Cisco Carrier Routing System IPv6 Denial of Service Vulnerability (cisco-sa-20160914-crs)

# Copyright (C) 2016 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:/o:cisco:ios_xr";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106256");
  script_version("2022-09-23T10:10:45+0000");
  script_tag(name:"last_modification", value:"2022-09-23 10:10:45 +0000 (Fri, 23 Sep 2022)");
  script_tag(name:"creation_date", value:"2016-09-16 11:53:36 +0700 (Fri, 16 Sep 2016)");
  script_tag(name:"cvss_base", value:"5.7");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:M/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:A/AC:H/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:"2017-07-30 01:29:00 +0000 (Sun, 30 Jul 2017)");

  script_cve_id("CVE-2016-6401");

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

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

  script_name("Cisco Carrier Routing System IPv6 Denial of Service Vulnerability (cisco-sa-20160914-crs)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone Networks GmbH");
  script_family("CISCO");
  script_dependencies("gb_cisco_ios_xr_consolidation.nasl");
  script_mandatory_keys("cisco/ios_xr/detected", "cisco/ios_xr/model");

  script_tag(name:"summary", value:"A vulnerability in IPv6 over MPLS packet processing of Cisco
  IOS XR for Cisco Carrier Routing System (CRS) platforms could allow an unauthenticated, adjacent
  attacker to cause a reload of the affected line card.");

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

  script_tag(name:"insight", value:"The vulnerability is due to insufficient logic in processing of
  crafted IPv6 over MPLS packets. An attacker could exploit this vulnerability by sending a crafted
  IPv6 over MPLS packet to be processed by an affected device.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause a reload of the
  affected line card.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160914-crs");

  exit(0);
}

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

if (!model = get_kb_item("cisco/ios_xr/model"))
  exit(0);

if (model !~ "^CRS-")
  exit(99);

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

if (version == "5.1.4") {
  report = report_fixed_ver(installed_version: version, fixed_version: "See advisory");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);