jasper: NULL pointer dereference in jp2_cdef_destroy (jp2_cod.c)

Description:
jasper is an open-source initiative to provide a free software-based reference implementation of the codec specified in the JPEG-2000 Part-1 standard.

Another round of fuzzing shows that a crafted image causes a NULL pointer access.

The complete ASan output:

# imginfo -f $FILE
cannot parse box data
ASAN:DEADLYSIGNAL
=================================================================
==6697==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000041da35 bp 0xbebebebebebebeae sp 0x7fff60ad6480 T0)
    #0 0x41da34 in atomic_compare_exchange_strong /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_atomic_clang.h:81
    #1 0x41da34 in __asan::Allocator::AtomicallySetQuarantineFlagIfAllocated(__asan::AsanChunk*, void*, __sanitizer::BufferedStackTrace*) /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_allocator.cc:468
    #2 0x41da34 in __asan::Allocator::Deallocate(void*, unsigned long, __sanitizer::BufferedStackTrace*, __asan::AllocType) /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_allocator.cc:522
    #3 0x41da34 in __asan::asan_free(void*, __sanitizer::BufferedStackTrace*, __asan::AllocType) /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_allocator.cc:725
    #4 0x4d271c in free /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:50
    #5 0x7f86ef11c995 in jp2_cdef_destroy /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_cod.c:230:3
    #6 0x7f86ef11e18e in jp2_box_destroy /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_cod.c:212:3
    #7 0x7f86ef11e18e in jp2_box_get /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_cod.c:319
    #8 0x7f86ef1219f6 in jp2_decode /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_dec.c:159:16
    #9 0x7f86ef0e4214 in jas_image_decode /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/base/jas_image.c:444:16
    #10 0x50a3be in main /tmp/portage/media-libs/jasper-2.0.10/work/jasper-2.0.10/src/appl/imginfo.c:238:16
    #11 0x7f86ee1c478f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-r3/work/glibc-2.23/csu/../csu/libc-start.c:289
    #12 0x419cd8 in _start (/usr/bin/imginfo+0x419cd8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /tmp/portage/sys-devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-rt/lib/asan/../sanitizer_common/sanitizer_atomic_clang.h:81 in atomic_compare_exchange_strong
==6697==ABORTING

Affected version:
2.0.10

Fixed version:
2.0.13 (not released atm)

Commit fix:
https://github.com/mdadams/jasper/commit/e96fc4fdd525fa0ede28074a7e2b1caf94b58b0d

Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.

CVE:
CVE-2017-6850

Reproducer:
https://github.com/asarubbo/poc/blob/master/00124-jasper-nullptr-jp2_cdef_destroy

Timeline:
2017-01-18: bug discovered and reported upstream
2017-01-25: blog post about the issue
2017-03-04: upstream released a patch
2017-03-12: CVE assigned

Note:
This bug was found with American Fuzzy Lop.

Permalink:

jasper: NULL pointer dereference in jp2_cdef_destroy (jp2_cod.c)

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