Information disclosure in Fortinet FortiProxy

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 update from vendor's website.

Vulnerable software versions

FortiProxy: 1.0.0 - 2.0.0

CPE2.3

• cpe:2.3:h:fortinet:fortiproxy:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.4:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.5:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.6:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.0.7:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:1.1.1:*:*:*:*:*:*:*

External links

https://www.fortiguard.com/psirt/FG-IR-20-233

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.