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Date: Mon, 28 Aug 2017 13:56:04 +0000
From: "Agostino Sarubbo" <ago@...too.org>
To: "oss-security@...ts.openwall.com" <oss-security@...ts.openwall.com>
Subject: openjpeg: heap-based buffer overflow in opj_t2_encode_packet (t2.c)

Description:
openjpeg is an open-source JPEG 2000 library.

The complete ASan output of the issue:

# opj_compress -r 20,10,1 -jpip -EPH -SOP -cinema2K 24 -n 1 -i $FILE -o null.j2k
TIFFReadDirectoryCheckOrder: Warning, Invalid TIFF directory; tags are not sorted in ascending order.
TIFFReadDirectory: Warning, Unknown field with tag 27154 (0x6a12) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 32512 (0x7f00) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 15163 (0x3b3b) encountered.
TIFFReadDirectory: Warning, Unknown field with tag 15318 (0x3bd6) encountered.
TIFFFetchNormalTag: Warning, Incorrect count for "FillOrder"; tag ignored.
TIFFReadDirectory: Warning, TIFF directory is missing required "StripByteCounts" field, calculating from imagelength.
=================================================================
==114390==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6080000000f4 at pc 0x7f05a3983aa9 bp 0x7ffd1be5ba40 sp 0x7ffd1be5ba38
WRITE of size 1 at 0x6080000000f4 thread T0
    #0 0x7f05a3983aa8 in opj_t2_encode_packet /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/t2.c:632:14
    #1 0x7f05a3980801 in opj_t2_encode_packets /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/t2.c:316:23
    #2 0x7f05a399619b in opj_tcd_t2_encode /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/tcd.c:2217:11
    #3 0x7f05a399619b in opj_tcd_encode_tile /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/tcd.c:1390
    #4 0x7f05a38b5e2b in opj_j2k_write_sod /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:4661:11
    #5 0x7f05a38b5e2b in opj_j2k_write_all_tile_parts /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:11586
    #6 0x7f05a38b5e2b in opj_j2k_post_write_tile /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:11287
    #7 0x7f05a38b445d in opj_j2k_encode /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:11028:15
    #8 0x7f05a38ff2f8 in opj_encode /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/openjpeg.c:775:20
    #9 0x50b942 in main /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/bin/jp2/opj_compress.c:1993:36
    #10 0x7f05a2296680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289
    #11 0x41bc18 in _start (/usr/bin/opj_compress+0x41bc18)

0x6080000000f4 is located 0 bytes to the right of 84-byte region [0x6080000000a0,0x6080000000f4)
allocated by thread T0 here:
    #0 0x4d15c8 in malloc /var/tmp/portage/sys-libs/compiler-rt-sanitizers-4.0.1/work/compiler-rt-4.0.1.src/lib/asan/asan_malloc_linux.cc:66
    #1 0x7f05a39aae29 in opj_malloc /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/opj_malloc.c:196:12
    #2 0x7f05a38e1760 in opj_j2k_update_rates /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:5157:22
    #3 0x7f05a38b837f in opj_j2k_exec /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:7954:33
    #4 0x7f05a38b837f in opj_j2k_start_compress /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/j2k.c:11103
    #5 0x7f05a38ff19c in opj_start_compress /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/openjpeg.c:758:20
    #6 0x50b90f in main /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/bin/jp2/opj_compress.c:1970:20
    #7 0x7f05a2296680 in __libc_start_main /var/tmp/portage/sys-libs/glibc-2.23-r4/work/glibc-2.23/csu/../csu/libc-start.c:289

SUMMARY: AddressSanitizer: heap-buffer-overflow /var/tmp/portage/media-libs/openjpeg-9999/work/openjpeg-9999/src/lib/openjp2/t2.c:632:14 in opj_t2_encode_packet
Shadow bytes around the buggy address:
  0x0c107fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x0c107fff8000: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 fa
=>0x0c107fff8010: fa fa fa fa 00 00 00 00 00 00 00 00 00 00[04]fa
  0x0c107fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
  0x0c107fff8060: 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
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  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
==114390==ABORTING
CINEMA 2K profile activated
Other options specified could be overridden
WARNING:
Input image bitdepth is 4 bits
TIF conversion has automatically rescaled to 12-bits
to comply with cinema profiles.
[WARNING] JPEG 2000 Profile-3 and 4 (2k/4k dc profile) requires:
1 single quality layer-> Number of layers forced to 1 (rather than 3)
-> Rate of the last layer (1.0) will be used[INFO] tile number 1 / 1

Affected version:
Master at 2017-08-16 and maybe past releases

Fixed version:
N/A

Commit fix:
https://github.com/uclouvain/openjpeg/commit/c535531f03369623b9b833ef41952c62257b507e

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

CVE:
Waiting for a CVE assignment

Reproducer:
https://github.com/asarubbo/poc/blob/master/00322-openjpeg-heapoverflow-opj_t2_encode_packet

Timeline:
2017-08-16: bug discovered and reported to upstream
2017-08-28: blog post about the issue

Note:
This bug was found with American Fuzzy Lop.
This bug was identified with bare metal servers donated by Packet. This work is also supported by the Core Infrastructure Initiative.

Permalink:
https://blogs.gentoo.org/ago/2017/08/28/openjpeg-heap-based-buffer-overflow-in-opj_t2_encode_packet-t2-c/

--
Agostino Sarubbo
Gentoo Linux Developer


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