CVE-2018-13379 Fortinet FortiOS SSL VPN Path Traversal

What is CVE-2018-13379?

CVE-2018-13379 is a critical path traversal vulnerability in Fortinet Fortios, published on 4 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An Improper Limitation of a Pathname to a Restricted Directory ("Path Traversal") in Fortinet FortiOS 6.0.0 to 6.0.4, 5.6.3 to 5.6.7 and 5.4.6 to 5.4.12 and FortiProxy 2.0.0, 1.2.0 to 1.2.8, 1.1.0 to 1.1.6, 1.0.0 to 1.0.7 under SSL VPN web portal allows an unauthenticated attacker to download system files via special crafted HTTP resource requests.

Weakness: CWE-22

Which versions are affected by CVE-2018-13379?

It affects 2 products.

Products include Fortinet Fortios, Fortinet Fortiproxy.

How do I fix CVE-2018-13379?

No fix has been published for CVE-2018-13379 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-13379 being exploited?

Yes. Attackers have exploited CVE-2018-13379 in the wild since at least 3 Nov 2021, including in ransomware campaigns.

Public exploit code: 1 Metasploit module, 2 Exploit-DB entries, 1 Nuclei template and 14 proofs of concept on GitHub.

Other vulnerabilities in Fortinet Fortios

• CVE-2024-23113 Fortinet Multiple Products Format String Exploited Critical 9.8
• CVE-2022-40684 Fortinet Multiple Products Authentication Bypass Exploited Critical 9.8
• CVE-2024-55591 Fortinet FortiOS and FortiProxy Authentication Bypass Exploited Critical 9.6
• CVE-2024-21762 Fortinet FortiOS Out-of-Bound Write Exploited Critical 9.6
• CVE-2022-42475 Fortinet FortiOS Heap-Based Buffer Overflow Exploited Critical 9.3

All Fortinet Fortios vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-2q79-m25p-r2q3.