PSIRTInsufficient Session Expiration in SSLVPN using SAML authentication
Summary
An Insufficient Session Expiration vulnerability [CWE-613] in FortiOS SSL VPN may allow a remote attacker (e.g. a former admin whose account was removed and whose session was terminated) in possession of the SAML record of a user session to access or re-open that session via re-use of SAML record.
| Version | Affected | Solution |
|---|---|---|
| FortiOS 7.6 | 7.6.0 through 7.6.2 | Upgrade to 7.6.3 or above |
| FortiOS 7.4 | 7.4.0 through 7.4.6 | Upgrade to 7.4.7 or above |
| FortiOS 7.2 | 7.2.0 through 7.2.10 | Upgrade to 7.2.11 or above |
| FortiOS 7.0 | 7.0.0 through 7.0.16 | Upgrade to 7.0.17 or above |
| FortiOS 6.4 | 6.4 all versions | Migrate to a fixed release |
Workaround:
Use FortiClient built-in browser during SAML authentication without enabling "Use external browser as user-agent for saml user authentication".