*** 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 %s
Command: magick id:000102,sig:06,src:000277,op:int16,pos:140,val:+1024
/dev/null
=================================================================
==31973==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb4201d80 at
pc 0x866c0e6 bp 0xbfd4db78 sp 0xbfd4db70
WRITE of size 1 at 0xb4201d80 thread T0
#0 0x866c0e5 in EncodeRLE
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/pdb.c:691
#1 0x866c0e5 in WritePDBImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/pdb.c:884
#2 0x8a95688 in WriteImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:1091
#3 0x8a9906c in WriteImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:1309
#4 0x93762df in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4719
#5 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#6 0x910bd93 in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:526
#7 0x910e215 in MagickImageCommand
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:786
#8 0x91126f9 in MagickCommandGenesis
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/mogrify.c:172
#9 0x80de16d in MagickMain
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:74
#10 0x80de16d in main
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:85
#11 0xb74d3a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#12 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb4201d80 is located 0 bytes to the right of 96-byte region
[0xb4201d20,0xb4201d80)
allocated by thread T0 here:
#0 0x80c6bc1 in malloc (/usr/local/bin/magick+0x80c6bc1)
#1 0x81889a9 in AcquireMagickMemory
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:475
#2 0x81889a9 in AcquireQuantumMemory
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:548
#3 0x8a95688 in WriteImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:1091
#4 0x8a9906c in WriteImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:1309
#5 0x93762df in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4719
#6 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#7 0x910bd93 in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:526
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/pdb.c:691
EncodeRLE
Shadow bytes around the buggy address:
0x36840360: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36840370: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36840380: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36840390: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
0x368403a0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00
=>0x368403b0:[fa]fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x368403c0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x368403d0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x368403e0: fa fa fa fa fd fd fd fd fd fd fd fd fd fd fd fd
0x368403f0: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
0x36840400: 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
==31973==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1542107
Title:
out-of-bounds write in coders/pdb.c:691
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