TippingPoint Zero Day Initiative

Oracle Java Unsigned Applet Applet2ClassLoader Remote Code Execution Vulnerability

ZDI-11-084: February 15th, 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 10594. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the Java Runtime Environment. 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 findClass method of the sun.plugin2.applet.Applet2ClassLoader class. Due to a failure to properly validate URLs supplied by an implicitly trusted applet, it is possible to execute arbitrary code on Windows 32-bit and 64-bit, as well as Linux 32-bit platforms under the context of the SYSTEM user.

Vendor Response

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

Disclosure Timeline

    2010-09-28 - Vulnerability reported to vendor
    2011-02-15 - Coordinated public release of advisory


This vulnerability was discovered by:
    Frederic Hoguin