[Bug 1537420] [NEW] heap-buffer-overflow in coders/meta.c:496

Moshe Kaplan mk.moshe.kaplan at gmail.com
Sun Jan 24 01:20:42 UTC 2016 

*** This bug is a security vulnerability ***

Public security bug reported:

=================================================================
==19714==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2f02be0 at pc 0x85b330e bp 0xbfa4eb88 sp 0xbfa4eb80
READ of size 1 at 0xb2f02be0 thread T0
    #0 0x85b330d in parse8BIM /home/user/Desktop/ImageMagick/coders/meta.c:496
    #1 0x85b330d in ReadMETAImage /home/user/Desktop/ImageMagick/coders/meta.c:1201
    #2 0x8a9438a in ReadImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:494
    #3 0x8a9c1ff in ReadImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:844
    #4 0x9371649 in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4663
    #5 0x9379b31 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
    #6 0x910713d in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:474
    #7 0x910a4b5 in MagickImageCommand /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
    #8 0x910e999 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 0xb74a7a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
    #12 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

0xb2f02be0 is located 0 bytes to the right of 144-byte region [0xb2f02b50,0xb2f02be0)
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 0x8a9438a in ReadImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:494
    #4 0x8a9c1ff in ReadImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:844
    #5 0x9371649 in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4663
    #6 0x9379b31 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
    #7 0x910713d in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:474

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/ImageMagick/coders/meta.c:496 parse8BIM
Shadow bytes around the buggy address:
  0x365e0520: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0530: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0540: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x365e0560: 00 00 fa fa fa fa fa fa fa fa 00 00 00 00 00 00
=>0x365e0570: 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa fa fa
  0x365e0580: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
  0x365e0590: fd fd fd fd fd fd fa fa fa fa fa fa fa fa fd fd
  0x365e05a0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x365e05b0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x365e05c0: fd fd fd fd fd fd fd fd fd fd 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
==19714==ABORTING

** Affects: imagemagick (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1537420

Title:
  heap-buffer-overflow in coders/meta.c:496

Status in imagemagick package in Ubuntu:
  New

Bug description:
  =================================================================
  ==19714==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2f02be0 at pc 0x85b330e bp 0xbfa4eb88 sp 0xbfa4eb80
  READ of size 1 at 0xb2f02be0 thread T0
      #0 0x85b330d in parse8BIM /home/user/Desktop/ImageMagick/coders/meta.c:496
      #1 0x85b330d in ReadMETAImage /home/user/Desktop/ImageMagick/coders/meta.c:1201
      #2 0x8a9438a in ReadImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:494
      #3 0x8a9c1ff in ReadImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:844
      #4 0x9371649 in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4663
      #5 0x9379b31 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
      #6 0x910713d in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:474
      #7 0x910a4b5 in MagickImageCommand /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
      #8 0x910e999 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 0xb74a7a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #12 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

  0xb2f02be0 is located 0 bytes to the right of 144-byte region [0xb2f02b50,0xb2f02be0)
  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 0x8a9438a in ReadImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:494
      #4 0x8a9c1ff in ReadImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:844
      #5 0x9371649 in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4663
      #6 0x9379b31 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
      #7 0x910713d in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:474

  SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/ImageMagick/coders/meta.c:496 parse8BIM
  Shadow bytes around the buggy address:
    0x365e0520: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365e0530: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365e0540: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
    0x365e0550: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x365e0560: 00 00 fa fa fa fa fa fa fa fa 00 00 00 00 00 00
  =>0x365e0570: 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa fa fa
    0x365e0580: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
    0x365e0590: fd fd fd fd fd fd fa fa fa fa fa fa fa fa fd fd
    0x365e05a0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
    0x365e05b0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
    0x365e05c0: fd fd fd fd fd fd fd fd fd fd 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
  ==19714==ABORTING

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