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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-07-11 12:39:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-06 13:54:16 +0200 |
| commit | 6d72fc6be2bef83901364e85e01f5b3374b62ddf (patch) | |
| tree | e76311316d64d005311342d5f2af222aa0d614f0 | |
| parent | 796a84fd047099ba25329ee2c420d11709ebe8b1 (diff) | |
| download | ffmpeg-6d72fc6be2bef83901364e85e01f5b3374b62ddf.tar.gz | |
avformat/mxfdec: Check size for shrinking
av_shrink_packet() takes int size, so size must fit in int
Fixes: out of array access
Fixes: 35607/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-4875541323841536
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 65b862ab59c4bfaae98be596b84a072f52444398)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mxfdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index c18a25951c..0a6d937a0a 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -600,7 +600,7 @@ static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv return AVERROR_INVALIDDATA; // enc. code size = klv_decode_ber_length(pb); - if (size < 32 || size - 32 < orig_size) + if (size < 32 || size - 32 < orig_size || (int)orig_size != orig_size) return AVERROR_INVALIDDATA; avio_read(pb, ivec, 16); avio_read(pb, tmpbuf, 16); |