint_checks();
perform_owa_checks();
perform_office_product_checks();
perform_visio_checks();

if (vuln)
{
  set_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