Change #286121

Comments

avformat/rtmppkt: Write the full basic header for continuation chunks
Continuation chunks were marked with the single byte 0xC0 | channel_id,
which is only valid for chunk stream ids below 64. Ids from 64 need the
2 or 3 byte form of the basic header, as used for the first chunk, so
the peer misparsed the rest of the stream. Repeat the basic header of
the first chunk with chunk type 3.

Corrupt chunk stream Replicated through UnModified FFmpeg
Found during triage of the security report BvkwW4Yd19HN

Changed files

• libavformat/rtmppkt.c