OpenTTD 'NetworkSyncCommandQueue()' Denial of Service Vulnerability

###############################################################################
# OpenVAS Vulnerability Test
# $Id: secpod_openttd_dos_vuln.nasl 5368 2017-02-20 14:34:16Z cfi $
#
# OpenTTD 'NetworkSyncCommandQueue()' Denial of Service Vulnerability
#
# Authors:
# Sooraj KS <[email protected]>
#
# Copyright:
# Copyright (c) 2010 SecPod, http://www.secpod.com
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2
# (or any later version), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

tag_impact = "Successful exploitation will allow remote attackers to cause the application
  to fall into an infinite loop, denying service to legitimate users.
  Impact Level: Application";
tag_affected = "OpenTTD version 1.0.2 and prior.";
tag_insight = "The flaw is due to the 'NetworkSyncCommandQueue()' function in
  'src/network/network_command.cpp' not properly resetting the 'next' pointer,
  which can be exploited to trigger an endless loop and exhaust CPU resources
  when joining a server.";
tag_solution = "Upgrade to the latest version of OpenTTD 1.0.3 or later,
  For updates refer to http://www.openttd.org";
tag_summary = "This host is installed with OpenTTD and is prone to denial of
  service vulnerability.";

if(description)
{
  script_id(901136);
  script_version("$Revision: 5368 $");
  script_tag(name:"last_modification", value:"$Date: 2017-02-20 15:34:16 +0100 (Mon, 20 Feb 2017) $");
  script_tag(name:"creation_date", value:"2010-08-02 12:38:17 +0200 (Mon, 02 Aug 2010)");
  script_bugtraq_id(41804);
  script_cve_id("CVE-2010-2534");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_name("OpenTTD 'NetworkSyncCommandQueue()' Denial of Service Vulnerability");
  script_xref(name : "URL" , value : "http://secunia.com/advisories/40630");
  script_xref(name : "URL" , value : "http://xforce.iss.net/xforce/xfdb/60568");
  script_xref(name : "URL" , value : "http://security.openttd.org/en/CVE-2010-2534");
  script_xref(name : "URL" , value : "http://www.vupen.com/english/advisories/2010/1888");

  script_tag(name:"qod_type", value:"registry");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 SecPod");
  script_family("Denial of Service");
  script_dependencies("secpod_reg_enum.nasl");
  script_mandatory_keys("SMB/WindowsVersion");
  script_require_ports(139, 445);
  script_tag(name : "impact" , value : tag_impact);
  script_tag(name : "affected" , value : tag_affected);
  script_tag(name : "insight" , value : tag_insight);
  script_tag(name : "solution" , value : tag_solution);
  script_tag(name : "summary" , value : tag_summary);
  exit(0);
}


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

if(!get_kb_item("SMB/WindowsVersion")){
  exit(0);
}

## Get version from Registry
key = "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OpenTTD";
ver = registry_get_sz(key:key, item:"DisplayVersion");

if(ver)
{
  ## Check for version before 1.0.3
  if(version_is_less(version: ver, test_version: "1.0.3")){
    security_message(0);
  }
}