Re: CVE-2014-9330: Libtiff integer overflow in bmp2tiff

[Paris Zoumpouloglou <pariszoump () gmail com>]

It's true utilities are pretty buggy. I've stumbled upon many duplicate
bugs in the tracker, probably because of all the afl action :)

What is also worth noting (I didn't notice at first) is that the latest
available stable source code of libtiff (found here
http://download.osgeo.org/libtiff/)  hasn't been updated since 2012.

Since then many bugs have been reported which have been fixed in the CVS
repo and distribution packages but no one has changed the the archives.

On 12/22/2014 09:48 PM, Michal Zalewski wrote:
> > Fuzzing bmp2tiff, using the afl-fuzzer, revealed an integer overflow issue
> > related to the dimensions of the input BMP image.
> It's probably worth noting that although the bundled utilities are
> pretty buggy, there are also several bugs affecting the libtiff
> library itself that can be hit with afl if you clean up the
> utility-level bugs first; these affect ImageMagick and any tools that
> rely on libtiff to display untrusted images.
>
> I reported some privately to the maintainers few weeks ago (before
> your report, in fact), but haven't had a lot of success so far.
> There's at least one other person who did the same.
>
> /mz
>
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