Re: CVE requests: LibTIFF

[Tomas Hoger <thoger () redhat com>]

On Wed, 23 Jun 2010 14:01:14 -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.

> 2.  Out-of-bounds read in TIFFVGetField() may result in application
> crash
> (https://bugs.launchpad.net/ubuntu/lucid/+source/tiff/+bug/589145).

This is NULL deref.  Another Sauli's test case shows that similar
problem can occur with NULL td_stripbytecount few lines below
td_stripoffset case addressed in upstream patch.

> The fix for this issue was combined with the fix for CVE-2010-2065,
> but it appears to be a separate issue.  Reported by Sauli Pahlman.

Right, not related to what CVE-2010-2065 was assigned to.

> 3.  Memory corruption in TIFFRGBAImageGet() due to buffer overflow
> (https://bugs.launchpad.net/ubuntu/+source/tiff/+bug/591605).
> Reported by Sauli Pahlman.

IIRC, Sauli's file only demonstrates OOB read.  Upstream bug:
http://bugzilla.maptools.org/show_bug.cgi?id=2216

> 4.  http://bugzilla.maptools.org/show_bug.cgi?id=2207 ("tif_getimage
> fails when flipping vertically on 64-bit platforms")

CVE-2010-2233 was assigned to this issue.

-- 
Tomas Hoger / Red Hat Security Response Team