This indicates an attempt to exploit a buffer overflow vulnerability in Nullsoft Winamp player.
The vulnerability is caused by an error that occurs when the vulnerable software handles crafted Ultravox protocol responses. It allows a remote attacker to execute arbitrary code via crafted Ultravox protocol responses.
AOL Winamp versions 2.666 through 5.3
System compromise: remote code execution.
Upgrade to AOL Winamp version 5.31 :