WinFTP Server <= 2.3.0 PASV Command DoS Vulnerability

# 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-or-later

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900450");
  script_version("2023-03-23T10:19:31+0000");
  script_tag(name:"last_modification", value:"2023-03-23 10:19:31 +0000 (Thu, 23 Mar 2023)");
  script_tag(name:"creation_date", value:"2008-12-26 14:23:17 +0100 (Fri, 26 Dec 2008)");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:N/A:P");
  script_cve_id("CVE-2008-5666");
  script_name("WinFTP Server <= 2.3.0 PASV Command DoS Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");

  script_xref(name:"URL", value:"http://secunia.com/advisories/32209");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/31686");
  script_xref(name:"URL", value:"http://www.milw0rm.com/exploits/6717");

  script_tag(name:"summary", value:"WinFTP Server is prone to a denial of service (DoS)
  vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The flaw is due to an error when handling the PASV and NLST
  commands. These can be exploited through sending multiple login requests ending with a PASV
  command.");

  script_tag(name:"impact", value:"Successful exploitation will let the user crash the application
  to cause denial of service.");

  script_tag(name:"affected", value:"Win FTP Server version 2.3.0 and prior.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_tag(name:"qod_type", value:"registry");
  script_tag(name:"solution_type", value:"WillNotFix");

  exit(0);
}

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

key = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\WinFtp Server_is1";
if(!registry_key_exists(key:key))
  exit(0);

regKey = registry_get_sz(key:key, item:"DisplayName");
if(!regKey || "WinFtp Server" >!< regKey)
  exit(0);

winftpVer = eregmatch(pattern:"WinFtp Server ([0-9.]+)", string:regKey);
if(version_is_less_equal(version:winftpVer[1], test_version:"2.3.0")) {
  report = report_fixed_ver(installed_version:winftpVer, fixed_version:"WillNotFix");
  security_message(port:0, data:report);
  exit(0);
}

exit(99);