description: Long lived sessions in Fortinet FortiGate devices with FortiOS 5.x before 5.4.0 could violate a security policy during IPS signature updates when the FortiGate's IPSengine is configured in flow mode. All FortiGate versions with IPS configured in proxy mode (the default mode) are not affected.
problem types: Protection bypass
affected:
{
product: FortiOS
vendor: Fortinet
versions:
status: affected, version: 5.0.x, 5.2.x
}