Cisco Meeting Server H.264 Protocol Denial of Service Vulnerability

# 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:/a:cisco:meeting_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140274");
  script_cve_id("CVE-2017-6763");
  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_version("2023-07-25T05:05:58+0000");

  script_name("Cisco Meeting Server H.264 Protocol Denial of Service Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ms");

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

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

  script_tag(name:"summary", value:"A vulnerability in the implementation of the H.264 protocol in Cisco Meeting
Server (CMS) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an
affected system.");

  script_tag(name:"insight", value:"The vulnerability exists because the affected application does not properly
validate Fragmentation Unit (FU-A) protocol packets. An attacker could exploit this vulnerability by sending a
crafted H.264 FU-A packet through the affected application.");

  script_tag(name:"impact", value:"A successful exploit could allow the attacker to cause a DoS condition on the
affected system due to an unexpected restart of the CMS media process on the system. Although the CMS platform
continues to operate and only the single, affected CMS media process is restarted, a brief interruption of media
traffic for certain users could occur.");

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

  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  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:"2019-10-09 23:29:00 +0000 (Wed, 09 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-08-03 10:44:03 +0700 (Thu, 03 Aug 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_cisco_meeting_server_snmp_detect.nasl");
  script_mandatory_keys("cisco/meeting_server/installed");

  exit(0);
}

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

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

if (version_in_range(version: version, test_version: "2.1.0", test_version2: "2.1.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.1.6");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);