MS13-050: Vulnerability in Windows Print Spooler Components Could Allow Elevation of Privilege (2839894)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(66866);
  script_version("1.7");
  script_cvs_date("Date: 2018/11/15 20:50:31");

  script_cve_id("CVE-2013-1339");
  script_bugtraq_id(60407);
  script_xref(name:"MSFT", value:"MS13-050");
  script_xref(name:"MSKB", value:"2839894");
  script_xref(name:"IAVA", value:"2013-A-0120");

  script_name(english:"MS13-050: Vulnerability in Windows Print Spooler Components Could Allow Elevation of Privilege (2839894)");
  script_summary(english:"Checks version of win32spl.dll");

  script_set_attribute(
    attribute:"synopsis",
    value:
"The remote Windows host is potentially affected by a privilege
escalation vulnerability."
  );
  script_set_attribute(
    attribute:"description",
    value:
"The remote Windows host is potentially affected by a vulnerability that
could allow elevation of privilege when an authenticated attacker
deletes a printer connection.  An attacker who is able to successfully
exploit the vulnerability could run arbitrary code on a user's system
with system privileges.  In order to exploit this issue, an attacker
must have valid login credentials."
  );
  script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2013/ms13-050");
  script_set_attribute(
    attribute:"solution",
    value:
"Microsoft has released a set of patches for Windows Vista, 2008, 7,
2008 R2, 8, and 2012."
  );
  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_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:"2013/06/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/06/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/06/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2013-2018 Tenable Network Security, Inc.");

  script_dependencies("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_hotfixes_fcheck.inc");
include("smb_hotfixes.inc");
include("smb_func.inc");
include("smb_reg_query.inc");
include("misc_func.inc");

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS13-050";
kb = "2839894";

kbs = make_list(kb);
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");
get_kb_item_or_exit('SMB/WindowsVersion', exit_code:1);

if (hotfix_check_sp_range(vista:'2',win7:'1',win8:'0') <= 0) audit(AUDIT_OS_SP_NOT_VULN);

rootfile = hotfix_get_systemroot();
if (!rootfile) exit(1, "Failed to get the system root.");

share = hotfix_path2share(path:rootfile);
if (!is_accessible_share(share:share)) audit(AUDIT_SHARE_FAIL, share);

if (hotfix_check_server_core() == 1)
{
  #check to see if Printing-ServerCore-Role is enabled
  registry_init();
  hcf_init = TRUE;
  hklm = registry_hive_connect(hive:HKEY_LOCAL_MACHINE, exit_on_fail:TRUE);
  dval = get_registry_value(handle:hklm, item:"SOFTWARE\Policies\Microsoft\Windows NT\Printers\RegisterSpoolerRemoteRpcEndPoint");
  RegCloseKey(handle:hklm);
  close_registry(close:FALSE);

  # if dval == 0, then the system is not vulnerable
  if (!dval) audit(AUDIT_HOST_NOT, 'affected');
}

if (
  # Windows 8 / Windows Server 2012
  hotfix_is_vulnerable(os:"6.2", sp:0, file:"win32spl.dll", version:"6.2.9200.20702", min_version:"6.2.9200.20000", dir:"\system32", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.2", sp:0, file:"win32spl.dll", version:"6.2.9200.16598", min_version:"6.2.9200.16000", dir:"\system32", bulletin:bulletin, kb:kb) ||

  # Windows 7 and Windows Server 2008 R2
  hotfix_is_vulnerable(os:"6.1", sp:1, file:"win32spl.dll", version:"6.1.7601.22311", min_version:"6.1.7601.21000", dir:"\system32", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.1", sp:1, file:"win32spl.dll", version:"6.1.7601.18142", min_version:"6.1.7600.17000", dir:"\system32", bulletin:bulletin, kb:kb) ||

  # Vista / Windows Server 2008
  hotfix_is_vulnerable(os:"6.0", sp:2, file:"win32spl.dll", version:"6.0.6002.23103", min_version:"6.0.6002.23000", dir:"\system32", bulletin:bulletin, kb:kb) ||
  hotfix_is_vulnerable(os:"6.0", sp:2, file:"win32spl.dll", version:"6.0.6002.18832", min_version:"6.0.6002.18000", dir:"\system32", bulletin:bulletin, kb:kb)
)
{
  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');
}