Apple hase released Apple-SA-2010-08-24-1 to address a host of security issues in Mac OSX client and Mac OSX server. Highlight include addressing the stack buffer overflow in Apple Type Services (ATS), CFNetwork which allowed anonymous TLS/SSL connections, ClamAV update to 0.96.1 (Vulnerabilities in older versions), CoreGraphics heap buffer overflow and libsecurity not properly comparing host names with three componets.
Administrators and Users should apply this patch immediately to their systems. For more details visit the reference link below. This update requires a reboot.