Path traversal in FortiOS SSL VPN web portal



| Updated: 2024-11-29
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-13379
CWE-ID CWE-22
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
 FortiOS
Operating systems & Components / Operating system

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Path traversal

EUVDB-ID: #VU18609

Risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2018-13379

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote non-authenticated attacker can send a specially crafted HTTP request and download arbitrary file from FortiOS SSL VPN web portal.

Mitigation

Install updates from vendor's website.

As a temporary solution, disable the SSL-VPN web portal service by applying the following CLI commands:

config vpn ssl settings

unset source-interface

end

Vulnerable software versions

FortiOS: 5.6.3 - 6.0.4

CPE2.3 External links

https://fortiguard.com/psirt/FG-IR-18-384


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.



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