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Date: Sun, 20 Nov 2016 15:23:26 +0100
From: Agostino Sarubbo <ago@...too.org>
To: oss-security@...ts.openwall.com
Cc: cve-assign@...re.org
Subject: jasper: stack-based buffer overflow in jpc_tsfb_getbands2 (jpc_tsfb.c)
If suitable for a CVE please assign one. Thanks.
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.
A crafted image, through an intensive fuzz on the 1.900.22 version revealed a
stack overflow.
The complete ASan output:
# imginfo -f $FILE
warning: trailing garbage in marker segment (9 bytes)
warning: trailing garbage in marker segment (28 bytes)
warning: trailing garbage in marker segment (40 bytes)
warning: ignoring unknown marker segment (0xffee)
type = 0xffee (UNKNOWN); len = 23;1f 32 ff ff ff 00 10 00 3d 4d 00 01 32 ff 00
e4 00 10 00 00 4f warning: trailing garbage in marker segment (14 bytes)
=================================================================
==9166==ERROR: AddressSanitizer: stack-buffer-overflow on address
0x7faf2e200c20 at pc 0x7faf320a985a bp 0x7ffd397b9b10 sp 0x7ffd397b9b08
WRITE of size 4 at 0x7faf2e200c20 thread T0
#0 0x7faf320a9859 in jpc_tsfb_getbands2 /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_tsfb.c:227:16
#1 0x7faf320a9009 in jpc_tsfb_getbands2 /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_tsfb.c:223:3
#2 0x7faf320a8b9f in jpc_tsfb_getbands /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_tsfb.c:187:3
#3 0x7faf3200eaa6 in jpc_dec_tileinit /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_dec.c:714:4
#4 0x7faf3200eaa6 in jpc_dec_process_sod /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_dec.c:560
#5 0x7faf3201c1c3 in jpc_dec_decode /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_dec.c:391:10
#6 0x7faf3201c1c3 in jpc_decode /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_dec.c:255
#7 0x7faf31f7e684 in jas_image_decode /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/base/jas_image.c:406:16
#8 0x509c9a in main /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/appl/imginfo.c:203:16
#9 0x7faf3108761f in __libc_start_main /var/tmp/portage/sys-
libs/glibc-2.22-r4/work/glibc-2.22/csu/libc-start.c:289
#10 0x419988 in _init (/usr/bin/imginfo+0x419988)
Address 0x7faf2e200c20 is located in stack of thread T0 at offset 3104 in
frame
#0 0x7faf3200dbbf in jpc_dec_process_sod /tmp/portage/media-
libs/jasper-1.900.22/work/jasper-1.900.22/src/libjasper/jpc/jpc_dec.c:544
This frame has 1 object(s):
[32, 3104) 'bnds.i' 0x0ff665c38180: 00 00 00 00[f3]f3 f3 f3 f3 f3 f3 f3 f3
f3 f3 f3
0x0ff665c38190: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x0ff665c381a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0ff665c381b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0ff665c381c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0ff665c381d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
==9166==ABORTING
Affected version:
1.900.22
Fixed version:
1.900.30
Commit fix:
https://github.com/mdadams/jasper/commit/1abc2e5a401a4bf1d5ca4df91358ce5df111f495
Credit:
This bug was discovered by Agostino Sarubbo of Gentoo.
CVE:
N/A
Reproducer:
https://github.com/asarubbo/poc/blob/master/00047-jasper-stackoverflow-jpc_tsfb_getbands2
Timeline:
2016-11-09: bug discovered and reported to upstream
2016-11-20: upstream released a patch
2016-11-20: blog post about the issue
Note:
This bug was found with American Fuzzy Lop.
Permalink:
https://blogs.gentoo.org/ago/2016/11/20/jasper-stack-based-buffer-overflow-in-jpc_tsfb_getbands2-jpc_tsfb-c
--
Agostino Sarubbo
Gentoo Linux Developer
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