Cisco IOS Software Intrusion Prevention System Denial of Service Vulnerability (cisco-sa-20120926-ios-ips)

# 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("1.3.6.1.4.1.25623.1.0.105656");
  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:"2016-05-06 14:09:55 +0200 (Fri, 06 May 2016)");
  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_cve_id("CVE-2012-3950");

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

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

  script_name("Cisco IOS Software Intrusion Prevention System Denial of Service Vulnerability (cisco-sa-20120926-ios-ips)");

  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:"Cisco IOS Software contains a vulnerability in the Intrusion
  Prevention System (IPS) feature that could allow an unauthenticated, remote attacker to cause a
  reload of an affected device if specific Cisco IOS IPS configurations exist.");

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

  script_tag(name:"insight", value:"Cisco IOS Software contains a denial of service vulnerability
  that could allow an unauthenticated, remote attacker to cause an affected device to reload. An
  attacker could exploit this vulnerability by sending legitimate DNS packets through a device with
  an affected Cisco IOS IPS configuration.");

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

  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-20120926-ios-ips");

  exit(0);
}

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

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

affected = make_list(
  "12.4(22)GC1",
  "12.4(22)GC1a",
  "12.4(24)GC1",
  "12.4(24)GC3",
  "12.4(24)GC3a",
  "12.4(24)GC4",
  "12.4(16)MR1",
  "12.4(16)MR2",
  "12.4(19)MR",
  "12.4(11)T",
  "12.4(11)T1",
  "12.4(11)T2",
  "12.4(11)T3",
  "12.4(11)T4",
  "12.4(15)T",
  "12.4(15)T1",
  "12.4(15)T10",
  "12.4(15)T11",
  "12.4(15)T12",
  "12.4(15)T13",
  "12.4(15)T14",
  "12.4(15)T15",
  "12.4(15)T16",
  "12.4(15)T17",
  "12.4(15)T2",
  "12.4(15)T3",
  "12.4(15)T4",
  "12.4(15)T5",
  "12.4(15)T6",
  "12.4(15)T7",
  "12.4(15)T8",
  "12.4(15)T9",
  "12.4(20)T",
  "12.4(20)T1",
  "12.4(20)T2",
  "12.4(20)T3",
  "12.4(20)T4",
  "12.4(20)T5",
  "12.4(20)T6",
  "12.4(22)T",
  "12.4(22)T1",
  "12.4(22)T2",
  "12.4(22)T3",
  "12.4(22)T4",
  "12.4(22)T5",
  "12.4(24)T",
  "12.4(24)T1",
  "12.4(24)T2",
  "12.4(24)T3",
  "12.4(24)T4",
  "12.4(24)T5",
  "12.4(24)T6",
  "12.4(24)T7",
  "12.4(15)XF",
  "12.4(11)XJ",
  "12.4(11)XJ2",
  "12.4(11)XJ3",
  "12.4(11)XJ4",
  "12.4(14)XK",
  "12.4(11)XV",
  "12.4(11)XV1",
  "12.4(11)XW",
  "12.4(11)XW1",
  "12.4(11)XW10",
  "12.4(11)XW2",
  "12.4(11)XW3",
  "12.4(11)XW4",
  "12.4(11)XW5",
  "12.4(11)XW6",
  "12.4(11)XW7",
  "12.4(11)XW8",
  "12.4(11)XW9",
  "12.4(15)XY",
  "12.4(15)XY1",
  "12.4(15)XY2",
  "12.4(15)XY3",
  "12.4(15)XY4",
  "12.4(15)XY5",
  "12.4(15)XZ",
  "12.4(15)XZ1",
  "12.4(15)XZ2",
  "12.4(20)YA",
  "12.4(20)YA1",
  "12.4(20)YA2",
  "12.4(20)YA3",
  "12.4(22)YB",
  "12.4(22)YB1",
  "12.4(22)YB4",
  "12.4(22)YB5",
  "12.4(22)YB6",
  "12.4(22)YB7",
  "12.4(22)YB8",
  "15.0(1)M",
  "15.0(1)M1",
  "15.0(1)M2",
  "15.0(1)M3",
  "15.0(1)M4",
  "15.0(1)M5",
  "15.0(1)M6",
  "15.0(1)M6a",
  "15.0(1)M7",
  "15.0(1)M8",
  "15.0(1)XA",
  "15.0(1)XA1",
  "15.0(1)XA2",
  "15.0(1)XA3",
  "15.0(1)XA4",
  "15.0(1)XA5",
  "15.1(2)GC",
  "15.1(2)GC1",
  "15.1(2)GC2",
  "15.1(4)M",
  "15.1(4)M0a",
  "15.1(4)M0b",
  "15.1(4)M1",
  "15.1(4)M2",
  "15.1(4)M3",
  "15.1(4)M3a",
  "15.1(4)M4",
  "15.1(1)T",
  "15.1(1)T1",
  "15.1(1)T2",
  "15.1(1)T3",
  "15.1(1)T4",
  "15.1(1)T5",
  "15.1(2)T",
  "15.1(2)T0a",
  "15.1(2)T1",
  "15.1(2)T2",
  "15.1(2)T2a",
  "15.1(2)T3",
  "15.1(2)T4",
  "15.1(2)T5",
  "15.1(3)T",
  "15.1(3)T1",
  "15.1(3)T2",
  "15.1(3)T3",
  "15.1(3)T4",
  "15.1(1)XB",
  "15.1(1)XB1",
  "15.1(4)XB8a",
  "15.2(1)GC",
  "15.2(1)GC1",
  "15.2(1)GC2",
  "15.2(2)GC",
  "15.2(1)T",
  "15.2(1)T1",
  "15.2(1)T2",
  "15.2(2)T",
  "15.2(2)T1",
  "15.2(3)T",
  "15.2(3)T1",
  "15.2(3)XA" );

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 );