Cisco Web Security Appliance HTTP Load Denial of Service Vulnerability

# 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:/h:cisco:web_security_appliance";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106255");
  script_version("2025-09-05T15:40:40+0000");
  script_tag(name:"last_modification", value:"2025-09-05 15:40:40 +0000 (Fri, 05 Sep 2025)");
  script_tag(name:"creation_date", value:"2016-09-16 12:38:55 +0700 (Fri, 16 Sep 2016)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/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:"2017-07-30 01:29:00 +0000 (Sun, 30 Jul 2017)");

  script_cve_id("CVE-2016-6407");

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

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

  script_name("Cisco Web Security Appliance HTTP Load Denial of Service Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("CISCO");
  script_dependencies("gb_cisco_wsa_version.nasl");
  script_mandatory_keys("cisco_wsa/installed");

  script_tag(name:"summary", value:"A vulnerability in HTTP request forwarding with Cisco AsyncOS for
Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service
(DoS) condition due to link saturation.");

  script_tag(name:"insight", value:"The vulnerability is due to how HTTP data ranges are downloaded from the
destination server. An attacker could exploit this vulnerability by sending multiple crafted HTTP requests to the
targeted device.");

  script_tag(name:"impact", value:"An exploit could allow the attacker to trigger multiple simultaneous
downloads for the same HTTP data. This could cause a DoS condition due to heavy traffic on the connection to the
server.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure
  of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer
  release, disable respective features, remove the product or replace the product by another one.");

  script_xref(name:"URL", value:"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160914-wsa");

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

  exit(0);
}

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

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

affected = make_list(
  '5.6.0-623',
  '6.0.0-000',
  '7.1.0',
  '7.1.1',
   '7.1.2',
  '7.1.3',
  '7.1.4',
  '7.5.0-000',
  '7.5.0-825',
  '7.5.1-000',
  '7.5.2-000',
  '7.5.2-HP2-303',
  '7.7.0-000',
  '7.7.0-608',
  '7.7.1-000',
  '7.7.5-835',
  '8.0.0-000',
  '8.0.5',
  '8.0.5 Hot Patch 1',
  '8.0.6',
  '8.0.7',
  '8.0.6-078',
  '8.0.8-MR-113',
  '8.0.7-142',
  '8.0.6-119',
  '8.5.0.000',
  '8.5.0-497',
  '8.5.2-027',
  '8.5.2-024',
  '8.5.1-021',
  '8.5.3-055',
  '8.8.0-000',
  '8.8.0-085',
  '9.0 Base',
  '9.0.0-193',
  '9.1 Base',
  '9.1.0-000',
  '9.1.0-070',
  '9.5 Base',
  '9.5.0-235',
  '9.5.0-284',
  '9.5.0-444' );

foreach af ( affected )
{
  if( version == af )
  {
    report = report_fixed_ver(  installed_version:version, fixed_version: "None Available" );
    security_message( port:0, data:report );
    exit( 0 );
  }
}

exit(0);