FortiNAC - SSL Renegotation leading to DoS

Summary

An improper permissions, privileges, and access controls vulnerability [CWE-264] in FortiNAC may allow an unauthenticated attacker to perform a DoS attack on the device via client-secure renegotiation.

Affected Products

At least
FortiNAC version 9.4.0 through 9.4.1
FortiNAC version 9.2.0 through 9.2.6
FortiNAC version 9.1.0 through 9.1.8
FortiNAC 8.8 all versions
FortiNAC 8.7 all versions
FortiNAC 8.6 all versions are not affected
FortiNAC 8.5 all versions are not affected
FortiNAC version 7.2.0

Solutions

Please upgrade to FortiNAC-F version 7.2.1 or above
Please upgrade to FortiNAC version 9.4.2 or above
Please upgrade to FortiNAC version 9.2.7 or above
Please upgrade to FortiNAC version 9.1.9 or above

Acknowledgement

Fortinet is pleased to thank KPN for bringing this issue to our attention under responsible disclosure.

Timeline

2023-06-12: Initial publication