Description: This security update resolves two privately reported vulnerabilities in Windows Media Runtime. The vulnerabilities could allow remote code execution if a user opened a specially crafted media file or received specially crafted streaming content from a Web site or any application that delivers Web content. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the local user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. The security update addresses the vulnerabilities by changing the manner in which the Windows Media Runtime processes ASF files and initializes functions in compressed audio files.
Update type: Critical
Release date: October 13, 2009
Applies to: All versions
Knowledge base: http://support.microsoft.com/kb/975682
Download link: 32-bit | 64-bit
Comments:Here are the specifics on the vulnerabilities covered by this update: