*** 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:000169,sig:06,src:000734+004696,op:splice,rep:128
/dev/null
=================================================================
==32731==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb3503080 at
pc 0x8652c1c bp 0xbfc261a8 sp 0xbfc261a0
READ of size 1 at 0xb3503080 thread T0
#0 0x8652c1b in ReadPCXImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/pcx.c:536
#1 0x8a8ad6a in ReadImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
#2 0x8a92bdf in ReadImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
#3 0x9375c09 in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4685
#4 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#5 0x910ae9d in ProcessCommandOptions
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:474
#6 0x910e215 in MagickImageCommand
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:786
#7 0x91126f9 in MagickCommandGenesis
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/mogrify.c:172
#8 0x80de16d in MagickMain
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:74
#9 0x80de16d in main
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:85
#10 0xb7477a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#11 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)
0xb3503080 is located 0 bytes to the right of 2048-byte region
[0xb3502880,0xb3503080)
allocated by thread T0 here:
#0 0x80c7061 in __interceptor_posix_memalign
(/usr/local/bin/magick+0x80c7061)
#1 0x8189123 in AcquireAlignedMemory
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:273
#2 0x8189123 in AcquireVirtualMemory
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:597
#3 0x864a867 in ReadPCXImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/pcx.c:394
#4 0x8a8ad6a in ReadImage
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
#5 0x8a92bdf in ReadImages
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
#6 0x9375c09 in CLINoImageOperator
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4685
#7 0x937e0f1 in CLIOption
/home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
#8 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/pcx.c:536
ReadPCXImage
Shadow bytes around the buggy address:
0x366a05c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x366a05d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x366a05e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x366a05f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x366a0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x366a0610:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x366a0620: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x366a0630: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x366a0640: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x366a0650: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
0x366a0660: fd fd fd fd fd fd fd fd fd fd fd fd fd fd 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
==32731==ABORTING
** Affects: imagemagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1542109
Title:
out-of-bounds read in coders/pcx.c:536
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