*** 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 <unknown>
Command: magick id:000097,sig:06,src:000777,op:flip4,pos:520 /dev/null
=================================================================
==31884==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2eff494 at
pc 0x8863b29 bp 0xbffefea8 sp 0xbffefea0
READ of size 1 at 0xb2eff494 thread T0
#0 0x8863b28 in ReadVIFFImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/coders/viff.c:692:35
#1 0x8a8b8d8 in ReadImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:494
#2 0x8a9374f in ReadImages
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:844
#3 0x93759a9 in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4680
#4 0x937de91 in CLIOption
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
#5 0x910affd in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:474
#6 0x910e375 in MagickImageCommand
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:786
#7 0x9112859 in MagickCommandGenesis
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/mogrify.c:172
#8 0x80de16d in MagickMain
/home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:74
#9 0x80de16d in main
/home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:85
#10 0xb7477a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#11 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb2eff494 is located 0 bytes to the right of 1447038100-byte region
[0x5cafe800,0xb2eff494)
allocated by thread T0 here:
#0 0x80c6bc1 in malloc (/usr/local/bin/magick+0x80c6bc1)
#1 0x81888e9 in AcquireMagickMemory
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/memory.c:475
#2 0x81888e9 in AcquireQuantumMemory
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/memory.c:548
#3 0x8a8b8d8 in ReadImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:494
#4 0x8a9374f in ReadImages
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:844
#5 0x93759a9 in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4680
#6 0x937de91 in CLIOption
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
#7 0x910affd in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:474
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/FuzzImageMagick/ImageMagick/coders/viff.c:692 ReadVIFFImage
Shadow bytes around the buggy address:
0x365dfe40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x365dfe50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x365dfe60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x365dfe70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x365dfe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x365dfe90: 00 00[04]fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365dfea0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365dfeb0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365dfec0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365dfed0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365dfee0: 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
==31884==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1545183
Title:
out-of-bounds read in ImageMagick/coders/viff.c:692:35
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