Cisco IOS Software IPv6 Denial of Service Vulnerability (cisco-sa-20170320-aniipv6)

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.106673");
  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:"2017-03-21 09:54:47 +0700 (Tue, 21 Mar 2017)");
  script_tag(name:"cvss_base", value:"7.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/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:"2019-10-09 23:27:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2017-3850");

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

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

  script_name("Cisco IOS Software IPv6 Denial of Service Vulnerability (cisco-sa-20170320-aniipv6)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 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 Autonomic Networking Infrastructure
  (ANI) feature of Cisco IOS Software could allow an unauthenticated, remote attacker to cause a
  denial of service (DoS) condition.");

  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 incomplete input validation on
  certain crafted packets. An attacker could exploit this vulnerability by sending a crafted IPv6
  packet to a device that is running a Cisco IOS Software release that supports the ANI feature.

  A device must meet two conditions to be affected by this vulnerability:

  - The device must be running a version of Cisco IOS Software that supports ANI (regardless of
  whether ANI is configured)

  - The device must have a reachable IPv6 interface");

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

  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-20170320-aniipv6");

  exit(0);
}

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

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

affected = make_list(
  "15.2(3)E",
  "15.2(3)E1",
  "15.2(3)E2",
  "15.2(3)E3",
  "15.2(4)E",
  "15.2(4)E1",
  "15.2(4)E2",
  "15.2(5)E",
  "15.2(5b)E",
  "15.3(3)S",
  "15.3(3)S1",
  "15.3(3)S2",
  "15.3(3)S3",
  "15.3(3)S4",
  "15.3(3)S5",
  "15.3(3)S6",
  "15.4(1)S",
  "15.4(1)S1",
  "15.4(1)S2",
  "15.4(1)S3",
  "15.4(1)S4",
  "15.4(2)S1",
  "15.4(2)S2",
  "15.4(2)S3",
  "15.4(2)S4",
  "15.4(3)S",
  "15.4(3)S1",
  "15.4(3)S2",
  "15.4(3)S3",
  "15.4(3)S4",
  "15.4(3)S5",
  "15.4(3)S6",
  "15.5(1)S",
  "15.5(1)S1",
  "15.5(1)S2",
  "15.5(1)S3",
  "15.5(1)S4",
  "15.5(2)S",
  "15.5(2)S1",
  "15.5(2)S2",
  "15.5(2)S3",
  "15.5(3)S",
  "15.5(3)S0a",
  "15.5(3)S1",
  "15.5(3)S1a",
  "15.5(3)S2",
  "15.5(3)S3",
  "15.5(3)SN",
  "15.6(1)S",
  "15.6(1)S1",
  "15.6(1)S2",
  "15.6(1)T",
  "15.6(1)T0a",
  "15.6(1)T1",
  "15.6(1)T2",
  "15.6(2)S",
  "15.6(2)S1",
  "15.6(2)SN",
  "15.6(2)T",
  "15.6(2)T1",
  "15.6(2)T2",
  "15.6(3)M" );

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 );