Microsoft Distributed File System Remote Code Execution Vulnerabilities (2535512)

# 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("1.3.6.1.4.1.25623.1.0.900288");
  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-2011-1868", "CVE-2011-1869");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_name("Microsoft Distributed File System Remote Code Execution Vulnerabilities (2535512)");
  script_xref(name:"URL", value:"http://support.microsoft.com/kb/2535512");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/48180");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/48187");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-042");

  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 could allow remote attacker to execute arbitrary
  code by creating a specially crafted DFS responses.");
  script_tag(name:"affected", value:"- Microsoft Windows 7

  - Microsoft Windows XP Service Pack 3 and prior

  - Microsoft Windows 2003 Service Pack 2 and prior

  - Microsoft Windows Vista Service Pack 1/2 and prior

  - Microsoft Windows Server 2008 Service Pack 1/2 and prior");
  script_tag(name:"insight", value:"The flaws are due to errors in Microsoft Distributed File System (DFS)
  implementation which fails to validates all fields within specially
  crafted DFS responses.");
  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 MS11-042.");
  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) == 1){
  file_name = "Mup.sys";
} else if(hotfix_check_sp(winVista:3, win2008:3, win7:1) == 1){
  file_name = "Dfsc.sys";
}else{
  exit(0);
}

## MS11-042 Hotfix (2535512)
if(hotfix_missing(name:"2535512") == 0){
  exit(0);
}

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

sysVer = fetch_file_version(sysPath:sysPath, file_name:"system32\drivers\" + file_name);
if(!sysVer){
  exit(0);
}

if(hotfix_check_sp(xp:4) > 0)
{
  SP = get_kb_item("SMB/WinXP/ServicePack");
  if("Service Pack 3" >< SP)
  {
    if(version_is_less(version:sysVer, test_version:"5.1.2600.6103")){
      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_is_less(version:sysVer, test_version:"5.2.3790.4851")){
      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:sysVer, test_version:"6.0.6001.18000", test_version2:"6.0.6001.18632")||
       version_in_range(version:sysVer, test_version:"6.0.6001.22000", test_version2:"6.0.6001.22898")){
      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:sysVer, test_version:"6.0.6002.18000", test_version2:"6.0.6002.18450")||
       version_in_range(version:sysVer, test_version:"6.0.6002.22000", test_version2:"6.0.6002.22624")){
      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(win7:1) > 0)
{
  if(version_in_range(version:sysVer, test_version:"6.1.7600.16000", test_version2:"6.1.7600.16803")||
     version_in_range(version:sysVer, test_version:"6.1.7600.20000", test_version2:"6.1.7600.20952")){
    security_message( port: 0, data: "The target host was found to be vulnerable" );
  }
}