Path traversal in FortiOS SSL VPN web portal



Published: 2019-05-27
Risk Medium
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
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FortiOS
Operating systems & Components / Operating system

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Path traversal

EUVDB-ID: #VU18609

Risk: Medium

CVSSv3.1:

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: 6.0.0 - 6.0.4, 5.6.3 - 5.6.7


CPE2.3 External links

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

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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