In FFmpeg 4.0.1, improper handling of frame types (other than EAC3_FRAME_TYPE_INDEPENDENT) that have multiple independent substreams in the handle_eac3 function in libavformat/movenc.c may trigger an out-of-array access while converting a crafted AVI file to MPEG4, leading to a denial of service or possibly unspecified other impact.
https://www.debian.org/security/2018/dsa-4249
https://github.com/FFmpeg/FFmpeg/commit/ed22dc22216f74c75ee7901f82649e1ff725ba50