Rule:--Sid:9671--Summary:This event is generated when an attempt is made to exploit a known vulnerability in Microsoft Internet Explorer via an ActiveX control.--Impact:A successful attack can cause a buffer overflow and the subsequent execution of arbitrary code with system level privileges on a vulnerable host.--Detailed Information:A vulnerability exists in the way that Internet Explorer handles ActiveX controls that may present an attacker with the opportunity to run code of their choosing on a host.In particular, this event is generated when a call to the component RealPlayer AutoStream.AutoStream.1 ActiveX clsid access is made.--Affected Systems:Microsoft Internet Explorer--Attack Scenarios:An attacker can host a web site that will return code of their choosing to the object when a victim clicks on a malicious link.--Ease of Attack:Simple.--False Positives:None known.--False Negatives:None known.--Corrective Action:Upgrade to the most current non-affected version of the product.--Contributors:Sourcefire Vulnerability Research TeamAlex Kirk <akirk@sourcefire.com>Nigel Houghton <nigel.houghton@sourcefire.com>--Additional References--