diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2013-01-11 00:54:12 +0100 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2013-02-25 07:33:59 +0100 |
| commit | 11dcecfcca0eca1a571792c4fa3c21fb2cfddddc (patch) | |
| tree | 679e673fc84fbdf13b55441d92508c0e2d0dfee4 | |
| parent | 3d035d5a6a9116a334fc82dcb37704da2d074958 (diff) | |
| download | ffmpeg-11dcecfcca0eca1a571792c4fa3c21fb2cfddddc.tar.gz | |
vorbisdec: Error on bark_map_size equal to 0.
The value is used to calculate output LSP curve and a division by zero
and out of array accesses would occur.
CVE-2013-0894
CC: libav-stable@libav.org
Reported-by: Dale Curtis <dalecurtis@chromium.org>
Found-by: inferno@chromium.org
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
| -rw-r--r-- | libavcodec/vorbisdec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/vorbisdec.c b/libavcodec/vorbisdec.c index 158bd6f57c..600083bd59 100644 --- a/libavcodec/vorbisdec.c +++ b/libavcodec/vorbisdec.c @@ -586,6 +586,11 @@ static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) floor_setup->data.t0.order = get_bits(gb, 8); floor_setup->data.t0.rate = get_bits(gb, 16); floor_setup->data.t0.bark_map_size = get_bits(gb, 16); + if (floor_setup->data.t0.bark_map_size == 0) { + av_log(vc->avccontext, AV_LOG_ERROR, + "Floor 0 bark map size is 0.\n"); + return AVERROR_INVALIDDATA; + } floor_setup->data.t0.amplitude_bits = get_bits(gb, 6); /* zero would result in a div by zero later * * 2^0 - 1 == 0 */ |