ISC BIND DoS Vulnerability (CVE-2017-3137) - Linux

# 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("1.3.6.1.4.1.25623.1.0.146587");
  script_version("2021-09-06T14:01:33+0000");
  script_tag(name:"last_modification", value:"2021-09-06 14:01:33 +0000 (Mon, 06 Sep 2021)");
  script_tag(name:"creation_date", value:"2021-09-06 07:29:02 +0000 (Mon, 06 Sep 2021)");
  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:3.0/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:"2019-10-09 23:27:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2017-3137");

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

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

  script_name("ISC BIND DoS Vulnerability (CVE-2017-3137) - Linux");

  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", "os_detection.nasl");
  script_mandatory_keys("isc/bind/detected", "Host/runs_unixoide");

  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:"Mistaken assumptions about the ordering of records in the answer
  section of a response containing CNAME or DNAME resource records could lead to a situation in
  which named would exit with an assertion failure when processing a response in which records
  occurred in an unusual order.");

  script_tag(name:"impact", value:"A server which is performing recursion can be forced to exit with
  an assertion failure if it can be caused to receive a response containing CNAME or DNAME resource
  records with certain ordering. An attacker can cause a denial of service by exploiting this
  condition. Recursive resolvers are at highest risk, but authoritative servers are theoretically
  vulnerable if they perform recursion.");

  script_tag(name:"affected", value:"BIND 9.9.9-P6, 9.9.10b1 through 9.9.10rc1, 9.10.4-P6, 9.10.5b1
  through 9.10.5rc1, 9.11.0-P3, 9.11.1b1 through 9.11.1rc1 and 9.9.9-S8.");

  script_tag(name:"solution", value:"Update to version 9.9.9-P8, 9.9.10rc3, 9.10.4-P8, 9.10.5rc3,
  9.11.0-P5, 9.11.1rc3, 9.9.9-S10 or later.");

  script_xref(name:"URL", value:"https://kb.isc.org/docs/aa-01466");

  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 =~ "^9\.9\.9+s[0-9]") {
  if (version_is_equal(version: version, test_version: "9.9.9s8")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "9.9.9-S10", install_path: location);
    security_message(port: port, data: report, proto: proto);
    exit(0);
  }
} else {
  if (version_is_equal(version: version, test_version: "9.9.9p6")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "9.9.9-P8", install_path: location);
    security_message(port: port, data: report, proto: proto);
    exit(0);
  }

  if (version =~ "^9\.9\.10") {
    if (version_in_range(version: version, test_version: "9.9.10b1", test_version2: "9.9.10rc1")) {
      report = report_fixed_ver(installed_version: version, fixed_version: "9.9.10rc3", install_path: location);
      security_message(port: port, data: report, proto: proto);
      exit(0);
    }
  }

  if (version_is_equal(version: version, test_version: "9.10.4p6")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "9.10.4-P8", install_path: location);
    security_message(port: port, data: report, proto: proto);
    exit(0);
  }

  if (version =~ "^9\.10\.5") {
    if (version_in_range(version: version, test_version: "9.10.5b1", test_version2: "9.10.5rc1")) {
      report = report_fixed_ver(installed_version: version, fixed_version: "9.10.5rc3", install_path: location);
      security_message(port: port, data: report, proto: proto);
      exit(0);
    }
  }

  if (version_is_equal(version: version, test_version: "9.11.0p3")) {
    report = report_fixed_ver(installed_version: version, fixed_version: "9.11.0-P5", install_path: location);
    security_message(port: port, data: report, proto: proto);
    exit(0);
  }

  if (version =~ "^9\.11\.1") {
    if (version_in_range(version: version, test_version: "9.11.1b1", test_version2: "9.11.1rc1")) {
      report = report_fixed_ver(installed_version: version, fixed_version: "9.11.1rc3", install_path: location);
      security_message(port: port, data: report, proto: proto);
      exit(0);
    }
  }
}

exit(99);