oss-security - ffmpeg afl bugs

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <trinity-791b10d9-ee4c-4418-ab3c-338e17152b44-1474834018724@3capp-gmx-bs68>
Date: Sun, 25 Sep 2016 22:06:58 +0200
From: cookieopfer@....net
To: oss-security@...ts.openwall.com
Subject: ffmpeg afl bugs

Hi,

couldn't build ffmpeg, because of
"register size specification" error.

tried to catch this overflow from afl
fuzzer:


$ ./ffmpeg -i /tmp/ffmpeg-h264-call-stack-overflow.mp4 19.mp3
ffmpeg version N-81723-g6d9a46e Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.4.5 (Debian 4.4.5-8)
  configuration: --disable-yasm
  libavutil      55. 30.100 / 55. 30.100
  libavcodec     57. 57.101 / 57. 57.101
  libavformat    57. 50.100 / 57. 50.100
  libavdevice    57.  0.102 / 57.  0.102
  libavfilter     6. 62.100 /  6. 62.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
bla
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xa256360] overread end of atom 'stsd' by 4294967134 bytes
bla
bla
bla
bla
bla
bla
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/ffmpeg-h264-call-stack-overflow.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 19529854
    compatible_brands: mp42isom
    creation_time   : 2014-11-14T07:34:24.000000Z
  Duration: 00:02:55.78, bitrate: 0 kb/s
    Stream #0:0(eng): Data: none ([0][16][0]1 / 0x31001000), 3 kb/s (default)
    Metadata:
      creation_time   : 2014-11-14T07:34:24.000000Z
      handler_name    : dia Handler
Output #0, mp3, to '19.mp3':
Output file #0 does not contain any stream









./libavformat/mov.c
$ grep -n bla ./libavformat/mov.c
4789:              printf("bla\n");


Have fun with ffmpeg-h264-call-stack-overflow.mp4

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.