Internet Explorer Vector Markup Language Remote Code Execution Vulnerability (2544521)

# SPDX-FileCopyrightText: 2011 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900290");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2011-06-15 15:55:00 +0200 (Wed, 15 Jun 2011)");
  script_cve_id("CVE-2011-1266");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_name("Internet Explorer Vector Markup Language Remote Code Execution Vulnerability (2544521)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/2530548");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/48173");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-052");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("gb_ms_ie_detect.nasl");
  script_mandatory_keys("MS/IE/Version");
  script_require_ports(139, 445);

  script_tag(name:"impact", value:"Successful exploitation could allow remote attackers to execute arbitrary
  code in the context of the application.");

  script_tag(name:"affected", value:"Microsoft Internet Explorer version 6.x/7.x/8.x.");

  script_tag(name:"insight", value:"The flaw is caused when Internet Explorer attempts to access an object that
  has not been initialised or has been deleted causing memory corruption.");

  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");

  script_tag(name:"summary", value:"This host is missing a critical security update according to
  Microsoft Bulletin MS11-052.");

  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");

if(hotfix_check_sp(xp:4, win2003:3, winVista:3, win2008:3, win7:2) <= 0){
  exit(0);
}

ieVer = get_kb_item("MS/IE/Version");
if(!ieVer || ieVer !~ "^[6-8]\."){
  exit(0);
}

## MS11-052 Hotfix (2544521)
if(hotfix_missing(name:"2544521") == 0){
  exit(0);
}

progDir = registry_get_sz(key:"SOFTWARE\Microsoft\Windows\CurrentVersion\",
                                                   item:"ProgramFilesDir");
if(!progDir){
  exit(0);
}

dllVer = fetch_file_version(sysPath:progDir, file_name:"Common Files\Mi" +
                                             "crosoft Shared\VGX\Vgx.dll");
if(!dllVer){
  exit(0);
}

if(hotfix_check_sp(xp:4) > 0)
{
  SP = get_kb_item("SMB/WinXP/ServicePack");
  if("Service Pack 3" >< SP)
  {
    if(version_in_range(version:dllVer, test_version:"6.0.2900.0000", test_version2:"6.0.2900.6107") ||
       version_in_range(version:dllVer, test_version:"7.0.0000.00000", test_version2:"7.0.6000.21300")||
       version_in_range(version:dllVer, test_version:"8.0.6001.00000", test_version2:"8.0.6001.23166")){
      security_message( port: 0, data: "The target host was found to be vulnerable" );
    }
    exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}

else if(hotfix_check_sp(win2003:3) > 0)
{
  SP = get_kb_item("SMB/Win2003/ServicePack");
  if("Service Pack 2" >< SP)
  {
    if(version_in_range(version:dllVer, test_version:"6.0.3790.0000", test_version2:"6.0.3790.4860") ||
       version_in_range(version:dllVer, test_version:"7.0.0000.00000", test_version2:"7.0.6000.21300")||
       version_in_range(version:dllVer, test_version:"8.0.6001.00000", test_version2:"8.0.6001.23166")){
      security_message( port: 0, data: "The target host was found to be vulnerable" );
    }
    exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}

else if(hotfix_check_sp(winVista:3, win2008:3) > 0)
{
  SP = get_kb_item("SMB/WinVista/ServicePack");

  if(!SP) {
    SP = get_kb_item("SMB/Win2008/ServicePack");
  }

  if("Service Pack 1" >< SP)
  {
    if(version_in_range(version:dllVer, test_version:"7.0.6001.18000", test_version2:"7.0.6001.18644")||
       version_in_range(version:dllVer, test_version:"7.0.6001.22000", test_version2:"7.0.6001.22910")||
       version_in_range(version:dllVer, test_version:"8.0.6001.19000", test_version2:"8.0.6001.19075")||
       version_in_range(version:dllVer, test_version:"8.0.6001.23000", test_version2:"8.0.6001.23168")){
      security_message( port: 0, data: "The target host was found to be vulnerable" );
    }
    exit(0);
  }

  if("Service Pack 2" >< SP)
  {
    if(version_in_range(version:dllVer, test_version:"7.0.6002.18000", test_version2:"7.0.6002.18462")||
       version_in_range(version:dllVer, test_version:"7.0.6002.22000", test_version2:"7.0.6002.22633")||
       version_in_range(version:dllVer, test_version:"8.0.6001.19000", test_version2:"8.0.6001.19075")||
       version_in_range(version:dllVer, test_version:"8.0.6001.23000", test_version2:"8.0.6001.23168")){
      security_message( port: 0, data: "The target host was found to be vulnerable" );
    }
    exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}

else if(hotfix_check_sp(win7:2) > 0)
{
  if(version_in_range(version:dllVer, test_version:"8.0.7600.16000", test_version2:"8.0.7600.16805")||
     version_in_range(version:dllVer, test_version:"8.0.7600.20000", test_version2:"8.0.7600.20956")||
     version_in_range(version:dllVer, test_version:"8.0.7601.17000", test_version2:"8.0.7601.17607")||
     version_in_range(version:dllVer, test_version:"8.0.7601.21000", test_version2:"8.0.7601.21717")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
}