TippingPoint Zero Day Initiative

Realplayer vidplin.dll AVI Parsing Remote Code Execution Vulnerability

ZDI-11-033: January 27th, 2011


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10640. 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 SP. 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 the vidplin.dll module. A buffer is allocated according to the user supplied length value. User supplied data is then copied into the allocated buffer, without verifying length, allowing the data to be written past the bounds of the previously allocated buffer. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the user running RealPlayer.

Vendor Response

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

Disclosure Timeline

    2010-09-14 - Vulnerability reported to vendor
    2011-01-27 - Coordinated public release of advisory


This vulnerability was discovered by:
    Juan Pablo Lopez Yacubian