[Bug 1545180] Re: out-of-bounds write in coders/psd.c:2225

[Moshe Kaplan]

https://github.com/ImageMagick/ImageMagick/issues/128

** Summary changed:

- out-of-bounds write in fuzz_results_2016_02_12/fuzzer01/crashes/id:000043,sig:06,src:000224,op:flip1,pos:15' @ error/psd.c/ReadPSDChannelRLE/1002.
+ out-of-bounds write in coders/psd.c:2225

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Title:
  out-of-bounds write in coders/psd.c:2225

Status in imagemagick package in Ubuntu:
  New

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

  Tested on ImageMagick git commit <unknown>

  Command: magick id:000043,sig:06,src:000224,op:flip1,pos:15 /dev/null

  magick: InvalidLength `/home/user/Desktop/FuzzImageMagick/fuzz_results_2016_02_12/fuzzer01/crashes/id:000043,sig:06,src:000224,op:flip1,pos:15' @ error/psd.c/ReadPSDChannelRLE/1002.
  =================================================================
  ==31657==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb4003bc1 at pc 0x8767a1a bp 0xbfe4ba18 sp 0xbfe4ba10
  WRITE of size 1 at 0xb4003bc1 thread T0
      #0 0x8767a19 in PSDPackbitsEncodeImage /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2225
      #1 0x87648eb in WritePackbitsLength /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2289
      #2 0x876123f in WriteImageChannels /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2389
      #3 0x875dd8c in WritePSDImage /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2974
      #4 0x8a961f8 in WriteImage /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:1091
      #5 0x8a99bdc in WriteImages /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:1309
      #6 0x937607f in CLINoImageOperator /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4714
      #7 0x937de91 in CLIOption /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
      #8 0x910bef3 in ProcessCommandOptions /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:526
      #9 0x910e375 in MagickImageCommand /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:786
      #10 0x9112859 in MagickCommandGenesis /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/mogrify.c:172
      #11 0x80de16d in MagickMain /home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:74
      #12 0x80de16d in main /home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:85
      #13 0xb74dba82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #14 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)

  0xb4003bc1 is located 0 bytes to the right of 257-byte region [0xb4003ac0,0xb4003bc1)
  allocated by thread T0 here:
      #0 0x80c6bc1 in malloc (/usr/local/bin/magick+0x80c6bc1)
      #1 0x81888e9 in AcquireMagickMemory /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/memory.c:475
      #2 0x81888e9 in AcquireQuantumMemory /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/memory.c:548
      #3 0x875dd8c in WritePSDImage /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2974
      #4 0x8a961f8 in WriteImage /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:1091
      #5 0x8a99bdc in WriteImages /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:1309
      #6 0x937607f in CLINoImageOperator /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4714
      #7 0x937de91 in CLIOption /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
      #8 0x910bef3 in ProcessCommandOptions /home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:526

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/FuzzImageMagick/ImageMagick/coders/psd.c:2225 PSDPackbitsEncodeImage
  Shadow bytes around the buggy address:
    0x36800720: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36800730: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36800740: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36800750: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
    0x36800760: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  =>0x36800770: 00 00 00 00 00 00 00 00[01]fa fa fa fa fa fa fa
    0x36800780: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
    0x36800790: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x368007a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04
    0x368007b0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
    0x368007c0: 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
  ==31657==ABORTING

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