Lighttpd < 1.4.66 DoS Vulnerability

# Copyright (C) 2022 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:lighttpd:lighttpd";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.124151");
  script_version("2023-10-18T05:05:17+0000");
  script_tag(name:"last_modification", value:"2023-10-18 05:05:17 +0000 (Wed, 18 Oct 2023)");
  script_tag(name:"creation_date", value:"2022-09-13 08:03:33 +0000 (Tue, 13 Sep 2022)");
  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:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-09-15 04:08:00 +0000 (Thu, 15 Sep 2022)");

  script_cve_id("CVE-2022-37797");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

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

  script_name("Lighttpd < 1.4.66 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2022 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("sw_lighttpd_http_detect.nasl");
  script_mandatory_keys("lighttpd/detected");

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

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"impact", value:"In lighttpd, mod_wstunnel does not initialize a handler function
  pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer
  dereference which crashes the server. It could be used by an external attacker to cause denial
  of service condition.");

  script_tag(name:"affected", value:"Lighttpd version 1.4.65 and prior.");

  script_tag(name:"solution", value:"Update to version 1.4.66 or later.");

  script_xref(name:"URL", value:"https://redmine.lighttpd.net/issues/3165");
  script_xref(name:"URL", value:"https://www.lighttpd.net/2022/8/7/1.4.66/");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!version = get_app_version(cpe: CPE, port: port))
  exit(0);

if (version_is_less(version: version, test_version: "1.4.66")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.4.66");
  security_message(port: port, data: report);
  exit(0);
}

exit(99);