*** 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:000224,sig:06,src:004192+004496,op:splice,rep:128
/dev/null
=================================================================
==4438==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb48075b4 at
pc 0x8596f01 bp 0xbfa1e608 sp 0xbfa1e600
READ of size 4 at 0xb48075b4 thread T0
#0 0x8596f00 in CalcMinMax
/home/user/Desktop/FuzzImageMagick/ImageMagick/coders/mat.c:406
#1 0x8588988 in ReadMATImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/coders/mat.c:939
#2 0x8a60c98 in ReadImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:494
#3 0x8a68b0f in ReadImages
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:844
#4 0x92aee29 in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4680
#5 0x92b7311 in CLIOption
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
#6 0x904447d in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:474
#7 0x90477f5 in MagickImageCommand
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:786
#8 0x904bcd9 in MagickCommandGenesis
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/mogrify.c:172
#9 0x80de16d in MagickMain
/home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:74
#10 0x80de16d in main
/home/user/Desktop/FuzzImageMagick/ImageMagick/utilities/magick.c:85
#11 0xb74dda82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#12 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb48075b6 is located 0 bytes to the right of 54-byte region
[0xb4807580,0xb48075b6)
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 0x8a60c98 in ReadImage
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:494
#4 0x8a68b0f in ReadImages
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickCore/constitute.c:844
#5 0x92aee29 in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:4680
#6 0x92b7311 in CLIOption
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/operation.c:5174
#7 0x904447d in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick/ImageMagick/MagickWand/magick-cli.c:474
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/FuzzImageMagick/ImageMagick/coders/mat.c:406 CalcMinMax
Shadow bytes around the buggy address:
0x36900e60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36900e70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36900e80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36900e90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36900ea0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x36900eb0: 00 00 00 00 00 00[06]fa fa fa fa fa 00 00 00 00
0x36900ec0: 00 00 05 fa fa fa fa fa 00 00 00 00 00 00 05 fa
0x36900ed0: fa fa fa fa fd fd fd fd fd fd fd fa fa fa fa fa
0x36900ee0: fd fd fd fd fd fd fd fa fa fa fa fa 00 00 00 00
0x36900ef0: 00 00 00 04 fa fa fa fa 00 00 00 00 00 00 00 04
0x36900f00: 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
==4438==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1545366
Title:
out-of-bounds read in ImageMagick/coders/mat.c:406
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