Microsoft Windows DNS Client Spoofing Vulnerability (MS08-020, 945553)

# SPDX-FileCopyrightText: 2008 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("1.3.6.1.4.1.25623.1.0.90020");
  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:"2008-09-03 22:30:27 +0200 (Wed, 03 Sep 2008)");
  script_tag(name:"cvss_base", value:"8.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2024-02-14 16:54:54 +0000 (Wed, 14 Feb 2024)");
  script_cve_id("CVE-2008-0087");
  script_name("Microsoft Windows DNS Client Spoofing Vulnerability (MS08-020, 945553)");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2008/ms08-020");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/28553");

  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"executable_version");
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_reg_enum.nasl");
  script_mandatory_keys("SMB/registry_enumerated");
  script_require_ports(139, 445);
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"solution", value:"All Users should upgrade to the latest version.");
  script_tag(name:"summary", value:"The remote host is probably affected by the vulnerability described in
  CVE-2008-0087");
  script_tag(name:"impact", value:"The DNS client in Microsoft Windows 2000 SP4, XP SP2, Server 2003 SP1 and SP2,
  and Vista uses predictable DNS transaction IDs, which allows remote attackers
  to spoof DNS responses.");
  exit(0);
}

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

if(hotfix_check_sp(xp:3, win2k:5, win2003:3) <= 0){
  exit(0);
}

# MS08-020 Hotfix check
if(hotfix_missing(name:"945553") == 0){
  exit(0);
}

dllPath = registry_get_sz(key:"SOFTWARE\Microsoft\COM3\Setup",
                          item:"Install Path");
if(!dllPath){
  exit(0);
}

share = ereg_replace(pattern:"([A-Z]):.*", replace:"\1$", string:dllPath);
file = ereg_replace(pattern:"[A-Z]:(.*)", replace:"\1",
                    string:dllPath + "\Dnsapi.dll");

dllVer = GetVer(file:file, share:share);
if(!dllVer){
  exit(0);
}

if(hotfix_check_sp(win2k:5) > 0)
{
  if(version_is_less(version:dllVer, test_version:"5.0.2195.7151")){
    report = report_fixed_ver(installed_version:dllVer, fixed_version:"5.0.2195.7151");
    security_message(port: 0, data: report);
  }
}

else if(hotfix_check_sp(xp:3) > 0)
{
  if(version_is_less(version:dllVer, test_version:"5.1.2600.3316")){
    report = report_fixed_ver(installed_version:dllVer, fixed_version:"5.1.2600.3316");
    security_message(port: 0, data: report);
  }
}

else if(hotfix_check_sp(win2003:3) > 0)
{
  SP = get_kb_item("SMB/Win2003/ServicePack");
  if("Service Pack 2" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"5.2.3790.4238")){
      report = report_fixed_ver(installed_version:dllVer, fixed_version:"5.2.3790.4238");
      security_message(port: 0, data: report);
    }
   exit(0);
  }
  if("Service Pack 1" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"5.2.3790.3092")){
      report = report_fixed_ver(installed_version:dllVer, fixed_version:"5.2.3790.3092");
      security_message(port: 0, data: report);
    }
   exit(0);
  }
  security_message( port: 0, data: "The target host was found to be vulnerable" );
}