out-of-bounds write in MagickCore/memory.c:707:23

[Moshe Kaplan]

This bug was found while fuzzing ImageMagick with afl-fuzz

Tested on ImageMagick version Tested on git commit 8bc3ab67d818204fe5f0fe1dc29b873d37360461

Command: magick id:000122,sig:06,src:000277,op:havoc,rep:8 /dev/null

=================================================================
==13156==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2f0300e at pc 0x8196b43 bp 0xbf95b7c8 sp 0xbf95b7c0
WRITE of size 28 at 0xb2f0300e thread T0
    #0 0x8196b42 in CopyMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:707:23
    #1 0x86740c7 in EncodeRLE /home/user/Desktop/ImageMagick/coders/pdb.c:692
    #2 0x86740c7 in WritePDBImage /home/user/Desktop/ImageMagick/coders/pdb.c:906
    #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 0xb74a1a82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
    #13 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

0xb2f0300e is located 14 bytes to the right of 128-byte region [0xb2f02f80,0xb2f03000)
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
    #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

SUMMARY: AddressSanitizer: heap-buffer-overflow /home/user/Desktop/ImageMagick/MagickCore/memory.c:707 CopyMagickMemory
Shadow bytes around the buggy address:
  0x365e05b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e05c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e05d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e05e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x365e0600: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0640: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x365e0650: 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
==13156==ABORTING

[Moshe Kaplan (moshekaplan)]

input file to trigger crash

[Moshe Kaplan (moshekaplan)]

Reported upstream at: https://github.com/ImageMagick/ImageMagick/issues/107

[Launchpad Janitor (janitor)]

This bug was fixed in the package imagemagick - 8:6.9.6.6+dfsg-1ubuntu3

---------------
imagemagick (8:6.9.6.6+dfsg-1ubuntu3) zesty; urgency=medium

  * debian/patches/0020-Revert-GradientImage-change.patch: Revert patch
    per https://github.com/ImageMagick/ImageMagick/issues/316. Thanks
    to Cristy <email address hidden>. Closes LP: #1645406.

 -- Nishanth Aravamudan <email address hidden> Tue, 06 Dec 2016 17:26:36 +0100