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Date: Wed, 25 Jan 2017 10:12:23 +0100
From: Agostino Sarubbo <ago@...too.org>
To: oss-security@...ts.openwall.com
Subject: jasper: invalid memory read in jas_matrix_bindsub (jas_seq.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 an invalid memory 
read.

The complete ASan output:

# imginfo -f $FILE
warning: ignoring unknown marker segment (0xff59)
type = 0xff59 (UNKNOWN); len = 20;00 40 40 00 00 00 00 69 00 00 00 00 00 00 00 
00 00 00 warning: ignoring unknown marker segment (0xff46)
type = 0xff46 (UNKNOWN); len = 20;01 40 40 00 00 00 00 00 00 00 00 00 00 00 12 
00 94 7f ASAN:DEADLYSIGNAL
=================================================================
==22653==ERROR: AddressSanitizer: SEGV on unknown address 0x60180000ec30 (pc 
0x7f410df421b7 bp 0x7ffdc80abaf0 sp 0x7ffdc80aba60 T0)
==22653==The signal is caused by a READ memory access.
    #0 0x7f410df421b6 in jas_matrix_bindsub /tmp/portage/media-
libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/base/jas_seq.c:254:18
    #1 0x7f410df951a1 in jpc_dec_tileinit /tmp/portage/media-
libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:835:5
    #2 0x7f410df951a1 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
    #3 0x7f410dfa1853 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 0x7f410dfa1853 in jpc_decode /tmp/portage/media-
libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/jpc/jpc_dec.c:262
    #5 0x7f410df71231 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 0x7f410df33214 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 0x7f410d01378f 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)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /tmp/portage/media-
libs/jasper-2.0.10/work/jasper-2.0.10/src/libjasper/base/jas_seq.c:254:18 in 
jas_matrix_bindsub
==22653==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/00125-jasper-invalidread-jas_matrix_bindsub

Timeline:
2017-01-21: 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-invalid-memory-read-in-jas_matrix_bindsub-jas_seq-c

-- 
Agostino Sarubbo
Gentoo Linux Developer

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