Cisco IOS Frame Forwarding Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2016 Greenbone AG
# 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-only

CPE = "cpe:/o:cisco:ios";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106446");
  script_cve_id("CVE-2016-6473");
  script_tag(name:"cvss_base", value:"6.1");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:N/C:N/I:N/A:C");
  script_version("2023-07-20T05:05:17+0000");

  script_name("Cisco IOS Frame Forwarding Denial of Service Vulnerability");

  script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-ios");

  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 Cisco IOS on Catalysts Switches and Nexus 9300 Series
Switches could allow an unauthenticated, adjacent attacker to cause a Layer 2 network storm.");

  script_tag(name:"insight", value:"The vulnerability occurs because the software forwards Layer 2 frames that
should be consumed by the first hop. An attacker could exploit this vulnerability by injecting the Layer 2 frame
into the network segment.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause a Layer 2 network storm and
impact the availability of the switches.");

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

  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:A/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:"2017-01-06 19:59:00 +0000 (Fri, 06 Jan 2017)");
  script_tag(name:"creation_date", value:"2016-12-08 14:16:20 +0700 (Thu, 08 Dec 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_ssh_cisco_ios_get_version.nasl");
  script_mandatory_keys("cisco_ios/version");
  exit(0);
}

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

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

affected = make_list(
  '15.0(2)SE8',
  '15.2(3)E',
  '15.2(2)E1',
  '15.2(3)E1',
  '15.2(2)E2',
  '15.2(2a)E1',
  '15.2(3a)E' );

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 );