[Bug 1533447] Re: out-of-bounds read in coders/sun.c:499 ReadSUNImage

[Moshe Kaplan]

** Attachment added: "poc2_sun.c_501"
   https://bugs.launchpad.net/ubuntu/+source/imagemagick/+bug/1533447/+attachment/4550177/+files/id%3A000031%2Csig%3A06%2Csrc%3A001500%2Cop%3Aflip1%2Cpos%3A15

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Title:
  out-of-bounds read in coders/sun.c:499 ReadSUNImage

Status in imagemagick package in Ubuntu:
  New

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

  Tested on ImageMagick version d8382f9c0ffa52057271a6a323e7e062f0fe4ff6

  Command: magick infile /dev/null

  Build info:

  #Configure command:
  CC=afl-clang-fast CXX=afl-clang-fast++ ./configure --with-bzlib=no --with-djvu=no --with-dps=no --with-fftw=no --with-fpx=no --with-fontconfig=no --with-freetype=no --with-gvc=no --with-jbig=no --with-jpeg=no --with-lcms=no --with-lqr=no --with-ltdl=no --with-lzma=no --with-openexr=no --with-openjp2=no --with-pango=no --with-png=no --with-tiff=no --with-wmf=no --with-x=no --with-xml=no --with-zlib=no --enable-hdri=no --enable-shared=no

  #Make command:
  CC=afl-clang-fast CXX=afl-clang-fast++ make

  
  ASAN output:

  =================================================================
  ==16603==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2e03bd2 at pc 0x8806136 bp 0xbfca7738 sp 0xbfca7730
  READ of size 1 at 0xb2e03bd2 thread T0
      #0 0x8806135 in ReadSUNImage /home/user/Desktop/imagemagick_reporting/ImageMagick/coders/sun.c:499:35
      #1 0x8a8b97a in ReadImage /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:494
      #2 0x8a937ef in ReadImages /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:844
      #3 0x93754a9 in CLINoImageOperator /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:4663
      #4 0x937d98f in CLIOption /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:5157
      #5 0x910afad in ProcessCommandOptions /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:474
      #6 0x910e325 in MagickImageCommand /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:786
      #7 0x9112809 in MagickCommandGenesis /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/mogrify.c:172
      #8 0x80de10d in MagickMain /home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick.c:74
      #9 0x80de10d in main /home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick.c:85
      #10 0xb7565a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #11 0x80ddf34 in _start (/home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick+0x80ddf34)

  0xb2e03bd2 is located 0 bytes to the right of 2898-byte region [0xb2e03080,0xb2e03bd2)
  allocated by thread T0 here:
      #0 0x80c6b61 in malloc (/home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick+0x80c6b61)
      #1 0x81939e9 in AcquireMagickMemory /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/memory.c:463
      #2 0x81939e9 in AcquireQuantumMemory /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/memory.c:539
      #3 0x8a8b97a in ReadImage /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:494
      #4 0x8a937ef in ReadImages /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:844
      #5 0x93754a9 in CLINoImageOperator /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:4663
      #6 0x937d98f in CLIOption /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:5157
      #7 0x910afad in ProcessCommandOptions /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:474

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/imagemagick_reporting/ImageMagick/coders/sun.c:499 ReadSUNImage
  Shadow bytes around the buggy address:
    0x365c0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x365c0730: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x365c0740: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x365c0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x365c0760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  =>0x365c0770: 00 00 00 00 00 00 00 00 00 00[02]fa fa fa fa fa
    0x365c0780: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365c0790: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365c07a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365c07b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365c07c0: 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
  ==16603==ABORTING

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