TippingPoint Zero Day Initiative

RealNetworks RealPlayer Cross-Zone Scripting Remote Code Execution Vulnerability

ZDI-10-275: December 10th, 2010


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10589. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. User interaction is requires in that a target must navigate to a malicious page.

The specific flaw exists within the HandleAction method of the RealPlayer ActiveX control with CLSID FDC7A535-4070-4B92-A0EA-D9994BCC0DC5. The vulnerable action that can be invoked via this control is NavigateToURL. If NavigateToURL can be pointed to a controlled file on the user's system, RealPlayer can be made to execute scripts in the Local Zone. To accomplish this, a malicious attacker can force a download of a skin file to a predictable location and then point NavigateToURL at it thus achieving remote code execution under the context of the user running RealPlayer.

Vendor Response

RealNetworks has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2010-05-12 - Vulnerability reported to vendor
    2010-12-10 - Coordinated public release of advisory


This vulnerability was discovered by: