Yahoo Instant Messenger versions 5.6.0.1347 and below is susceptible to a buffer overflow attack in the YAUTO.DLL file when a long URL is passed to the Open(String Url) function.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/32320/yauto.txt
Source: https://packetstormsecurity.com/files/32320/yauto.txt.html