*** 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:000338,sig:06,src:005458,op:havoc,rep:8 /dev/null
=================================================================
==1020==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb5e108eb at
pc 0x889da35 bp 0xbffa92f8 sp 0xbffa92f0
READ of size 1 at 0xb5e108eb thread T0
#0 0x889da34 in InsertRow
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/wpg.c:342:19
#1 0x8886e51 in ReadWPGImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/wpg.c:1341
#2 0x8a8ad6a in ReadImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
#3 0x8a92bdf in ReadImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
#4 0x9375c09 in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4685
#5 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#6 0x910ae9d in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:474
#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 0xb7525a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#12 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb5e108eb is located 0 bytes to the right of 27-byte region
[0xb5e108d0,0xb5e108eb)
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 0x8a8ad6a in ReadImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
#4 0x8a92bdf in ReadImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
#5 0x9375c09 in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4685
#6 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#7 0x910ae9d in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:474
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/wpg.c:342
InsertRow
Shadow bytes around the buggy address:
0x36bc20c0: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
0x36bc20d0: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
0x36bc20e0: fd fd fa fa fd fd fd fd fa fa fd fd fd fd fa fa
0x36bc20f0: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
0x36bc2100: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
=>0x36bc2110: fd fd fa fa fd fd fd fd fa fa 00 00 00[03]fa fa
0x36bc2120: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
0x36bc2130: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
0x36bc2140: fd fd fa fa fd fd fd fd fa fa fd fd fd fd fa fa
0x36bc2150: fd fd fd fd fa fa fd fd fd fd fa fa fd fd fd fd
0x36bc2160: fa fa fd fd fd fd fa fa fd fd fd fd fa fa fd fd
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
==1020==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1542114
Title:
out-of-bounds read in coders/wpg.c:342:19
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