#VU18609 Path traversal

Published: 2020-03-18 | Updated: 2021-06-17

Vulnerability identifier: #VU18609

Vulnerability risk: Medium

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2018-13379


Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Operating systems & Components / Operating system

Vendor: Fortinet, Inc


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.


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

Vulnerable software versions

FortiOS: 5.6.3 - 6.0.4


External links

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.

Latest bulletins with this vulnerability