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CPU exhaustion in ReadOneDJVUImage #528

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jgj212 opened this issue Jun 24, 2017 · 1 comment

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commented Jun 24, 2017

Version: ImageMagick 7.0.6-1 Q16 x86_64

$magick identify $FILE

Here is the critical code

         do {															// line 591
                while ((message = ddjvu_message_peek(lc->context)))
                        {
                                tag=process_message(message);
                                if (tag == 0) break;
                                ddjvu_message_pop(lc->context);
                        }
                /* fixme: maybe exit? */
                /* if (lc->error) break; */

                message = pump_data_until_message(lc,image);
                if (message)
                        do {
                                tag=process_message(message);
                                if (tag == 0) break;
                                ddjvu_message_pop(lc->context);
                        } while ((message = ddjvu_message_peek(lc->context)));
        } while (!ddjvu_page_decoding_done(lc->page));

a crafted file will cause this loop endless.

testcase:
https://github.com/jgj212/poc/blob/master/cpu-djvu

Credit: ADLab of Venustech

@mikayla-grace

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commented Jun 24, 2017

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.

dlemstra pushed a commit that referenced this issue Jun 24, 2017

Cristy

dlemstra pushed a commit that referenced this issue Jun 24, 2017

@dlemstra dlemstra added the bug label Jul 2, 2017

@dlemstra dlemstra closed this Jul 2, 2017

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