Pidgin 2.7.11 closes DoS bug
The Pidgin development team has issued version 2.7.11 of its open source instant messenger application. According to security specialist Secunia, the maintenance and security update corrects a NULL pointer dereference error when processing certain YMSG (Yahoo!/Yahoo! JAPAN messenger) packets that could be used by an attacker to cause a denial-of-service (DoS) condition.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump