Late Wednesday, Apple released Security Update 2009 – 004 for Mac OS X 10.4 and Mac OS X 10.5. The new update, which can be located and installed via Mac OS X’s Software Update feature, repairs a vulnerability in software package BIND that could let a remote party interrupt the Domain Name System service. According to Macworld, BIND has previously been the target of hackers, most notably a major vulnerability exposed by security expert Dan Kaminsky in 2008 that was later patched by Apple and other software vendors. On the upside, while BIND is included in OS X (both server and client editions) it’s not enabled by default.

If you’ve tried the update and have any feedback to offer, let us know in the comments.