[Bug 1533449] Re: heap-buffer-overflow in coders/pict.c:633 EncodeImage

[Moshe Kaplan]

** Information type changed from Private Security to Public Security

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Title:
  out-of-bounds read in coders/pict.c:633 EncodeImage

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:

  =================================================================
  ==5220==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb250a3ff at pc 0x86bb4a2 bp 0xbfe45278 sp 0xbfe45270
  READ of size 1 at 0xb250a3ff thread T0
      #0 0x86bb4a1 in EncodeImage /home/user/Desktop/imagemagick_reporting/ImageMagick/coders/pict.c:633
      #1 0x86b88da in WritePICTImage /home/user/Desktop/imagemagick_reporting/ImageMagick/coders/pict.c:2006
      #2 0x8a96298 in WriteImage /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:1091
      #3 0x8a99c7c in WriteImages /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:1309
      #4 0x9375b7f in CLINoImageOperator /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:4697
      #5 0x937d98f in CLIOption /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:5157
      #6 0x910bea3 in ProcessCommandOptions /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:526
      #7 0x910e325 in MagickImageCommand /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:786
      #8 0x9112809 in MagickCommandGenesis /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/mogrify.c:172
      #9 0x80de10d in MagickMain /home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick.c:74
      #10 0x80de10d in main /home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick.c:85
      #11 0xb7559a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #12 0x80ddf34 in _start (/home/user/Desktop/imagemagick_reporting/ImageMagick/utilities/magick+0x80ddf34)

  0xb250a3ff is located 1 bytes to the left of 32768-byte region [0xb250a400,0xb2512400)
  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 0x8a96298 in WriteImage /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:1091
      #4 0x8a99c7c in WriteImages /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickCore/constitute.c:1309
      #5 0x9375b7f in CLINoImageOperator /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:4697
      #6 0x937d98f in CLIOption /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/operation.c:5157
      #7 0x910bea3 in ProcessCommandOptions /home/user/Desktop/imagemagick_reporting/ImageMagick/MagickWand/magick-cli.c:526

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/imagemagick_reporting/ImageMagick/coders/pict.c:633 EncodeImage
  Shadow bytes around the buggy address:
    0x364a1420: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x364a1430: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x364a1440: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x364a1450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x364a1460: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  =>0x364a1470: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]
    0x364a1480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x364a1490: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x364a14a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x364a14b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x364a14c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  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
  ==5220==ABORTING

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