ISC BIND DoS Vulnerability (CVE-2016-2088)

# Copyright (C) 2021 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:isc:bind";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117784");
  script_version("2021-11-18T03:03:46+0000");
  script_tag(name:"last_modification", value:"2021-11-18 03:03:46 +0000 (Thu, 18 Nov 2021)");
  script_tag(name:"creation_date", value:"2021-11-17 16:21:49 +0000 (Wed, 17 Nov 2021)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-07-01 01:29:00 +0000 (Sat, 01 Jul 2017)");

  script_cve_id("CVE-2016-2088");

  script_tag(name:"qod_type", value:"remote_banner_unreliable"); # nb: Only affected if DNS cookie support is enabled during build time

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

  script_name("ISC BIND DoS Vulnerability (CVE-2016-2088)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_isc_bind_consolidation.nasl");
  script_mandatory_keys("isc/bind/detected");

  script_tag(name:"summary", value:"ISC BIND 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:"insight", value:"BIND 9.10 has preliminary support for DNS cookies (or source
  identity tokens), a proposed mechanism designed to allow lightweight transaction security between
  a querying party and a nameserver. An error in the BIND code implementing support for this
  optional feature permits a deliberately misconstructed packet containing multiple cookie options
  to cause named to terminate with an INSIST assertion failure in resolver.c if DNS cookie support
  is enabled in the server. Only servers with DNS cookie support enabled at build time can be
  affected by this defect. In servers which do not have DNS cookie support selected, any cookies
  encountered will be ignored as unknown option types.");

  script_tag(name:"impact", value:"Servers which are built with DNS cookie support enabled are
  vulnerable to denial of service if an attacker can cause them to receive and process a response
  that contains multiple cookie options.");

  script_tag(name:"affected", value:"ISC BIND version 9.10.x through 9.10.3-P3.");

  script_tag(name:"solution", value:"Update to version 9.10.3-P4 or later.");

  script_xref(name:"URL", value:"https://kb.isc.org/docs/aa-01351");

  exit(0);
}

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

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

if (!infos = get_app_full(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

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

if (version_in_range(version: version, test_version: "9.10.0", test_version2: "9.10.3p3")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "9.10.3-P4", install_path: location);
  security_message(port: port, data: report, proto: proto);
  exit(0);
}

exit(99);