Weak authentication in security fabric daemon

Summary

A channel accessible by non-endpoint vulnerability [CWE-300] in FortiOS & FortiProxy may allow an unauthenticated attacker with the knowledge of device specific data to spoof the identity of a downstream device of the security fabric via crafted TCP requests.

Version Affected Solution
FortiOS 7.6 Not affected Not Applicable
FortiOS 7.4 7.4.0 through 7.4.3 Upgrade to 7.4.4 or above
FortiOS 7.2 7.2.0 through 7.2.8 Upgrade to 7.2.9 or above
FortiOS 7.0 7.0 all versions Migrate to a fixed release
FortiOS 6.4 6.4.2 through 6.4.16 Migrate to a fixed release
FortiProxy 7.6 Not affected Not Applicable
FortiProxy 7.4 7.4.0 through 7.4.3 Upgrade to 7.4.4 or above
FortiProxy 7.2 7.2.0 through 7.2.9 Upgrade to 7.2.10 or above
FortiProxy 7.0 7.0.0 through 7.0.16 Upgrade to 7.0.17 or above
Follow the recommended upgrade path using our tool at: https://docs.fortinet.com/upgrade-tool

Acknowledgement

Internally discovered and reported by Théo Leleu of Fortinet Product Security team.

Timeline

2025-06-10: Initial publication