TheGreenBow IPSec VPN Client Denial Of Service Vulnerability

# 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("1.3.6.1.4.1.25623.1.0.900922");
  script_version("2025-03-05T05:38:52+0000");
  script_tag(name:"last_modification", value:"2025-03-05 05:38:52 +0000 (Wed, 05 Mar 2025)");
  script_tag(name:"creation_date", value:"2009-08-26 14:01:08 +0200 (Wed, 26 Aug 2009)");
  script_tag(name:"cvss_base", value:"2.1");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:N/I:N/A:P");
  script_cve_id("CVE-2009-2918");
  script_name("TheGreenBow IPSec VPN Client Denial Of Service Vulnerability");
  script_xref(name:"URL", value:"http://secunia.com/advisories/36332/");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2009/2294");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/archive/1/505816/100/0/threaded");

  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"registry");
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("secpod_thegreenbow_ipsec_vpn_client_detect.nasl");
  script_mandatory_keys("TheGreenBow-IPSec-VPN-Client/Ver");
  script_tag(name:"impact", value:"Attackers can exploit this issue via crafted requests to
x80000034 IOCTL probably involving an input or output buffer size of 0 to cause
denial of service.");
  script_tag(name:"affected", value:"TheGreenBow IPSec VPN Client version 4.61.003 and prior on
Windows.");
  script_tag(name:"insight", value:"The flaw is due to a NULL-pointer dereference error in
'tgbvpn.sys' driver when processing x80000034 IOCTLs.");
  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:"summary", value:"TheGreenBow IPSec VPN Client is prone to a denial of service (DoS) vulnerability.");
  script_tag(name:"solution_type", value:"WillNotFix");
  exit(0);
}

include("version_func.inc");

vpnPort = 500;
if(!get_udp_port_state(vpnPort)){
  exit(0);
}

vpnVer = get_kb_item("TheGreenBow-IPSec-VPN-Client/Ver");
if(!vpnVer){
  exit(0);
}

if(version_is_less_equal(version:vpnVer, test_version:"4.6.1.3")){
  security_message(port:vpnPort, proto:"udp");
}