libjpeg-turbo: Heap-based buffer overflow when decompressing corrupt JPEG images

[Huzaifa Sidhpurwala <huzaifas () redhat com>]

Hi all,

We were made aware of a flaw in libjpeg-turbo by Chris Evans of Google
security team. Details as follows:

A Heap-based buffer overflow was found in the way libjpeg-turbo
decompressed certain corrupt JPEG images in which the component count
was erroneously set to a large value. An attacker could create a
specially-crafted JPEG image that, when opened, could cause an
application using libpng to crash or, possibly, execute arbitrary code
with the privileges of the user running the application.

References:
https://bugzilla.redhat.com/show_bug.cgi?id=826849
http://libjpeg-turbo.svn.sourceforge.net/viewvc/libjpeg-turbo?view=revision&revision=830

This issue has been assigned CVE-2012-2806.

Upstream release of libjpeg-turbo-1.2.1 resolves this issue.


-- 
Huzaifa Sidhpurwala / Red Hat Security Response Team