Barely two weeks after releasing Security Update 2010-002, Apple has released a small security update that addresses a single critical vulnerability in Apple Type Service (ATS). According to Apple, Security Update 2010-003 patches ATS, addressing the following: "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." Because of the nature of this issue, installation of Security Update 2010-003 is highly recommended.
The update is available for Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X v10.6.3, Mac OS X Server v10.6.3