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CPU exhaustion in ReadOneJNGImage #526
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Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ https://github.com/ImageMagick/ImageMagick later today. The patch will be available in the beta releases of ImageMagick @ http://www.imagemagick.org/download/beta/ by sometime tomorrow. |
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i dont see this fixing it. did you want to add |
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Which loops? We added checks for EOF in several loops. Did we miss one? |
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thank you :) |
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@jgj212, could you please readd the testcase to your repo? |
Version: ImageMagick 7.0.6-1 Q16 x86_64
$magick identify $FILE
Here is the critical code
length can be controlled as follow:
length is 32bit, so the loop can be very large, and cause a lot of failed I/O
testcase:
https://github.com/jgj212/poc/blob/master/cpu-jng
Credit: ADLab of Venustech
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