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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 16:14:03 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-10 12:28:29 +0100 |
| commit | 25f240fcb398eb499ca4b70c026a8bb9f2a32731 (patch) | |
| tree | 885b20df291c4fa6df1ec0bf51c36bf94e04afda | |
| parent | 7a239526146934a50c1cebd25e079a1027db545c (diff) | |
| download | ffmpeg-25f240fcb398eb499ca4b70c026a8bb9f2a32731.tar.gz | |
avformat/id3v2: Check the return from avio_get_str()
Fixes: out of array access
Fixes: 29446/clusterfuzz-testcase-minimized-ffmpeg_dem_AAC_fuzzer-5096222622875648
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/id3v2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c index 97f6cc8a68..df11b5450c 100644 --- a/libavformat/id3v2.c +++ b/libavformat/id3v2.c @@ -605,7 +605,10 @@ static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, /* mimetype */ if (isv34) { - taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype)); + int ret = avio_get_str(pb, taglen, mimetype, sizeof(mimetype)); + if (ret < 0 || ret >= taglen) + goto fail; + taglen -= ret; } else { if (avio_read(pb, mimetype, 3) < 0) goto fail; |