CVE-2019-5591 Fortinet FortiOS Default Configuration

What is CVE-2019-5591?

CVE-2019-5591 is a medium-severity vulnerability in Fortinet Fortios, published on 14 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.

Weakness: CWE-306

Which versions are affected by CVE-2019-5591?

It affects 1 product.

Products include Fortinet Fortios.

How do I fix CVE-2019-5591?

No fix has been published for CVE-2019-5591 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

Is CVE-2019-5591 being exploited?

Yes. Attackers have exploited CVE-2019-5591 in the wild since at least 3 Nov 2021, including in ransomware campaigns.

Public exploit code: 1 Nuclei template and 1 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-p9g8-h33v-mg42.