Apple has fixed nine vulnerabilities in its QuickTime media player software, all of which can be used to execute arbitrary code on vulnerable machines. The fixes repair a number of critical holes in QuickTime, Apple s software for playing videos and other content. Several of the flaws are buffer overflows, and users who still run QuickTime should update it as soon as possible. The patch for QuickTime is for Windows machines running XP SP2 or later, Vista or Windows 7. Many flaws fixed in the new version of the software can be triggered by exploits that are contained in malicious movie files or hosted on malicious Web sites.
Source: https://threatpost.com/apple-fixes-critical-flaws-quicktime-773-110812/77199/