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Date: Wed, 25 Jan 2017 10:41:17 +0100
From: Salvatore Bonaccorso <carnil@...ian.org>
To: oss-security@...ts.openwall.com
Subject: Re: jasper: heap-based buffer overflow in
 jpc_dec_decodepkt (jpc_t2dec.c)

On Wed, Jan 25, 2017 at 10:16:01AM +0100, Agostino Sarubbo wrote:
> 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 read overflow.
> 
> The complete ASan output:
> 
> # imginfo -f $FILE
> warning: ignoring unknown marker segment (0xff70)
> type = 0xff70 (UNKNOWN); len = 35;00 01 43 72 65 61 74 6f 74 3a 30 4a 61 73 50 
> 65 72 00 01 00 00 73 69 6f 6e 20 31 2e 39 30 30 2e 39 warning: trailing 
> garbage in marker segment (3 bytes)
> warning: trailing garbage in marker segment (8 bytes)
> warning: trailing garbage in marker segment (6 bytes)
> =================================================================
> ==30315==ERROR: AddressSanitizer: heap-buffer-overflow on address 
> 0x61a00001f808 at pc 0x7fb7b2667e54 bp 0x7ffd0a9ab890 sp 0x7ffd0a9ab888
> READ of size 8 at 0x61a00001f808 thread T0
>     #0 0x7fb7b2667e53 in jpc_dec_decodepkt /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_t2dec.c:245:14
>     #1 0x7fb7b2667e53 in jpc_dec_decodepkts /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_t2dec.c:454
>     #2 0x7fb7b25ccd37 in jpc_dec_process_sod /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:628:6
>     #3 0x7fb7b25d6853 in jpc_dec_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:425:10
>     #4 0x7fb7b25d6853 in jpc_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:262
>     #5 0x7fb7b25a6231 in jp2_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_dec.c:218:21
>     #6 0x7fb7b2568214 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
>     #7 0x50a3be in main /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/appl/imginfo.c:238:16
>     #8 0x7fb7b164878f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-
> r3/work/glibc-2.23/csu/../csu/libc-start.c:289
>     #9 0x419cd8 in _start (/usr/bin/imginfo+0x419cd8)
> 
> 0x61a00001f808 is located 48 bytes to the right of 1368-byte region 
> [0x61a00001f280,0x61a00001f7d8)
> allocated by thread T0 here:
>     #0 0x4d2a98 in malloc /tmp/portage/sys-
> devel/llvm-3.9.1/work/llvm-3.9.1.src/projects/compiler-
> rt/lib/asan/asan_malloc_linux.cc:64
>     #1 0x7fb7b2575160 in jas_malloc /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/base/jas_malloc.c:242:11
>     #2 0x7fb7b2575160 in jas_alloc2 /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/base/jas_malloc.c:275
>     #3 0x7fb7b25ca2bf in jpc_dec_tileinit /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:841:24
>     #4 0x7fb7b25ca2bf in jpc_dec_process_sod /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:594
>     #5 0x7fb7b25d6853 in jpc_dec_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:425:10
>     #6 0x7fb7b25d6853 in jpc_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:262
>     #7 0x7fb7b25a6231 in jp2_decode /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jp2/jp2_dec.c:218:21
>     #8 0x7fb7b2568214 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
>     #9 0x50a3be in main /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/appl/imginfo.c:238:16
>     #10 0x7fb7b164878f in __libc_start_main /tmp/portage/sys-libs/glibc-2.23-
> r3/work/glibc-2.23/csu/../csu/libc-start.c:289
> 
> SUMMARY: AddressSanitizer: heap-buffer-overflow /tmp/portage/media-
> libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_t2dec.c:245:14 in 
> jpc_dec_decodepkt
> Shadow bytes around the buggy address:
>   0x0c347fffbeb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c347fffbec0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c347fffbed0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c347fffbee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>   0x0c347fffbef0: 00 00 00 00 00 00 00 00 00 00 00 fa fa fa fa fa
> =>0x0c347fffbf00: fa[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c347fffbf10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c347fffbf20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c347fffbf30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c347fffbf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
>   0x0c347fffbf50: 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
>   Container overflow:      fc
>   Array cookie:            ac
>   Intra object redzone:    bb
>   ASan internal:           fe
>   Left alloca redzone:     ca
>   Right alloca redzone:    cb
> ==30315==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/00126-jasper-heapoverflow-jpc_dec_decodepkt
> 
> Timeline:
> 2017-01-25: 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-heap-based-buffer-overflow-in-jpc_dec_decodepkt-jpc_t2dec-c

This one should be https://github.com/mdadams/jasper/issues/114

Regards,
Salvatore

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