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Security Update for Microsoft SharePoint Server 2016 (December 2017)

2017-12-12T00:00:00
ID SMB_NT_MS17_DEC_OFFICE_SHAREPOINT.NASL
Type nessus
Reporter Tenable
Modified 2018-08-03T00:00:00

Description

The Microsoft SharePoint Server or Microsoft Project Server installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :

  • An elevation of privilege vulnerability exists when Microsoft SharePoint Server does not properly sanitize a specially crafted web request to an affected SharePoint server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected SharePoint server. (CVE-2017-11936)

                                        
                                            #
# (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(105190);
  script_version("1.8");
  script_cvs_date("Date: 2018/08/03 11:35:09");

  script_cve_id("CVE-2017-11936");
  script_bugtraq_id(102068);
  script_xref(name:"MSKB", value:"4011576");
  script_xref(name:"MSFT", value:"MS17-4011576");
  script_xref(name:"IAVA", value:"2017-A-0363");

  script_name(english:"Security Update for Microsoft SharePoint Server 2016 (December 2017)");
  script_summary(english:"Checks for Microsoft security update.");

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

  - An elevation of privilege vulnerability exists when Microsoft
    SharePoint Server does not properly sanitize a specially crafted
    web request to an affected SharePoint server. An authenticated
    attacker could exploit the vulnerability by sending a specially
    crafted request to an affected SharePoint server.
    (CVE-2017-11936)");
  # https://support.microsoft.com/en-us/help/4011576/descriptionofthesecurityupdateforsharepointserver2016december12-2017
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5f43e5cb");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released security update KB4011576 to address this
issue.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/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:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/12");

  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:project_server");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");

  script_dependencies("microsoft_sharepoint_installed.nbin","smb_hotfixes.nasl","ms_bulletin_checks_possible.nasl","microsoft_office_compatibility_pack_installed.nbin");
  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 = "MS17-12";
kbs = make_list(
  '4011576'
);

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_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"] == "2016")
  {
    sps_2016_path = install['path'];
    sps_2016_sp = install['SP'];
    sps_2016_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:"16.0.4627.1000", min_version:"16.0.0.0", path:path, kb:"4011576", product:"Microsoft SharePoint Server 2016") == HCF_OLDER)
  {
    vuln = TRUE;
  }
}

if (vuln)
{
  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');
}
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