[Bug 1537213] Re: heap-buffer-overflow in coders/hdr.c:622

[Moshe Kaplan]

This bug was found while fuzzing ImageMagick with afl-fuzz

Tested on ImageMagick version Tested on git commit
b5af2acfbf05cc6af1fc4a69d1fda2f497ca9719

Command: magick not_kiddy.hdr /dev/null

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Title:
  heap-buffer-overflow in coders/hdr.c:622

Status in imagemagick package in Ubuntu:
  New

Bug description:
  =================================================================
  ==29740==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb3302f40 at pc 0x85250f7 bp 0xbfa013a8 sp 0xbfa013a0
  READ of size 1 at 0xb3302f40 thread T0
      #0 0x85250f6 in HDRWriteRunlengthPixels /home/user/Desktop/ImageMagick/coders/hdr.c:622
      #1 0x85250f6 in WriteHDRImage /home/user/Desktop/ImageMagick/coders/hdr.c:808
      #2 0x8a9ec28 in WriteImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
      #3 0x8aa260c in WriteImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
      #4 0x9371c9f in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
      #5 0x9379ab1 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
      #6 0x9107fb3 in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
      #7 0x910a435 in MagickImageCommand /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
      #8 0x910e919 in MagickCommandGenesis /home/user/Desktop/ImageMagick/MagickWand/mogrify.c:172
      #9 0x80de12d in MagickMain /home/user/Desktop/ImageMagick/utilities/magick.c:74
      #10 0x80de12d in main /home/user/Desktop/ImageMagick/utilities/magick.c:85
      #11 0xb7475a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #12 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

  0xb3302f40 is located 0 bytes to the right of 128-byte region [0xb3302ec0,0xb3302f40)
  allocated by thread T0 here:
      #0 0x80c6b81 in malloc (/usr/local/bin/magick+0x80c6b81)
      #1 0x81932f9 in AcquireMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:475
      #2 0x81932f9 in AcquireQuantumMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:548
      #3 0x8a9ec28 in WriteImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
      #4 0x8aa260c in WriteImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
      #5 0x9371c9f in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
      #6 0x9379ab1 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
      #7 0x9107fb3 in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/ImageMagick/coders/hdr.c:622 HDRWriteRunlengthPixels
  Shadow bytes around the buggy address:
    0x36660590: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x366605a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x366605b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x366605c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x366605d0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  =>0x366605e0: 00 00 00 00 00 00 00 00[fa]fa fa fa fa fa fa fa
    0x366605f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
    0x36660600: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36660610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36660620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36660630: 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
  ==29740==ABORTING

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