Cisco IOS XR LPTS Denial of Service Vulnerability (/cisco-sa-20160519-ios-xr)

# 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("1.3.6.1.4.1.25623.1.0.105729");
  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:"2016-05-23 14:24:54 +0200 (Mon, 23 May 2016)");
  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:"2016-12-01 03:05:00 +0000 (Thu, 01 Dec 2016)");

  script_cve_id("CVE-2016-1407");

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

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

  script_name("Cisco IOS XR LPTS Denial of Service Vulnerability (/cisco-sa-20160519-ios-xr)");

  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");

  script_tag(name:"summary", value:"A vulnerability in the Local Packet Transport Services (LPTS)
  network stack of Cisco IOS XR for Cisco ASR 9000 Series Aggregation Services Routers could allow
  an unauthenticated, remote attacker to cause a limited denial of service (DoS) condition on an
  affected platform.");

  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 improper handling of flow base
  entries by LPTS. This can cause too many known entries for a protocol to be created, causing
  existing or new sessions to be dropped. An attacker could exploit this vulnerability by sending
  continuous connection attempts to the open TCP ports to cause an exhaustion of services.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause a limited DoS
  condition on an affected platform.");

  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-20160519-ios-xr");

  exit(0);
}

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

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

if( "ASR9" >!< model )
  exit( 99 );

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

affected = make_list(
  '2.0.0',
  '3.0.0',
  '3.0.1',
  '3.2.0',
  '3.2.1',
  '3.2.2',
  '3.2.3',
  '3.2.4',
  '3.2.50',
  '3.2.6',
  '3.3.0',
  '3.3.1',
  '3.3.2',
  '3.3.3',
  '3.3.4',
  '3.4.0',
  '3.4.1',
  '3.4.2',
  '3.4.3',
  '3.5.0',
  '3.5.2',
  '3.5.3',
  '3.5.4',
  '3.6',
  '3.6.1',
  '3.6.2',
  '3.6.3',
  '3.6.0',
  '3.7',
  '3.7.1',
  '3.7.2',
  '3.7.3',
  '3.7.0',
  '3.8.0',
  '3.8.1',
  '3.8.2',
  '3.8.3',
  '3.8.4',
  '3.9.0',
  '3.9.1',
  '3.9.2',
  '3.9.3',
  '4.0',
  '4.0.0',
  '4.0.1',
  '4.0.2',
  '4.0.3',
  '4.0.4',
  '4.0.11',
  '4.1',
  '4.1.0',
  '4.1.1',
  '4.1.2',
  '4.2.0',
  '4.2.1',
  '4.2.2',
  '4.2.3',
  '4.2.4',
  '4.3.0',
  '4.3.1',
  '4.3.2',
  '4.3.3',
  '4.3.4',
  '5.1.0',
  '5.1.1',
  '5.1.2',
  '5.1.1.K9SEC',
  '5.1.3',
  '5.2.0',
  '5.2.1',
  '5.2.2',
  '5.2.4',
  '5.2.3',
  '5.2.5',
  '5.3.0',
  '5.3.1',
  '5.3.2',
  '5.0',
  '5.0.0',
  '5.0.1' );

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 );