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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-12 23:45:38 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-29 21:36:46 +0300 |
| commit | 06e5c791949b63555aa4305df6ce9d2ffa45ec90 (patch) | |
| tree | 4ba784df23572a6949ffccdbb16faa14b1422aad /libavformat/asfdec_o.c | |
| parent | 8af299acde9601e64740b75430960503615873b4 (diff) | |
avformat/asfdec_o: Check lang_idx
Fixes: index 26981 out of bounds for type 'ASFStreamData [128]'
Fixes: 27334/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_O_fuzzer-6197611002068992
Alternatively the array could be increased in size or the cases not fitting be ignored
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat/asfdec_o.c')
| -rw-r--r-- | libavformat/asfdec_o.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/asfdec_o.c b/libavformat/asfdec_o.c index 3729adee2f..c1d90360b4 100644 --- a/libavformat/asfdec_o.c +++ b/libavformat/asfdec_o.c @@ -854,6 +854,8 @@ static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTab st_num = avio_rl16(pb); st_num &= ASF_STREAM_NUM; lang_idx = avio_rl16(pb); // Stream Language ID Index + if (lang_idx >= ASF_MAX_STREAMS) + return AVERROR_INVALIDDATA; for (i = 0; i < asf->nb_streams; i++) { if (st_num == asf->asf_st[i]->stream_index) { st = s->streams[asf->asf_st[i]->index]; |