*** 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
26ac8585e46188a648abf5fa3a1a7d264d8b3cb9
Command: magick id:000419,sig:06,src:001803+004110,op:splice,rep:2
/dev/null
=================================================================
==21785==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb5f02440 at
pc 0x80b28f6 bp 0xbfc57ed8 sp 0xbfc57abc
READ of size 128 at 0xb5f02440 thread T0
#0 0x80b28f5 in memcpy (/usr/local/bin/magick+0x80b28f5)
#1 0x814f571 in CopyMagickMemory
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:708
#2 0x857643b in WritePDBImage
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/coders/pdb.c:893
#3 0x89633b8 in WriteImage
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1091
#4 0x8966d9c in WriteImages
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1309
#5 0x9230a7f in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:4730
#6 0x9238891 in CLIOption
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:5190
#7 0x8fc3893 in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:526
#8 0x8fc5d15 in MagickImageCommand
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:786
#9 0x8fca1f9 in MagickCommandGenesis
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/mogrify.c:172
#10 0x80ddf3d in MagickMain
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/utilities/magick.c:74
#11 0x80ddf3d in main
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/utilities/magick.c:85
#12 0xb74b1a82 in __libc_start_main
/build/eglibc-617sU_/eglibc-2.19/csu/libc-start.c:287
#13 0x80ddd64 in _start (/usr/local/bin/magick+0x80ddd64)
0xb5f02440 is located 0 bytes to the right of 256-byte region
[0xb5f02340,0xb5f02440)
allocated by thread T0 here:
#0 0x80c6991 in malloc (/usr/local/bin/magick+0x80c6991)
#1 0x814e9ea in AcquireMagickMemory
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:476
#2 0x814e9ea in AcquireQuantumMemory
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/memory.c:549
#3 0x89633b8 in WriteImage
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1091
#4 0x8966d9c in WriteImages
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickCore/constitute.c:1309
#5 0x9230a7f in CLINoImageOperator
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:4730
#6 0x9238891 in CLIOption
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/operation.c:5190
#7 0x8fc3893 in ProcessCommandOptions
/home/user/Desktop/FuzzImageMagick-master/ImageMagick/MagickWand/magick-cli.c:526
SUMMARY: AddressSanitizer: heap-buffer-overflow ??:0 memcpy
Shadow bytes around the buggy address:
0x36be0430: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be0440: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be0450: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be0460: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
0x36be0470: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x36be0480: 00 00 00 00 00 00 00 00[fa]fa fa fa fa fa fa fa
0x36be0490: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be04a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be04b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be04c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36be04d0: 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
==21785==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1553366
Title:
out-of-bounds read in MagickCore/memory.c:708
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