Description
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
References
- 7436 vdb-entry
- 20030422 UDP bypassing in Kerio Firewall 2.1.4 mailing-list
- kerio-pf-firewall-bypass(11880) vdb-entry
- http://www.securiteam.com/securitynews/5FP0N1P9PI.html