Rule:--Sid:12663--Summary:This event is generated when an attempt is made to exploit a known vulnerability in 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 RealPlayer is made. This may indicate an attempt to exploit known vulnerabilities in that ActiveX control which may lead to a system compromise.An ActiveX control in ierpplug.dll for RealNetworks RealPlayer 10.5 allows remote attackers to cause a denial of service (Internet Explorer 7 crash) by invoking the RealPlayer.OpenURLInPlayerBrowser method with a long second argument.--Affected Systems:Microsoft Windows systems using the RealPlayer ActiveX control--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:This document was generated from data supplied by the National Vulnerability Database. A product of the National Institute of Standards and Technology.For more information see http://nvd.nist.gov/Sourcefire Vulnerability Research TeamAlex Kirk <akirk@sourcefire.com>Nigel Houghton <nigel.houghton@sourcefire.com>--Additional References--