iDefense Security Advisory 02.08.11 - Remote exploitation of a memory corruption vulnerability in Adobe Systems Inc.'s Reader could allow an attacker to execute arbitrary code with the privileges of the current user. JPEG2000 (JP2K) is an image file format similar to JPEG. In addition to JPEG markers, JP2K files also provide "boxes" that define different image properties. JP2K is one of the image formats supported by Adobe Reader and Acrobat. The vulnerability occurs when parsing a JPEG2000 file embedded inside of a PDF file. Several different JP2K record types are involved in the vulnerability. It is possible to increment a buffer index beyond the allocated data, and store pointers to file data at that location. This can result in the corruption of heap structures and application data, which leads to the execution of arbitrary code. iDefense has confirmed the existence of this vulnerability in Adobe Reader and Acrobat versions 9.4 and 8.2.5. A full list of vulnerable Adobe products can be found in Adobe Security Bulletin APSB11-03.
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