TippingPoint Zero Day Initiative

RealNetworks RealPlayer ImageMap Remote Code Execution Vulnerability

ZDI-10-280: 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 10290. 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 file.

The specific flaw exists within how the application decodes data for a particular mime type within a RealMedia file. When decoding the data used for rendering, the application will use the length of a string in an addition used to calculate the size of a buffer. The application will zero-extend it and then allocate. Due to the addition, the result of the calculation can be greater than 16-bits, and when the typecast occurs the result will be smaller than expected. When initializing this buffer, a buffer overflow will occur which can allow for 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

    2010-08-25 - Vulnerability reported to vendor
    2010-12-10 - Coordinated public release of advisory


This vulnerability was discovered by:
    Sebastian Apelt & Andreas Schmidt (www.siberas.de)