Microsoft Windows Active Directory SPN Denial of Service (2478953)

# 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("1.3.6.1.4.1.25623.1.0.902290");
  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:"2011-02-09 17:14:46 +0100 (Wed, 09 Feb 2011)");
  script_cve_id("CVE-2011-0040");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_name("Microsoft Windows Active Directory SPN Denial of Service (2478953)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/2478953");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2011/0319");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_reg_enum.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/registry_enumerated");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers to cause a denial of service.");

  script_tag(name:"affected", value:"Microsoft Windows Server 2003 Service Pack 2 and prior.");

  script_tag(name:"insight", value:"The flaw is due to an error in Active Directory that does not properly
  process specially crafted requests to update the service principal name (SPN).");

  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 MS11-005.");

  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(win2003:3) <= 0){
  exit(0);
}

if(!registry_key_exists(key:"SYSTEM\CurrentControlSet\Services\NTDS")){
  exit(0);
}

## MS11-005 Hotfix (2478953)
if(hotfix_missing(name:"2478953") == 0){
  exit(0);
}

sysPath = smb_get_systemroot();
if(!sysPath ){
  exit(0);
}

sysVer = fetch_file_version(sysPath:sysPath, file_name:"system32\Ntdsa.dll");
if(!sysVer){
  exit(0);
}

if(hotfix_check_sp(win2003:3) > 0)
{
  SP = get_kb_item("SMB/Win2003/ServicePack");
  if("Service Pack 2" >< SP)
  {
     if(version_is_less(version:sysVer, test_version:"5.2.3790.4808")){
       report = report_fixed_ver(installed_version:sysVer, fixed_version:"5.2.3790.4808", install_path:sysPath);
       security_message(port: 0, data: report);
     }
     exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}