TippingPoint Zero Day Initiative

RealNetworks RealPlayer AAC TIT2 Atom Integer Overflow Remote Code Execution Vulnerability

ZDI-10-269: 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 8279. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of the 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 in RealPlayer's pnen3260.dll module while parsing the TIT2 atom within AAC files. The code within this module does not account for a negative size during an allocation and later uses the value as unsigned within a copy loop. Exploitation of this vulnerability allows an attacker to execute arbitrary code under the context of the user opening the AAC file.

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: