Technical Description

A vulnerability has been identified in Microsoft Windows, which could be exploited by remote attackers to take complete control of an affected system. This issue is due to a stack overflow error within the "LoadAniIcon()" [user32.dll] function when rendering cursors, animated cursors or icons with a malformed header, which could be exploited by remote attackers to execute arbitrary commands by tricking a user into visiting a malicious web page or viewing an email message containing a specially crafted ANI file [...]

A fully functional remote code execution exploit is available for FrSIRT VNS subscribers.

References

http://www.frsirt.com/english/advisories/2007/1151
http://www.microsoft.com/technet/security/advisory/935423.mspx
http://www.microsoft.com/technet/security/bulletin/MS07-017.mspx

Credits

Vulnerability reported by Alexander Sotirov (Determina Security Research)

ChangeLog

2007-03-29 : Initial release
2007-03-29 : Updated References
2007-04-03 : Updated Solution

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