Apple has released a fresh batch of security updates for both Mac OS 10.6 Snow Leopard and Mac OS 10.5 Leopard. Apple says:
An unchecked index issue exists in Apple Type Services’ handling of embedded fonts. Viewing or downloading a document containing a maliciously crafted embedded font may lead to arbitrary code execution. This issue is addressed through improved index checking. Credit to Charlie Miller working with TippingPoint’s Zero Day Initiative for reporting this issue.
To learn more about Apple Product Security, see the Apple Product Security website.
Get the updates at the links below, or via your Mac’s Software Update panel (found by clicking the Apple in the upper left corner of your Mac’s screen and choosing “Software Update…”).
The OS 10.5 Leopard updates on Apple’s site bundle updates, which is why they are so large file compared to the Snow Leopard updates.