Re: Double free corruption in JasPer JPEG-2000 implementation (CVE-2015-5203)

[mancha <mancha1 () zoho com>]

On Sun, Aug 16, 2015 at 06:48:49PM +0000, mancha wrote:
> On Sun, Aug 16, 2015 at 05:22:50PM +0200, Gustavo Grieco wrote:
> > A new double free affecting JasPer JPEG-2000 (libjasper 1.900) has
> > been found triggered by function jasper_image_stop_load.  Despite
> > this library is used by many programs (
> > http://www.ece.uvic.ca/~frodo/jasper/#overview), there is no one
> > providing support, so there is no fix so far.
>
> If you email me your crasher I can look into a fix.
>
> > This vulnerability was found by QuickFuzz.
> >
> > Regards, Gustavo.
>
> --mancha (https://twitter.com/mancha140)

By way of update, Gustavo shared his crasher with me and I've since
provided him with a patch that solves the most immediate cause of the
double free. However, in my review I've found other issues that require
some TLC.

I am waiting to hear back from Gustavo for his feedback.

--mancha

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