Reference: http://seclists.org/oss-sec/2016/q4/3
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Hi,
imagemagick identify suffers of a use after free issue, which I reported
and has been patched, you can find a reproducer in the github bug tracker
issue link
issue: *https://github.com/ImageMagick/ImageMagick/issues/281
<https://github.com/ImageMagick/ImageMagick/issues/281>*
patch:
*https://github.com/ImageMagick/ImageMagick/commit/d63a3c5729df59f183e9e110d5d8385d17caaad0
<https://github.com/ImageMagick/ImageMagick/commit/d63a3c5729df59f183e9e110d5d8385d17caaad0>*
Thanks,
Marco Grassi (@marcograss) of Tencent's Keen Lab
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==5303==ERROR: AddressSanitizer: heap-use-after-free on address
0x60600003c628 at pc 0x0000016cfeba bp 0x7ffeb3910f50 sp 0x7ffeb3910f48
READ of size 4 at 0x60600003c628 thread T0
#0 0x16cfeb9 in SetImageDepth
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/attribute.c:1040:43
#1 0x16383cf in WriteTIFFImage
/home/bob/VulnResearch/misc/ImageMagick/coders/tiff.c:3212:16
#2 0x18bfcfc in WriteImage
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/constitute.c:1100:14
#3 0x18c2594 in WriteImages
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/constitute.c:1319:13
#4 0x2ff1c7f in MogrifyImageCommand
/home/bob/VulnResearch/misc/ImageMagick/MagickWand/mogrify.c:3974:17
#5 0x2f8cead in MagickCommandGenesis
/home/bob/VulnResearch/misc/ImageMagick/MagickWand/mogrify.c:183:14
#6 0x4f5da9 in MagickMain
/home/bob/VulnResearch/misc/ImageMagick/utilities/magick.c:145:10
#7 0x4f5da9 in main
/home/bob/VulnResearch/misc/ImageMagick/utilities/magick.c:176
#8 0x7fc9edea082f in __libc_start_main
/build/glibc-GKVZIf/glibc-2.23/csu/../csu/libc-start.c:291
#9 0x422428 in _start
(/home/bob/VulnResearch/misc/ImageMagick/utilities/magick+0x422428)
0x60600003c628 is located 8 bytes inside of 56-byte region
[0x60600003c620,0x60600003c658)
freed by thread T0 here:
#0 0x4c23d0 in __interceptor_cfree.localalias.0
(/home/bob/VulnResearch/misc/ImageMagick/utilities/magick+0x4c23d0)
#1 0x5ac708 in RelinquishMagickMemory
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/memory.c:1002:3
previously allocated by thread T0 here:
#0 0x4c2558 in __interceptor_malloc
(/home/bob/VulnResearch/misc/ImageMagick/utilities/magick+0x4c2558)
#1 0x55c149 in NewLinkedList
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/linked-list.c:717:32
SUMMARY: AddressSanitizer: heap-use-after-free
/home/bob/VulnResearch/misc/ImageMagick/MagickCore/attribute.c:1040:43 in
SetImageDepth
Shadow bytes around the buggy address:
0x0c0c7ffff870: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0c7ffff880: fd fd fd fa fa fa fa fa fd fd fd fd fd fd fd fa
0x0c0c7ffff890: fa fa fa fa fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0c7ffff8a0: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0c7ffff8b0: fd fd fd fa fa fa fa fa 00 00 00 00 00 00 00 00
=>0x0c0c7ffff8c0: fa fa fa fa fd[fd]fd fd fd fd fd fa fa fa fa fa
0x0c0c7ffff8d0: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0c7ffff8e0: fd fd fd fa fa fa fa fa fd fd fd fd fd fd fd fa
0x0c0c7ffff8f0: fa fa fa fa fd fd fd fd fd fd fd fa fa fa fa fa
0x0c0c7ffff900: fd fd fd fd fd fd fd fa fa fa fa fa fd fd fd fd
0x0c0c7ffff910: fd fd fd fa fa fa fa fa fd fd fd fd fd fd fd 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
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==5303==ABORTING
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