Apple today released an update to its WiFi drivers and software for some Intel-based Macs: the AirPort Extreme Update 2007-001 is recommended for all Intel-based Macs and provides compatibility with AirPort Extreme base stations and networks. Designed for users of both the server and client versions of Mac OS X 10.4.8 Tiger, it patches a vulnerability that enables attackers on the wireless network to cause system crashes. Specifically, an out-of-bounds memory read may occur while handling wireless frames, Apple said. "An attacker in local proximity may be able to trigger a system crash by sending a maliciously-crafted frame to an affected system. The company said that the issue affects the Core Duo version of Mac mini, MacBook, and MacBook Pro equipped with wireless connectivity, but that other systems, including the Core 2 Duo versions are not affected. According to the release notes, the update addresses the issue by performing additional validation of wireless frames.