[Bug 1539066] Re: out-of-bounds read in MagickCore/memory.c:718:10

[Marc Deslauriers]

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

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Title:
  out-of-bounds read in MagickCore/memory.c:718:10

Status in imagemagick package in Ubuntu:
  Confirmed

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

  Tested on ImageMagick version Tested on git commit
  8bc3ab67d818204fe5f0fe1dc29b873d37360461

  Command: magick id:000204,sig:06,src:003533,op:havoc,rep:4 /dev/null

  =================================================================
  ==14255==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb540771c at pc 0x8196d1f bp 0xbfdec968 sp 0xbfdec960
  READ of size 5632 at 0xb540771c thread T0
      #0 0x8196d1e in CopyMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:718:10
      #1 0x8763497 in RemoveResolutionFromResourceBlock /home/user/Desktop/ImageMagick/coders/psd.c:2617
      #2 0x8763497 in WritePSDImage /home/user/Desktop/ImageMagick/coders/psd.c:2775
      #3 0x8a9e9d8 in WriteImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
      #4 0x8aa23bc in WriteImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
      #5 0x9371daf in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
      #6 0x9379bc1 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
      #7 0x91080c3 in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
      #8 0x910a545 in MagickImageCommand /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
      #9 0x910ea29 in MagickCommandGenesis /home/user/Desktop/ImageMagick/MagickWand/mogrify.c:172
      #10 0x80de12d in MagickMain /home/user/Desktop/ImageMagick/utilities/magick.c:74
      #11 0x80de12d in main /home/user/Desktop/ImageMagick/utilities/magick.c:85
      #12 0xb751ba82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #13 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

  0xb540771c is located 540 bytes to the right of 4096-byte region [0xb5406500,0xb5407500)
  freed by thread T0 here:
      #0 0x80c69c1 in __interceptor_free (/usr/local/bin/magick+0x80c69c1)
      #1 0x8197c58 in RelinquishMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:974

  previously allocated by thread T0 here:
      #0 0x80c6b81 in malloc (/usr/local/bin/magick+0x80c6b81)
      #1 0x8193319 in AcquireMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:475
      #2 0x8193319 in AcquireQuantumMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:548

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/ImageMagick/MagickCore/memory.c:718 CopyMagickMemory
  Shadow bytes around the buggy address:
    0x36a80e90: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
    0x36a80ea0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80eb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80ec0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80ed0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  =>0x36a80ee0: fa fa fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80ef0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80f00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80f10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80f20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x36a80f30: 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
  ==14255==ABORTING

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