TippingPoint Zero Day Initiative

RealNetworks RealPlayer Cook Audio Codec Parsing Remote Code Execution Vulnerability

ZDI-10-272: 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 8454. 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 required to exploit this vulnerability in that the target must visit a malicious page or open a malicious media file.

The specific flaw exists in the parsing of audio codec information encapsulated in a Real Audio media file. While processing cook audio codec data the number of subbands is improperly calculated. By specifying a large number of subbands an allocated heap chunk can be overflown. Successful exploitation can result in system compromise under the credentials of the currently logged in user.

Vendor Response

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

Disclosure Timeline

    2009-06-25 - Vulnerability reported to vendor
    2010-12-10 - Coordinated public release of advisory


This vulnerability was discovered by: