Description:
graphicsmagick is a collection of tools and libraries for many image formats.
The complete ASan output of the issue:
# gm convert -clip -negate $FILE out ==18510==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000015f4 at pc 0x7f6e936c556b bp 0x7fff17c33ab0 sp 0x7fff17c33aa8 READ of size 4 at 0x6020000015f4 thread T0 #0 0x7f6e936c556a in ReadSUNImage /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/coders/sun.c:581:26 #1 0x7f6e98fa8e88 in ReadImage /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/constitute.c:1607:13 #2 0x7f6e98e3bf18 in ConvertImageCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:4348:22 #3 0x7f6e98e780c5 in MagickCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:8869:17 #4 0x7f6e98f2385b in GMCommandSingle /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:17396:10 #5 0x7f6e98f20991 in GMCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:17449:16 #6 0x7f6e9778b680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289 #7 0x419cd8 in _init (/usr/bin/gm+0x419cd8) 0x6020000015f4 is located 0 bytes to the right of 4-byte region [0x6020000015f0,0x6020000015f4) allocated by thread T0 here: #0 0x4cf688 in malloc /var/tmp/portage/sys-libs/compiler-rt-sanitizers-4.0.1/work/compiler-rt-4.0.1.src/lib/asan/asan_malloc_linux.cc:66 #1 0x7f6e9938a4d6 in MagickMalloc /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/memory.c:156:10 #2 0x7f6e98db2590 in AllocateImageColormap /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/colormap.c:76:21 #3 0x7f6e936b0f87 in ReadSUNImage /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/coders/sun.c:428:14 #4 0x7f6e98fa8e88 in ReadImage /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/constitute.c:1607:13 #5 0x7f6e98e3bf18 in ConvertImageCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:4348:22 #6 0x7f6e98e780c5 in MagickCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:8869:17 #7 0x7f6e98f2385b in GMCommandSingle /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:17396:10 #8 0x7f6e98f20991 in GMCommand /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/magick/command.c:17449:16 #9 0x7f6e9778b680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289 SUMMARY: AddressSanitizer: heap-buffer-overflow /var/tmp/portage/media-gfx/graphicsmagick-1.3.26/work/GraphicsMagick-1.3.26/coders/sun.c:581:26 in ReadSUNImage Shadow bytes around the buggy address: 0x0c047fff8260: fa fa 04 fa fa fa 00 00 fa fa 00 00 fa fa fd fd 0x0c047fff8270: fa fa fd fd fa fa 07 fa fa fa fd fd fa fa 00 01 0x0c047fff8280: fa fa 00 00 fa fa fd fa fa fa fd fa fa fa 02 fa 0x0c047fff8290: fa fa 02 fa fa fa 00 fa fa fa 06 fa fa fa 00 fa 0x0c047fff82a0: fa fa 00 07 fa fa 04 fa fa fa 04 fa fa fa fd fa =>0x0c047fff82b0: fa fa 00 00 fa fa 00 00 fa fa 04 fa fa fa[04]fa 0x0c047fff82c0: fa fa fd fa fa fa 00 00 fa fa fa fa fa fa fa fa 0x0c047fff82d0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff82e0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff82f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c047fff8300: 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 Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 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 ==18510==ABORTING
Affected version:
1.3.26
Fixed version:
N/A
Commit fix:
http://hg.code.sf.net/p/graphicsmagick/code/rev/95d00d55e978
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
CVE-2017-12937
Reproducer:
https://github.com/asarubbo/poc/blob/master/00304-graphicsmagick-heapoverflow-ReadSUNImage
Timeline:
2017-07-17: bug discovered and reported to upstream
2017-07-31: upstream released a fix
2017-08-05: blog post about the issue
2017-08-18: CVE assigned
Note:
This bug was found with American Fuzzy Lop.
This bug was identified with bare metal servers donated by Packet. This work is also supported by the Core Infrastructure Initiative.
Permalink:
graphicsmagick: heap-based buffer overflow in ReadSUNImage (sun.c)