Tielei Wang has discovered a vulnerability in Yahoo Messenger, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an integer overflow error in the "CYImage::LoadJPG()" method (YImage.dll) when allocating memory using the image dimension values. This can be exploited to cause a heap-based buffer overflow via a specially crafted JPG file.
Successful exploitation may allow execution of arbitrary code, but requires a victim to allow photo sharing with an attacker.
The vulnerability is confirmed in version 18.104.22.168. Other versions may also be affected.
Solution: Update to version 22.214.171.124.
Provided and/or discovered by: Tielei Wang, Georgia Tech Information Security Center via Secunia.
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