Tielei Wang has discovered a vulnerability in GNU Gnash, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an integer overflow error within the "GnashImage::size()" method (libbase/GnashImage.h) and can be exploited to cause a heap-based buffer overflow by tricking a user into opening a specially crafted SWF file.
The vulnerability is confirmed in version 0.8.10. Prior versions may also be affected.
Solution: Fixed in the GIT repository.
Provided and/or discovered by: Tielei Wang, Georgia Tech Information Security Center via Secunia.
Original Advisory: http://git.savannah.gnu.org/cgit/gnash.git/commit/?id=bb4dc77eecb6ed1b967e3ecbce3dac6c5e6f1527
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Subject: GNU Gnash "GnashImage::size()" Integer Overflow Vulnerability
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