*** This bug is a security vulnerability ***
Public security bug reported:
This bug was found while fuzzing graphicsmagick with afl-fuzz
Tested on hg changeset 14720:3b1f1e0c1098
Command: gm convert id:000063,sig:06,src:000084,op:flip1,pos:28
/dev/null
=================================================================
==30047==ERROR: AddressSanitizer: heap-buffer-overflow on address 0xb3c03ffc at
pc 0x88a783e bp 0xbf9d76e8 sp 0xbf9d76e0
READ of size 4 at 0xb3c03ffc thread T0
#0 0x88a783d in ReadPSDImage
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/coders/psd.c:1435
#1 0x8244d62 in ReadImage
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/magick/constitute.c:1607
#2 0x812c3ac in ConvertImageCommand
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/magick/command.c:4348
#3 0x8165066 in MagickCommand
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/magick/command.c:8862
#4 0x81ed0dc in GMCommandSingle
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/magick/command.c:17338
#5 0x81ea204 in GMCommand
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/magick/command.c:17391
#6 0x80d4a76 in main
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/utilities/gm.c:61
#7 0xb7508a82 in __libc_start_main
/build/buildd/eglibc-2.19/csu/libc-start.c:287
#8 0x80d4904 in _start
(/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/utilities/gm+0x80d4904)
AddressSanitizer can not describe address in more detail (wild memory access
suspected).
SUMMARY: AddressSanitizer: heap-buffer-overflow
/home/user/Desktop/graphicsmagick_fuzz_results/graphicsmagick/coders/psd.c:1435
ReadPSDImage
Shadow bytes around the buggy address:
0x367807a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x367807b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x367807c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x367807d0: 00 00 00 00 00 00 04 fa fa fa fa fa fa fa fa fa
0x367807e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x367807f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]
0x36780800: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36780810: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36780820: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36780830: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x36780840: 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
==30047==ABORTING
** Affects: graphicsmagick (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1537803
Title:
out-of-bounds read in coders/psd.c:1435
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