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Date: Wed, 25 Jan 2017 10:16:01 +0100
From: Agostino Sarubbo <ago@...too.org>
To: oss-security@...ts.openwall.com
Subject: jasper: heap-based buffer overflow in jpc_dec_decodepkt (jpc_t2dec.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 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
--
Agostino Sarubbo
Gentoo Linux Developer
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