AOL Instant Messenger 5.5.x and earlier allows remote attackers to cause a denial of service (client crash) via an invalid smiley icon location in the sml parameter of a font tag.
Buffer overflow in the goaway function in the aim:goaway URI handler for AOL Instant Messenger (AIM) 5.5, including 5.5.3595, allows remote attackers to execute arbitrary code via a long Away message.