The Oracle-Proxy aka SQL-Gateway of Gauntlet Firewall version 6 crashes when invalid data is sent over any defined SQL-gw disallowing any future connections.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31698/gauntlet.txt
Source: https://packetstormsecurity.com/files/31698/gauntlet.txt.html