TippingPoint Zero Day Initiative

RealNetworks RealPlayer Skin Parsing Remote Code Execution Vulnerability

ZDI-10-010: January 21st, 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 8493. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute code on vulnerable installations of RealNetworks RealPlayer. User interaction is required in that a user must visit a malicious website or open a malicious file and accept a dialog to switch player skins.

The specific flaw exists during parsing of malformed RealPlayer .RJS skin files. While loading a skin the application copies certain variable length fields from the extracted file named web.xmb into a statically sized buffer. By crafting these fields appropriately an attack can cause the process to overflow the buffer. This can be leveraged to execute arbitrary code with the privileges of the application.

Vendor Response

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

Disclosure Timeline

    2009-01-15 - Vulnerability reported to vendor
    2010-01-21 - Coordinated public release of advisory


This vulnerability was discovered by:
    Peter Vreugdenhil (security@petervreugdenhil.nl)