Cisco IOS IKEv2 Denial of Service Vulnerability (cisco-sa-20161005-ios-ikev)

# 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("1.3.6.1.4.1.25623.1.0.106336");
  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:"2016-10-06 11:24:50 +0700 (Thu, 06 Oct 2016)");
  script_tag(name:"cvss_base", value:"6.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/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-2016-6423");

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

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

  script_name("Cisco IOS IKEv2 Denial of Service Vulnerability (cisco-sa-20161005-ios-ikev)");

  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 the Internet Key Exchange version 2 (IKEv2)
  code of Cisco IOS could allow an unauthenticated, remote attacker to cause a reload of the
  affected device.");

  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 crafted IKEv2
  packets. The vulnerability applies only to IKEv2 devices acting as clients or IKEv2 initiators.
  An attacker could exploit this vulnerability by sending crafted packets to the affected devices.
  An attacker, however, would need to be able to force the affected device to connect to a rogue
  IKEv2 server under its control.");

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

  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-20161005-ios-ikev");

  exit(0);
}

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

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

if( version == "15.5(3)M" ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"See advisory" );
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );