TippingPoint Zero Day Initiative

RealNetworks RealPlayer ActiveX Control CDDA URI Uninitialized Pointer Remote Code Execution Vulnerability

ZDI-10-210: October 15th, 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 9337. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealPlayer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists during the parsing of long CDDA URIs due to a failure to initialize a particular component of an object. The application will later call a method in the object leading to the uninitialized pointer being called. If an attacker can place data they control at the uninitialized location, the application will call malicious pointer which can lead to code execution under the context of the application.

Vendor Response

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

Disclosure Timeline

    2009-11-24 - Vulnerability reported to vendor
    2010-10-15 - Coordinated public release of advisory


This vulnerability was discovered by: