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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-25 01:15:30 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-28 01:43:31 +0200 |
| commit | 0ca5c57d9d0670097235102abd54cccfb3f3c2db (patch) | |
| tree | 5729b54f2db770a9fe27495387bed9349d60817a | |
| parent | 2ac9bc34978cf77eebaf288741bdfa669e1df195 (diff) | |
| download | ffmpeg-0ca5c57d9d0670097235102abd54cccfb3f3c2db.tar.gz | |
avformat/mvdec: Fix DoS due to lack of eof check
Fixes: loop.mv
Found-by: Xiaohei and Wangchu from Alibaba Security Team
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 4f05e2e2dc1a89f38cd9f0960a6561083d714f1e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mvdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c index 186b581f89..609095286d 100644 --- a/libavformat/mvdec.c +++ b/libavformat/mvdec.c @@ -327,6 +327,8 @@ static int mv_read_header(AVFormatContext *avctx) uint32_t pos = avio_rb32(pb); uint32_t asize = avio_rb32(pb); uint32_t vsize = avio_rb32(pb); + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; avio_skip(pb, 8); av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME); av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME); |