In FFmpeg 2.4 and 3.3.3, the read_data function in libavformat/hls.c does not restrict reload attempts for an insufficient list, which allows remote attackers to cause a denial of service (infinite loop).
https://lists.debian.org/debian-lts-announce/2019/03/msg00041.html
https://github.com/FFmpeg/FFmpeg/commit/7ec414892ddcad88313848494b6fc5f437c9ca4a
https://github.com/FFmpeg/FFmpeg/commit/7ba100d3e6e8b1e5d5342feb960a7f081d6e15af