TippingPoint Zero Day Initiative

Oracle Java IIOP Deserialization Type Confusion Remote Code Execution Vulnerability

ZDI-11-306: October 26th, 2011


CVSS Score

Affected Vendors

Affected Products

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Oracle Java. 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 way Java handles IIOP deserialization. Due to insufficient type checking it is possible to trick java into allowing access to otherwise protected and private fields in built-in objects. This could be used, for example, to disable to security manager normally in place for applets. This leads to remote code execution under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2011-05-12 - Vulnerability reported to vendor
    2011-10-26 - Coordinated public release of advisory


This vulnerability was discovered by:
    Sami Koivu