Access of NULL pointer in SSLVPNd

Summary

An access of uninitialized pointer vulnerability [CWE-824] in the SSL-VPN portal of FortiOS & FortiProxy may allow a remote authenticated attacker to crash the sslvpn daemon via an HTTP GET request.

Affected Products

FortiProxy version 7.2.0 through 7.2.1
FortiProxy version 7.0.0 through 7.0.7
FortiProxy version 2.0.0 through 2.0.11
FortiProxy 1.2 all versions
FortiProxy 1.1 all versions
FortiOS version 7.2.0 through 7.2.3
FortiOS version 7.0.0 through 7.0.9
FortiOS version 6.4.0 through 6.4.11
FortiOS version 6.2.0 through 6.2.13

Solutions

Please upgrade to FortiOS version 7.2.4 or above
Please upgrade to FortiOS version 7.0.10 or above
Please upgrade to FortiOS version 6.4.12 or above
Please upgrade to FortiOS version 6.2.14 or above
Please upgrade to FortiProxy version 7.2.2 or above
Please upgrade to FortiProxy version 7.0.8 or above
Please upgrade to FortiProxy version 2.0.12 or above
FortiSASE is no longer impacted, issue remediated Q4/22

Acknowledgement

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

Timeline

2023-03-07: Initial publication