Arbitrary file download in FortiADC

1) Path traversal

EUVDB-ID: #VU69940

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33876

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

Exploit availability: No

Description

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

The vulnerability exists due to input validation error when processing directory traversal sequences in download feature. A remote user can send a specially crafted HTTP request and download arbitrary files  from the underlying Linux system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiADC: 5.1.0 - 7.1.0

External links

http://fortiguard.com/psirt/FG-IR-22-253

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.