TippingPoint Zero Day Initiative

RealNetworks RealPlayer FLV Parsing Multiple Integer Overflow Vulnerabilities

ZDI-10-167: August 26th, 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 10464. 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. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the module responsible for handling the FLV file format. While parsing the HX_FLV_META_AMF_TYPE_MIXEDARRAY and the HX_FLV_META_AMF_TYPE_ARRAY data types the ParseKnownType function makes two improper calculations that can force integers to wrap. A remote attacker can exploit these vulnerabilities to execute arbitrary code under the context of the user playing the file.

Vendor Response

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

Disclosure Timeline

    2009-12-04 - Vulnerability reported to vendor
    2010-08-26 - Coordinated public release of advisory


This vulnerability was discovered by:
    Sebastian Apelt, siberas