CVE-2020-15938 Security feature bypass in Fortinet FortiOS

What is CVE-2020-15938?

CVE-2020-15938 is a medium-severity vulnerability in Fortinet Fortios, published on 4 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When traffic other than HTTP/S (eg: SSH traffic, etc...) traverses the FortiGate in version below 6.2.5 and below 6.4.2 on port 80/443, it is not redirected to the transparent proxy policy for processing, as it doesn't have a valid HTTP header.

Which versions are affected by CVE-2020-15938?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2020-15938?

No fix has been published for CVE-2020-15938 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-15938 being exploited?

There is no known exploitation of CVE-2020-15938 in the wild and no public exploit code.

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-7rj5-2x5r-5j6v.