*** This bug is a security vulnerability ***
Public security bug reported:
=================================================================
==20038==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb470485c at
pc 0x8dd722a bp 0xbf92c668 sp 0xbf92c660
READ of size 4 at 0xb470485c thread T0
#0 0x8dd7229 in GetPixelInfoLuma
/home/user/Desktop/ImageMagick/./MagickCore/pixel-accessor.h:234
#1 0x8dd7229 in AssignImageColors
/home/user/Desktop/ImageMagick/MagickCore/quantize.c:657
#2 0x8db65bb in QuantizeImage
/home/user/Desktop/ImageMagick/MagickCore/quantize.c:2778
#3 0x8943662 in SetImageType
/home/user/Desktop/ImageMagick/MagickCore/attribute.c:1264
#4 0x86e4989 in WritePNMImage
/home/user/Desktop/ImageMagick/coders/pnm.c:1914
#5 0x8a9eca8 in WriteImage
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
#6 0x8aa285b in WriteImages
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
#7 0x9371d1f in CLINoImageOperator
/home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
#8 0x9379b31 in CLIOption
/home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
#9 0x9108033 in ProcessCommandOptions
/home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
#10 0x910a4b5 in MagickImageCommand
/home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
#11 0x910e999 in MagickCommandGenesis
/home/user/Desktop/ImageMagick/MagickWand/mogrify.c:172
#12 0x80de12d in MagickMain
/home/user/Desktop/ImageMagick/utilities/magick.c:74
#13 0x80de12d in main /home/user/Desktop/ImageMagick/utilities/magick.c:85
#14 0xb74a6a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#15 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)
0xb470485c is located 4 bytes to the right of 56-byte region
[0xb4704820,0xb4704858)
allocated by thread T0 here:
#0 0x80c6dc1 in realloc (/usr/local/bin/magick+0x80c6dc1)
#1 0x819832a in ResizeMagickMemory
/home/user/Desktop/ImageMagick/MagickCore/memory.c:1161
#2 0x819832a in ResizeQuantumMemory
/home/user/Desktop/ImageMagick/MagickCore/memory.c:1225
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/ImageMagick/./MagickCore/pixel-accessor.h:234
GetPixelInfoLuma
Shadow bytes around the buggy address:
0x368e08b0: 00 00 00 00 00 00 00 04 fa fa fa fa 00 00 00 00
0x368e08c0: 00 00 00 04 fa fa fa fa 00 00 00 00 00 00 00 04
0x368e08d0: fa fa fa fa 00 00 00 00 00 00 00 04 fa fa fa fa
0x368e08e0: 00 00 00 00 00 00 00 04 fa fa fa fa 00 00 00 00
0x368e08f0: 00 00 00 04 fa fa fa fa 00 00 00 00 00 00 00 04
=>0x368e0900: fa fa fa fa 00 00 00 00 00 00 00[fa]fa fa fa fa
0x368e0910: 00 00 00 00 00 00 00 04 fa fa fa fa 00 00 00 00
0x368e0920: 00 00 00 04 fa fa fa fa 00 00 00 00 00 00 00 04
0x368e0930: fa fa fa fa 00 00 00 00 00 00 00 04 fa fa fa fa
0x368e0940: 00 00 00 00 00 00 00 04 fa fa fa fa 00 00 00 00
0x368e0950: 00 00 00 04 fa fa fa fa 00 00 00 00 00 00 00 04
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
==20038==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1537423
Title:
heap-buffer-overflow in ./MagickCore/pixel-accessor.h:234
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