*** This bug is a security vulnerability ***
Public security bug reported:
This bug was found while fuzzing ImageMagick with afl-fuzz
Tested on ImageMagick git commit
5572ef67a81385837decff3746026b9abfd4a599
Command: magick id:000351,sig:06,src:005875,op:havoc,rep:128 /dev/null
=================================================================
==21278==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb5404cc0 at
pc 0x8fc9cf8 bp 0xbfd29cd8 sp 0xbfd29cd0
WRITE of size 2 at 0xb5404cc0 thread T0
#0 0x8fc9cf7 in ImportCbYCrYQuantum
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/./MagickCore/pixel-accessor.h:839
#1 0x8fc9cf7 in ImportQuantumPixels
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/quantum-import.c:4183
#2 0x84b5417 in ReadDPXImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/dpx.c:1266
#3 0x8a8b0fa in ReadImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
#4 0x8a92f6f in ReadImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
#5 0x9375259 in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4680
#6 0x937d741 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5174
#7 0x910a89d in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:474
#8 0x910dc15 in MagickImageCommand
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:786
#9 0x91120f9 in MagickCommandGenesis
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/mogrify.c:172
#10 0x80de16d in MagickMain
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:74
#11 0x80de16d in main
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:85
#12 0xb74f9a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#13 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb5404cc0 is located 0 bytes to the right of 4032-byte region
[0xb5403d00,0xb5404cc0)
allocated by thread T0 here:
#0 0x80c7061 in __interceptor_posix_memalign
(/usr/local/bin/magick+0x80c7061)
#1 0x81881bf in AcquireAlignedMemory
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:273
#2 0x89a8e5e in OpenPixelCache
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/cache.c:3402
#3 0x89b5d3f in GetImagePixelCache
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/cache.c:1583
#4 0x89c2c29 in SyncImagePixelCache
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/cache.c:5023
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/./MagickCore/pixel-accessor.h:839
ImportCbYCrYQuantum
Shadow bytes around the buggy address:
0x36a80940: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x36a80950: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x36a80960: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x36a80970: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x36a80980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x36a80990: 00 00 00 00 00 00 00 00[fa]fa fa fa fa fa fa fa
0x36a809a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36a809b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36a809c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36a809d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36a809e0: 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
==21278==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1542785
Title:
out-of-bounds write in ./MagickCore/pixel-accessor.h:839
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