TippingPoint Zero Day Initiative

Oracle Java NumberFormatter and RealTimeSequencer Sandbox Bypass Remote Code Execution Vulnerability

ZDI-13-245: October 16th, 2013


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 usage of NumberFormatter and RealTimeSequencer. With the usage of these classes, it is possible to disable the security manager and run code as privileged. This allows a malicious applet to execute attacker-supplied code resulting in 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

    2013-05-14 - Vulnerability reported to vendor
    2013-10-16 - Coordinated public release of advisory


This vulnerability was discovered by:
    Ben Murphy