In FFmpeg 3.2 and 4.0.1, an improper argument (AVCodecParameters) passed to the avpriv_request_sample function in the handle_eac3 function in libavformat/movenc.c may trigger an out-of-array read while converting a crafted AVI file to MPEG4, leading to a denial of service and possibly an information disclosure.
https://www.debian.org/security/2018/dsa-4249
https://github.com/FFmpeg/FFmpeg/commit/e6d3fd942f772f54ab6a5ca619cdaadef26b7702
https://github.com/FFmpeg/FFmpeg/commit/95556e27e2c1d56d9e18f5db34d6f756f3011148