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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-12-13 00:08:46 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-17 21:34:53 +0200 |
| commit | f5ed37fd0b8d17d886312dfba7fac0cfdbda5864 (patch) | |
| tree | da8667598865415a2b04042f2f4bd78758bcb853 | |
| parent | 897c1c990ae97636ced67f29fe13faaa0f31223c (diff) | |
| download | ffmpeg-f5ed37fd0b8d17d886312dfba7fac0cfdbda5864.tar.gz | |
avformat/mov: Extend data_size check in mov_read_udta_string()
Fixes: signed integer overflow: -2147483634 - 16 cannot be represented in type 'int'
Fixes: 28322/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5711888402612224
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 74c4c539538e36d8df02de2484b045010d292f2c)
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 e6d4e360cd..04af735591 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -356,7 +356,7 @@ retry: if (c->itunes_metadata && atom.size > 8) { int data_size = avio_rb32(pb); int tag = avio_rl32(pb); - if (tag == MKTAG('d','a','t','a') && data_size <= atom.size) { + if (tag == MKTAG('d','a','t','a') && data_size <= atom.size && data_size >= 16) { data_type = avio_rb32(pb); // type avio_rb32(pb); // unknown str_size = data_size - 16; |