CVE-2017-14054: Excessive Iteration

In libavformat/rmdec.c in FFmpeg 3.3.3, a DoS in ivrreadheader due to lack of an EOF End of File check might cause huge CPU consumption. When a crafted IVR file, which claims a large "len" field in the header but does not contain sufficient backing data, is provided, the first type==4 loop would...