*** This bug is a security vulnerability ***
Public security bug reported:
This bug was found while fuzzing ImageMagick with afl-fuzz
Tested on ImageMagick version Tested on git commit
8bc3ab67d818204fe5f0fe1dc29b873d37360461
Command: magick id:000122,sig:06,src:000277,op:havoc,rep:8 /dev/null
=================================================================
==13156==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb2f0300e at
pc 0x8196b43 bp 0xbf95b7c8 sp 0xbf95b7c0
WRITE of size 28 at 0xb2f0300e thread T0
#0 0x8196b42 in CopyMagickMemory
/home/user/Desktop/ImageMagick/MagickCore/memory.c:707:23
#1 0x86740c7 in EncodeRLE /home/user/Desktop/ImageMagick/coders/pdb.c:692
#2 0x86740c7 in WritePDBImage
/home/user/Desktop/ImageMagick/coders/pdb.c:906
#3 0x8a9e9d8 in WriteImage
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
#4 0x8aa23bc in WriteImages
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
#5 0x9371daf in CLINoImageOperator
/home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
#6 0x9379bc1 in CLIOption
/home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
#7 0x91080c3 in ProcessCommandOptions
/home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
#8 0x910a545 in MagickImageCommand
/home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:786
#9 0x910ea29 in MagickCommandGenesis
/home/user/Desktop/ImageMagick/MagickWand/mogrify.c:172
#10 0x80de12d in MagickMain
/home/user/Desktop/ImageMagick/utilities/magick.c:74
#11 0x80de12d in main /home/user/Desktop/ImageMagick/utilities/magick.c:85
#12 0xb74a1a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#13 0x80ddf54 in _start (/usr/local/bin/magick+0x80ddf54)
0xb2f0300e is located 14 bytes to the right of 128-byte region
[0xb2f02f80,0xb2f03000)
allocated by thread T0 here:
#0 0x80c6b81 in malloc (/usr/local/bin/magick+0x80c6b81)
#1 0x8193319 in AcquireMagickMemory
/home/user/Desktop/ImageMagick/MagickCore/memory.c:475
#2 0x8193319 in AcquireQuantumMemory
/home/user/Desktop/ImageMagick/MagickCore/memory.c:548
#3 0x8a9e9d8 in WriteImage
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1091
#4 0x8aa23bc in WriteImages
/home/user/Desktop/ImageMagick/MagickCore/constitute.c:1309
#5 0x9371daf in CLINoImageOperator
/home/user/Desktop/ImageMagick/MagickWand/operation.c:4697
#6 0x9379bc1 in CLIOption
/home/user/Desktop/ImageMagick/MagickWand/operation.c:5157
#7 0x91080c3 in ProcessCommandOptions
/home/user/Desktop/ImageMagick/MagickWand/magick-cli.c:526
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/ImageMagick/MagickCore/memory.c:707 CopyMagickMemory
Shadow bytes around the buggy address:
0x365e05b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e05c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e05d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e05e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x365e0600: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e0610: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e0620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e0630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e0640: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x365e0650: 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
==13156==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1539061
Title:
out-of-bounds write in MagickCore/memory.c:707:23
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