Package: dcraw
Severity: important
Tags: upstream

FYI, a buffer overflow looks like it could be worse than "important".

Ocert says:

#2015-006 dcraw input sanitization errors

Description:

The dcraw photo decoder is an open source project for raw image parsing.

The dcraw tool, as well as several other projects re-using its code, suffers
from an integer overflow condition which lead to a buffer overflow. The
vulnerability concerns the 'len' variable, parsed without validation from
opened images, used in the ljpeg_start() function.

A maliciously crafted raw image file can be used to trigger the vulnerability,
causing a Denial of Service condition.

Affected version:

   dcraw >= 7.00
   UFRaw >= 0.5
   LibRaw <= 0.16.0, 0.17-Alpha2
   RawTherapee >= 3.0
   CxImage >= 6.00
   Rawstudio >= 0.1
   Kodi >= 10.0
   ExactImage >= 0.1.0

Fixed version:

   dcraw, N/A
   UFRaw, N/A
   LibRaw >= 0.16.1, 0.17-Alpha3
   RawTherapee, N/A
   CxImage, N/A
   Rawstudio, N/A
   Kodi, N/A
   ExactImage, N/A

Credit: vulnerability report from Eduardo Castellanos <guayin [at] gmail [dot]
com>.  

CVE: N/A

Timeline:

2015-04-24: vulnerability report received
2015-04-27: contacted dcraw maintainer
2015-04-30: patch provided by maintainer
2015-05-04: reporter confirms patch
2015-05-11: contacted additional affected vendors
2015-05-11: advisory release

References:
https://github.com/LibRaw/LibRaw/commit/4606c28f494a750892c5c1ac7903e62dd1c6fdb5
https://github.com/rawstudio/rawstudio/commit/983bda1f0fa5fa86884381208274198a620f006e

Permalink:
http://www.ocert.org/advisories/ocert-2015-006.html



-- System Information:
Debian Release: 7.8
  APT prefers stable
  APT policy: (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash


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