Unchecked boundary length causing multiple logic flaws

Summary

An allocation of resources without limits or throttling [CWE-770] vulnerability in FortiOS may allow a remote unauthenticated attacker to prevent access to the GUI via specially crafted requests directed at specific endpoints.

Version Affected Solution
FortiOS 7.6 7.6.0 Upgrade to 7.6.1 or above
FortiOS 7.4 7.4.0 through 7.4.4 Upgrade to 7.4.5 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 all versions Migrate to a fixed release
Follow the recommended upgrade path using our tool at: https://docs.fortinet.com/upgrade-tool

Acknowledgement

Fortinet is pleased to thank Ben Barnea from Akamai for reporting this vulnerability under responsible disclosure.

Timeline

2025-01-14: Initial publication
2025-01-22: Including 7.2.9 fix
2025-01-30: fixing 7.2 impacted versions