Two vulnerabilities have been reported in Microsoft DirectX, which can be exploited by malicious people to compromise a user's system.

1) A boundary error in quartz.dll when parsing SAMI (Synchronized Accessible Media Interchange) files can be exploited to cause a stack-based buffer overflow when opening a specially crafted file.

Successful exploitation allows execution of arbitrary code.

The vulnerability has been reported in DirectX 7.0 and 8.1. Later versions are not affected.

2) An error within the DirectShow technology when parsing AVI and WAV files can be exploited to execute arbitrary code on a user's system when e.g. visiting a malicious website.

The vulnerability has been reported in DirectX 7.0 through 10.0.

Solution
Apply patches.
Further details available to Secunia VIM customers

Provided and/or discovered by
1) Jun Mao, VeriSign iDefense Labs.
2) The vendor credits Peter Winter-Smith, NGSSoftware.

Changelog
Further details available to Secunia VIM customers

Original Advisory
MS07-064 (KB941568):
http://www.microsoft.com/technet/security/Bulletin/MS07-064.mspx

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=632

Other references
Further details available to Secunia VIM customers

Alternate/detailed remediation
Further details available in Customer Area

Deep Links
Links available to Secunia VIM customers