Java Pack200 Decoding Overflow Vulnerability

* Sun Microsystems Java Runtime he specific flaw exists within the code responsible for handling Pack200 compressed JAR files. During decompression, several fields within a Pack200 header are trusted and used to calculate sizes for heap buffer allocations. By providing malicious values an attacker can create undersized heap buffers and subsequently overflow them. This can be leveraged to execute arbitrary code under the context of the user accessing the file or web page. Patch Availability: Sun Microsystems has issued an update to correct this vulnerability. More details can be found at: http://sunsolve.sun.com/search/document.do?assetkey=1-66-263488-1 Disclosure Timeline: 2009-04-15 – Vulnerability reported to vendor 2009-08-05 – Coordinated public release of advisory