[Bug 1553366] Re: out-of-bounds read in MagickCore/memory.c:708

[Marc Deslauriers]

** Changed in: imagemagick (Ubuntu)
       Status: New => Confirmed

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Title:
  out-of-bounds read in MagickCore/memory.c:708

Status in imagemagick package in Ubuntu:
  Confirmed

Bug description:
  This bug was found while fuzzing ImageMagick with afl-fuzz

  Tested on ImageMagick git commit
  26ac8585e46188a648abf5fa3a1a7d264d8b3cb9

  Command: magick id:000419,sig:06,src:001803+004110,op:splice,rep:2
  /dev/null

  =================================================================
  ==21785==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb5f02440 at pc 0x80b28f6 bp 0xbfc57ed8 sp 0xbfc57abc
  READ of size 128 at 0xb5f02440 thread T0
      #0 0x80b28f5 in memcpy (/usr/local/bin/magick+0x80b28f5)
      #1 0x814f571 in CopyMagickMemory /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:708
      #2 0x857643b in WritePDBImage /home/user/Desktop/FuzzImageMagick-master/ImageMagick/coders/pdb.c:893
      #3 0x89633b8 in WriteImage /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1091
      #4 0x8966d9c in WriteImages /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1309
      #5 0x9230a7f in CLINoImageOperator /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:4730
      #6 0x9238891 in CLIOption /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:5190
      #7 0x8fc3893 in ProcessCommandOptions /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:526
      #8 0x8fc5d15 in MagickImageCommand /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:786
      #9 0x8fca1f9 in MagickCommandGenesis /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/mogrify.c:172
      #10 0x80ddf3d in MagickMain /home/user/Desktop/FuzzImageMagick-master/ImageMagick/utilities/magick.c:74
      #11 0x80ddf3d in main /home/user/Desktop/FuzzImageMagick-master/ImageMagick/utilities/magick.c:85
      #12 0xb74b1a82 in __libc_start_main /build/eglibc-617sU_/eglibc-2.19/csu/libc-start.c:287
      #13 0x80ddd64 in _start (/usr/local/bin/magick+0x80ddd64)

  0xb5f02440 is located 0 bytes to the right of 256-byte region [0xb5f02340,0xb5f02440)
  allocated by thread T0 here:
      #0 0x80c6991 in malloc (/usr/local/bin/magick+0x80c6991)
      #1 0x814e9ea in AcquireMagickMemory /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:476
      #2 0x814e9ea in AcquireQuantumMemory /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:549
      #3 0x89633b8 in WriteImage /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1091
      #4 0x8966d9c in WriteImages /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1309
      #5 0x9230a7f in CLINoImageOperator /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:4730
      #6 0x9238891 in CLIOption /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:5190
      #7 0x8fc3893 in ProcessCommandOptions /home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:526

  SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 memcpy
  Shadow bytes around the buggy address:
    0x36be0430: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be0440: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be0450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be0460: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
    0x36be0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  =>0x36be0480: 00 00 00 00 00 00 00 00[fa]fa fa fa fa fa fa fa
    0x36be0490: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be04a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be04b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be04c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36be04d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  Shadow byte legend (one shadow byte represents 8 application bytes):
    Addressable:           00
    Partially addressable: 01 02 03 04 05 06 07 
    Heap left redzone:     fa
    Heap right redzone:    fb
    Freed heap region:     fd
    Stack left redzone:    f1
    Stack mid redzone:     f2
    Stack right redzone:   f3
    Stack partial redzone: f4
    Stack after return:    f5
    Stack use after scope: f8
    Global redzone:        f9
    Global init order:     f6
    Poisoned by user:      f7
    ASan internal:         fe
  ==21785==ABORTING

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