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Date: Wed, 25 Jan 2017 10:10:35 +0100
From: Agostino Sarubbo <ago@...too.org>
To: oss-security@...ts.openwall.com
Subject: 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:
N/A

Commit fix:
N/A

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

CVE:
N/A

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

Note:
This bug was found with American Fuzzy Lop.

Permalink:
https://blogs.gentoo.org/ago/2017/01/25/jasper-null-pointer-dereference-in-jp2_cdef_destroy-jp2_cod-c

-- 
Agostino Sarubbo
Gentoo Linux Developer

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