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Date: Thu, 6 Nov 2014 14:25:04 -0800
From: Michal Zalewski <>
To: oss-security <>
Subject: Re: Stack smashing in libjpeg-turbo

Is this a bug in libjpeg-turbo or in ImageMagick? I can't really repro
this with up-to-date versions:

[lcamtuf@...coon libjpeg-turbo-1.3.1]$ ./djpeg 003632r270.jpg
Corrupt JPEG data: 1056 extraneous bytes before marker 0xd8
Invalid JPEG file structure: two SOI markers
[lcamtuf@...coon libjpeg-turbo-1.3.1]$

[lcamtuf@...coon ImageMagick-6.8.9-9]$ utilities/convert -rotate 270
003632r270.jpg foo.jpg
[lcamtuf@...coon ImageMagick-6.8.9-9]$

On Thu, Nov 6, 2014 at 1:27 PM, Bastien ROUCARIES
<> wrote:
> Hi,
> Passing special crafted jpeg file to imagemagick (convert -rotate 270
> 003632r270.jpg junk.jpg) could lead to stack smashing in
> (libjpeg-turbo).
> This bug is triggered  by setting the optimize coding member of the
> JPEG initialization structure to TRUE. If this flag set it to FALSE,
> ImageMagick completes without complaint.
> Wokarround could consist to turn off compression optimization in
> imagemagick to prevent the stack smash.
> Please assing me CVE and make a cc to
> Bastien

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