The fifth security update from Apple this year for its Mac OS X includes both client and servers versions for 10.5 Leopard and 10.6 Snow Leopard.

Apple outlined the vulnerabilities it its latest security update advisory, among which is a fix for a stack buffer overflow caused by downloading a maliciously-created document file. This flaw could lead to code execution, according to Apple.

Also included were fixes that prevent man-in-the-middle attacks over anonymous TLS/SSL connections, leading to possible data loss of sensitive information. Vulnerabilities in the ClamAV anti-virus application were also addressed, which applies only to server systems.