Microsoft IIS FTP Service Remote Code Execution Vulnerabilities (975254)

# SPDX-FileCopyrightText: 2009 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("1.3.6.1.4.1.25623.1.0.900874");
  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:"2009-10-15 15:35:39 +0200 (Thu, 15 Oct 2009)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_cve_id("CVE-2009-2521", "CVE-2009-3023");
  script_name("Microsoft IIS FTP Service Remote Code Execution Vulnerabilities (975254)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 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_xref(name:"URL", value:"http://support.microsoft.com/kb/975254");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/36189");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/36273");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2009/2542");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2009/2481");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-053");

  script_tag(name:"impact", value:"Successful exploitation will let the attacker execute arbitrary code with
  SYSTEM privileges which may result Denial of Service on the affected server.");

  script_tag(name:"affected", value:"Microsoft Internet Information Services (IIS) 5.0/5/1/6.0.");

  script_tag(name:"insight", value:"- This issue is caused by an error when processing directory listing commands
  including the '*' character and '../' sequences, which could be exploited to exhaust the stack.

  - An heap-based buffer overflow error occurs in the FTP service when processing
  a specially crafted 'NLST' command.");

  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 MS09-053.");

  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, win2k:5, win2003:3, winVista:3, win2008:3) <= 0){
  exit(0);
}

# MS09-053 Hotfix check
if((hotfix_missing(name:"975254") == 0)){
  exit(0);
}

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

dllVer = fetch_file_version(sysPath:sysPath, file_name:"system32\inetsrv\ftpsvc2.dll");
if(!dllVer){
  exit(0);
}

if(hotfix_check_sp(win2k:5) > 0)
{
  if(version_is_less(version:dllVer, test_version:"5.0.2195.7336"))
  {
    security_message(21);
    exit(0);
  }
}

if(hotfix_check_sp(xp:4) > 0)
{
  SP = get_kb_item("SMB/WinXP/ServicePack");
  if("Service Pack 2" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"6.0.2600.3624")){
      security_message(21);
    }
    exit(0);
  }
  else if("Service Pack 3" >< SP)
  {
    if(version_is_less(version:dllVer, test_version:"6.0.2600.5875")){
     security_message(21);
    }
    exit(0);
  }
  security_message(21);
}

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:"6.0.3790.4584")){
      security_message(21);
    }
    exit(0);
  }
  security_message(21);
}

else if(hotfix_check_sp(winVista:3, win2008:3) > 0)
{
  if(version_in_range(version:dllVer, test_version:"7.0.6000.16000", test_version2:"7.0.6000.16922") ||
     version_in_range(version:dllVer, test_version:"7.0.6000.20000", test_version2:"7.0.6000.21122"))
  {
    security_message( port: 0, data: "The target host was found to be vulnerable" );
    exit(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:"7.0.6001.18326") ||
       version_in_range(version:dllVer, test_version:"7.0.6001.22000", test_version2:"7.0.6001.22515"))
    {
      security_message( port: 0, data: "The target host was found to be vulnerable" );
      exit(0);
    }
  }

  if("Service Pack 1" >< SP)
  {
    if(version_in_range(version:dllVer, test_version:"7.0.6002.18000", test_version2:"7.0.6002.18106") ||
       version_in_range(version:dllVer, test_version:"7.0.6002.22000", test_version2:"7.0.6002.22218"))
    {
      security_message( port: 0, data: "The target host was found to be vulnerable" );
      exit(0);
    }
  }
}