TippingPoint Zero Day Initiative

Red Hat OpenJDK IcedTea6 ClassLoader Remote Code Execution Vulnerability

ZDI-11-014: January 18th, 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 10778. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Java OpenJDK. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The flaw exists within the IcedTea.so component. When handling the an applet the process fails to properly restrict permission of code. It is possible to create and instantiate subclasses of ClassLoader. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the browser.

Vendor Response

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

Disclosure Timeline

    2010-12-21 - Vulnerability reported to vendor
    2011-01-18 - Coordinated public release of advisory


This vulnerability was discovered by: