Cisco IOS XR Software Multicast Source Discovery Protocol Session Denial of Service Vulnerability

2017-07-06T00:00:00
ID OPENVAS:1361412562310106927
Type openvas
Reporter This script is Copyright (C) 2017 Greenbone Networks GmbH
Modified 2019-10-09T00:00:00

Description

A vulnerability in Multicast Source Discovery Protocol (MSDP) ingress packet processing for Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the MSDP session to be unexpectedly reset, causing a short denial of service (DoS) condition. The MSDP session will restart within a few seconds.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
#
# Cisco IOS XR Software Multicast Source Discovery Protocol Session Denial of Service Vulnerability
#
# Authors:
# Christian Kuersteiner <christian.kuersteiner@greenbone.net>
#
# Copyright:
# Copyright (c) 2017 Greenbone Networks GmbH
#
# 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("1.3.6.1.4.1.25623.1.0.106927");
  script_cve_id("CVE-2017-6731");
  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_version("2019-10-09T06:43:33+0000");

  script_name("Cisco IOS XR Software Multicast Source Discovery Protocol Session Denial of Service Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170705-iosxr");

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

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

  script_tag(name:"summary", value:"A vulnerability in Multicast Source Discovery Protocol (MSDP) ingress packet
processing for Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause the MSDP session to
be unexpectedly reset, causing a short denial of service (DoS) condition. The MSDP session will restart within a
few seconds.");

  script_tag(name:"insight", value:"The vulnerability is due to incorrect error handling of an MSDP packet that
contains an error in the packet header. An attacker could exploit this vulnerability by sending a malformed MSDP
packet for an established MSDP session to the targeted device.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause a short DoS condition if the
MSDP session restarts.");

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

  script_tag(name:"last_modification", value:"2019-10-09 06:43:33 +0000 (Wed, 09 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-07-06 10:55:30 +0700 (Thu, 06 Jul 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("This script is Copyright (C) 2017 Greenbone Networks GmbH");
  script_dependencies("gb_cisco_ios_xr_version.nasl");
  script_mandatory_keys("cisco/ios_xr/version");

  exit(0);
}

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

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

affected = make_list(
  '4.3.2',
  '6.0.2' );

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

exit(99);