Memcached 1.6.x < 1.6.2 DoS Vulnerability

# Copyright (C) 2020 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:memcached:memcached";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108730");
  script_version("2021-07-07T02:00:46+0000");
  script_tag(name:"last_modification", value:"2021-07-07 02:00:46 +0000 (Wed, 07 Jul 2021)");
  script_tag(name:"creation_date", value:"2020-03-24 09:30:42 +0000 (Tue, 24 Mar 2020)");
  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:"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:"2020-03-27 19:48:00 +0000 (Fri, 27 Mar 2020)");
  script_cve_id("CVE-2020-10931");

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

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

  script_name("Memcached 1.6.x < 1.6.2 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_memcached_detect.nasl", "gb_memcached_detect_udp.nasl");
  script_mandatory_keys("memcached/detected");

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

  script_tag(name:"insight", value:"The remote DoS (segfault) flaw exists in the code used to parse
  the binary protocol header that was introduced in 1.6.0.");

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

  script_tag(name:"affected", value:"Memcached versions 1.6.x prior to 1.6.2.");

  script_tag(name:"solution", value:"Update to version 1.6.2 or later.");

  script_xref(name:"URL", value:"https://github.com/memcached/memcached/issues/629");
  script_xref(name:"URL", value:"https://github.com/memcached/memcached/wiki/ReleaseNotes162");

  exit(0);
}

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

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

if (!infos = get_app_version_and_proto(cpe: CPE, port: port))
  exit(0);

version = infos["version"];
proto = infos["proto"];

if (version_in_range(version: version, test_version: "1.6.0", test_version2: "1.6.1")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.6.2");
  security_message(port: port, proto: proto, data: report);
  exit(0);
}

exit(99);