out-of-bounds read 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:000114,sig:06,src:000277,op:havoc,rep:2 /dev/null

=================================================================
==13122==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb5f0ac8c at pc 0x8196b5b bp 0xbf86ba88 sp 0xbf86ba80
READ of size 128 at 0xb5f0ac8c thread T0
    #0 0x8196b5a in CopyMagickMemory /home/user/Desktop/ImageMagick/MagickCore/memory.c:707:23
    #1 0x8672c7b in WritePDBImage /home/user/Desktop/ImageMagick/coders/pdb.c:893
    #2 0x8a9e9d8 in WriteImage /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
    #3 0x8aa23bc in WriteImages /home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
    #4 0x9371daf in CLINoImageOperator /home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
    #5 0x9379bc1 in CLIOption /home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
    #6 0x91080c3 in ProcessCommandOptions /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
    #7 0x910a545 in MagickImageCommand /home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
    #8 0x910ea29 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 0xb749fa82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
    #12 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)

0xb5f0ac8c is located 12 bytes to the right of 256-byte region [0xb5f0ab80,0xb5f0ac80)
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:
  0x36be1540: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be1550: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be1560: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be1570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x36be1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x36be1590: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be15a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be15b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x36be15c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x36be15d0: 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa
  0x36be15e0: 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
==13122==ABORTING

[Moshe Kaplan (moshekaplan)]

input file to trigger crash

[Moshe Kaplan (moshekaplan)]

Reported and fixed upstream at: https://github.com/ImageMagick/ImageMagick/issues/106