Vulnerabilities > CVE-2017-14187 - Improper Privilege Management vulnerability in Fortinet Fortios

047910
CVSS 6.2 - MEDIUM
Attack vector
PHYSICAL
Attack complexity
LOW
Privileges required
HIGH
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
low complexity
fortinet
CWE-269
nessus
NVD
Published: 2018-05-24
Updated: 2019-10-03

Summary

A local privilege escalation and local code execution vulnerability in Fortinet FortiOS 5.6.0 to 5.6.2, 5.4.0 to 5.4.8, and 5.2 and below versions allows attacker to execute unauthorized binary program contained on an USB drive plugged into a FortiGate via linking the aforementioned binary program to a command that is allowed to be run by the fnsysctl CLI command.

Vulnerable Configurations

Part Description Count
OS
Fortinet
129

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.

Nessus

NASL familyFirewalls
NASL idFORTIOS_FG-IR-17-245.NASL
descriptionThe remote host is running FortiOS 5.2.x or prior, 5.4.x prior to 5.4.9, or 5.6.x prior to 5.6.3. It is, therefore, affected by multiple vulnerabilities.
last seen2020-06-01
modified2020-06-02
plugin id110415
published2018-06-08
reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/110415
titleFortinet FortiGate <= 5.2.x / 5.4.x < 5.4.9 / 5.6.x < 5.6.3 Multiple Vulnerabilities (FG-IR-17-231, FG-IR-17-245 and FG-IR-17-172)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(110415);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id("CVE-2017-7738", "CVE-2017-14185", "CVE-2017-14187");
  script_bugtraq_id(102151, 104288, 104312);

  script_name(english:"Fortinet FortiGate <= 5.2.x / 5.4.x < 5.4.9 / 5.6.x < 5.6.3 Multiple Vulnerabilities (FG-IR-17-231, FG-IR-17-245 and FG-IR-17-172)");
  script_summary(english:"Checks the version of FortiOS.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running FortiOS 5.2.x or prior, 5.4.x prior to
5.4.9, or 5.6.x prior to 5.6.3. It is, therefore, affected by 
multiple vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-17-172");
  script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-17-231");
  script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-17-245");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Fortinet FortiOS version 5.4.9 / 5.6.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:P/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-14187");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("fortinet_version.nbin");
  script_require_keys("Host/Fortigate/model", "Host/Fortigate/version");

  exit(0);
}

include("audit.inc");
include("vcf.inc");

app_name = "FortiOS";

app_info = vcf::get_app_info(app:app_name, kb_ver:"Host/Fortigate/version");

constraints = [
  { "max_version" : "5.2.999", "fixed_version" : "5.4.9" },
  { "min_version" : "5.4.0", "max_version" : "5.4.8",  "fixed_version" : "5.4.9" },
  { "min_version" : "5.6.0", "max_version" : "5.6.2",  "fixed_version" : "5.6.3" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);

References