TippingPoint Zero Day Initiative

RealNetworks RealPlayer Multi-Rate Audio Remote Code Execution Vulnerability

ZDI-10-266: 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 8441. 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 file containing a malformed multi-rate audio stream. The application explicitly trusts two 16-bit values in this data structure which are then used to calculate the size used for an allocation. When data is written to this allocated buffer, an overflow will occur which can lead 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
    2010-12-10 - Coordinated public release of advisory


This vulnerability was discovered by: