Date: Thu, 6 Nov 2014 14:25:04 -0800 From: Michal Zalewski <lcamtuf@...edump.cx> To: oss-security <oss-security@...ts.openwall.com> 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 <roucaries.bastien@...il.com> wrote: > Hi, > > Passing special crafted jpeg file to imagemagick (convert -rotate 270 > 003632r270.jpg junk.jpg) could lead to stack smashing in libjpeg.so.62 > (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 768369@...s.debian.org. > > > Bastien
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