TippingPoint Zero Day Initiative

RealNetworks RealPlayer Malformed IVR Object Index Code Execution Vulnerability

ZDI-10-166: August 26th, 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 8451. For further product information on the TippingPoint IPS:

Vulnerability Details

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

The specific flaw exists when parsing a RealMedia .IVR file containing a malformed data header. The application explicitly trusts an index in this data structure to seek into a list of objects. If one specifies an index outside the bounds of the array, the application will later dereference an object from the calculated pointer and then call it, leading to code execution under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2009-04-15 - Vulnerability reported to vendor
    2010-08-26 - Coordinated public release of advisory


This vulnerability was discovered by: