Cisco NX-OS Internet Group Management Protocol Denial of Service Vulnerability (Cisco-SA-20150817-CVE-2015-4324)

# Copyright (C) 2016 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/o:cisco:nx-os";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105699");
  script_version("2022-12-26T10:12:01+0000");
  script_tag(name:"last_modification", value:"2022-12-26 10:12:01 +0000 (Mon, 26 Dec 2022)");
  script_tag(name:"creation_date", value:"2016-05-12 16:08:14 +0200 (Thu, 12 May 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_cve_id("CVE-2015-4324");

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

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

  script_name("Cisco NX-OS Internet Group Management Protocol Denial of Service Vulnerability (Cisco-SA-20150817-CVE-2015-4324)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone Networks GmbH");
  script_family("CISCO");
  script_dependencies("gb_cisco_nx_os_consolidation.nasl");
  script_mandatory_keys("cisco/nx_os/detected", "cisco/nx_os/device", "cisco/nx_os/model");

  script_tag(name:"summary", value:"A vulnerability in the Internet Group Management Protocol
  version 3 (IGMPv3) input packet processing of Cisco NX-OS could allow an unauthenticated,
  adjacent attacker to cause the IGMP process to restart due to a malformed IGMP packet, which
  could cause a denial of service (DoS) condition on the 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 input validation when
  ensuring the memory allocated is large enough for the number of included sources in the IGMPv3
  packet. An attacker could exploit this vulnerability by sending a crafted IGMPv3 packet to the
  targeted device.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to cause the IGMP process to
  restart due to a buffer overflow, which may cause a DoS condition.");

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

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/Cisco-SA-20150817-CVE-2015-4324");

  exit(0);
}

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

if( ! device = get_kb_item( "cisco/nx_os/device" ) )
  exit( 0 );

if( "Nexus" >!< device )
  exit( 0 );

if ( ! nx_model = get_kb_item( "cisco/nx_os/model" ) )
  exit( 0 );

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

if( "1000V" >< nx_model ) {
  affected = make_list( "7.3(0)ZN(0.81)" );
}

if( nx_model =~ "^C?3[0-9]+" ) {
  affected = make_list( "7.3(0)ZN(0.81)" );
}

if( nx_model =~ "^C?4[0-9]+" ) {
  affected = make_list( "4.1(2)E1(1c)" );
}

if( nx_model =~ "^C?7[0-9]+" ) {
  affected = make_list( "7.2(0)N1(0.1)" );
}

if( nx_model =~ "^C?9[0-9]{3}" ) {
  affected = make_list( "7.3(0)ZN(0.81)" );
}

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 );