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AddressSanitizer: Invalid read at xwd.c:573 #1553

HongxuChen opened this issue Apr 20, 2019 · 2 comments


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commented Apr 20, 2019


  • I have written a descriptive issue title
  • I have verified that I am using the latest version of ImageMagick
  • I have searched open and closed issues to ensure it has not already been reported


When reading on XWD files ImageMagick(112760b) may suffer from a crash caused by invalid memory read.

Steps to Reproduce

==9749==ERROR: AddressSanitizer: SEGV on unknown address 0x6020060639d6 (pc 0x7f2e39bbca6a bp 0x7ffc674ae0d0 sp 0x7ffc674ad338 T0)
==9749==The signal is caused by a READ memory access.
    #0 0x7f2e39bbca69  (/usr/lib/x86_64-linux-gnu/
    #1 0x7f2e40f77c89 in ReadXWDImage /home/hongxu/work/imagemagick/ImageMagick-asan/coders/xwd.c:573:21
    #2 0x7f2e405308c9 in ReadImage /home/hongxu/work/imagemagick/ImageMagick-asan/MagickCore/constitute.c:547:15
    #3 0x7f2e405342d4 in ReadImages /home/hongxu/work/imagemagick/ImageMagick-asan/MagickCore/constitute.c:917:9
    #4 0x7f2e3fac69a4 in ConvertImageCommand /home/hongxu/work/imagemagick/ImageMagick-asan/MagickWand/convert.c:644:18
    #5 0x7f2e3fcae021 in MagickCommandGenesis /home/hongxu/work/imagemagick/ImageMagick-asan/MagickWand/mogrify.c:185:14
    #6 0x50c8a7 in MagickMain /home/hongxu/work/imagemagick/ImageMagick-asan/utilities/magick.c:149:10
    #7 0x50c301 in main /home/hongxu/work/imagemagick/ImageMagick-asan/utilities/magick.c:180:10
    #8 0x7f2e3891fb96 in __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:310
    #9 0x41ce19 in _start (/home/hongxu/work/imagemagick/ImageMagick-asan/install/bin/magick+0x41ce19)
  • Other information available here.

System Configuration

  • ImageMagick version: 7.0.8-41 Q16 x86_64 2019-04-20
  • Environment (Operating system, version and so on): Ubuntu 18.04 LTS x86_64
  • Additional information: This was firstly detected when fuzzing GraphicsMagick.
urban-warrior pushed a commit to ImageMagick/ImageMagick6 that referenced this issue Apr 20, 2019
urban-warrior pushed a commit that referenced this issue Apr 20, 2019

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commented Apr 20, 2019

Thanks for the problem report. We can reproduce it and will have a patch to fix it in GIT master branch @ later today. The patch will be available in the beta releases of ImageMagick @ by sometime tomorrow.

@dlemstra dlemstra added the bug label Apr 20, 2019
@dlemstra dlemstra added this to the 7.0.8-41 milestone Apr 20, 2019
@dlemstra dlemstra closed this Apr 22, 2019

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commented Aug 19, 2019

This was assigned CVE-2019-15139.

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