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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-06 21:54:31 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-14 19:55:02 +0100 |
| commit | cb90e1c4d03414b9abc765ab0b91d87a9278fb73 (patch) | |
| tree | 260e00b0678c4a59af3b584635cfb8fa5c3bef6b | |
| parent | 505d6ed4756a68707c26e416646228d5ed31c0f5 (diff) | |
avformat/mov: sanity check STSD entries
The choosen value is arbitrary. I am not sure if this is a good idea
but i dont immedeately see an alternative better way, it seems either
an arbitrary limit or OOM
Fixes: OOM
Fixes: 27492/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6194970578649088
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mov.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mov.c b/libavformat/mov.c index 2fd1f2cd8f..9ca0a3ee15 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2605,7 +2605,7 @@ static int mov_read_stsd(MOVContext *c, AVIOContext *pb, MOVAtom atom) entries = avio_rb32(pb); /* Each entry contains a size (4 bytes) and format (4 bytes). */ - if (entries <= 0 || entries > atom.size / 8) { + if (entries <= 0 || entries > atom.size / 8 || entries > 1024) { av_log(c->fc, AV_LOG_ERROR, "invalid STSD entries %d\n", entries); return AVERROR_INVALIDDATA; } |