Heap-based buffer overflow in the BlueSkychat (BlueSkyCat) ActiveX control (V2.V2Ctrl.1) in v2.ocx 8.1.2.0 and earlier allows remote attackers to execute arbitrary code via a long string in the second argument to the ConnecttoServer method.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35699
http://www.securityfocus.com/archive/1/475150/100/0/threaded
http://securityreason.com/securityalert/2959
http://lists.grok.org.uk/pipermail/full-disclosure/2007-July/064995.html