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Date: Thu, 24 Jun 2010 15:38:27 +0200
From: Tomas Hoger <>
Subject: Re: CVE requests: LibTIFF

On Thu, 24 Jun 2010 09:16:20 -0400 Dan Rosenberg wrote:

> >> 1.  Out-of-bounds read in TIFFExtractData() may result in
> >> application crash (no reference, fixed upstream).  Reported by Dan
> >> Rosenberg.
> >
> > Do you have any info on this?  I don't see anything obviously
> > related in changelog.  TIFFExtractData itself and all its uses seem
> > unchanged for years.
> Revision of libtiff/tif_dirread.c added code for ensuring
> valid tag type information for each TIFF directory entry.  Prior to
> this fix, unknown tag types would result in an out-of-bounds array
> index in TIFFExtractData() on any code path using this macro.  Ubuntu
> security backported this fix as debian/patches/fix-unknown-tags.patch
> in their libtiff4 package.

So the reference is:

Tomas Hoger / Red Hat Security Response Team

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