source: http://www.securityfocus.com/bid/6222/info

A vulnerability has been discovered in the Java! JustInTime compiled used by Netscape Communicator, related to the generation of Intel instructions from specially constructed Java bytecode.

If a malicous applet is compiled by the vulnerable compiler, it may be possible to redirect program flow to point to attacker-controlled memory.

Successful execution of attacker-supplied instructions may result in arbitrary system commands being executed outside of the Java sandbox, with privileges of the JVM process.

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/22028.tar.gz