Fortinet FortiGate Cookie Parser Buffer Overflow Vulnerability (FG-IR-16-023) - Version Check

# 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:fortinet:fortios";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105875");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2016-08-18 11:05:04 +0200 (Thu, 18 Aug 2016)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-05-22 15:06:00 +0000 (Wed, 22 May 2019)");

  script_cve_id("CVE-2016-6909");

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

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

  script_name("Fortinet FortiGate Cookie Parser Buffer Overflow Vulnerability (FG-IR-16-023) - Version Check");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("FortiOS Local Security Checks");
  script_dependencies("gb_fortinet_fortigate_consolidation.nasl");
  script_mandatory_keys("fortinet/fortigate/detected");

  script_tag(name:"summary", value:"Fortinet FortiGate firmware (FOS) released before Aug 2012 has
  a cookie parser buffer overflow vulnerability.");

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

  script_tag(name:"impact", value:"This vulnerability, when exploited by a crafted HTTP request,
  can result in execution control being taken over.");

  script_tag(name:"affected", value:"FortiGate version 4.1.10 and prior, 4.2.x through 4.2.12 and
  4.3.x through 4.3.8.");

  script_tag(name:"solution", value:"Update to version 5.0.0, or update to release 4.3.9 or later
  for models not compatible with FortiOS 5.x.");

  script_xref(name:"URL", value:"https://www.fortiguard.com/psirt/FG-IR-16-023");
  script_xref(name:"Advisory-ID", value:"FG-IR-16-023");

  exit(0);
}

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

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

if (version_is_less_equal(version: version, test_version: "4.1.10") ||
    version_in_range(version: version, test_version: "4.2", test_version2: "4.2.12") ||
    version_in_range(version: version, test_version: "4.3", test_version2: "4.3.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.3.9 / 5.0.0");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);