Apple has issued yet another update to its QuickTime media player to plug at least three security holes, including a Real Time Streaming Protocol streaming media vulnerability identified in late November that could allow an attacker to run malicious code on a victim’s machine.

QuickTime 7.3.1 also resolves two previously unreported “highly critical” QuickTime vulnerabilities that could lead to remote DoS attacks. One of those flaws relates to malicious QuickTime Media Link files, while the other involves QuickTime’s Flash media handler. The update is available to Mac users via the built-in Software Update feature, while Windows users can either download the patched version from the Apple’s website or use the Windows-only update tool.