Cisco IOS Frame Forwarding Denial of Service Vulnerability (cisco-sa-20161207-ios)

# 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_version("2026-02-02T05:59:28+0000");
  script_tag(name:"last_modification", value:"2026-02-02 05:59:28 +0000 (Mon, 02 Feb 2026)");
  script_tag(name:"creation_date", value:"2016-12-08 14:16:20 +0700 (Thu, 08 Dec 2016)");
  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_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:"2016-12-15 17:10:36 +0000 (Thu, 15 Dec 2016)");

  script_cve_id("CVE-2016-6473");

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

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

  script_name("Cisco IOS Frame Forwarding Denial of Service Vulnerability (cisco-sa-20161207-ios)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("CISCO");
  script_dependencies("gb_cisco_ios_consolidation.nasl");
  script_mandatory_keys("cisco/ios/detected");

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

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

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

  exit(0);
}

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

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