The sdp_parse_fmtp_config_h264 function in libavformat/rtpdec_h264.c in FFmpeg before 3.3.4 mishandles empty sprop-parameter-sets values, which allows remote attackers to cause a denial of service (heap buffer overflow) or possibly have unspecified other impact via a crafted sdp file.
The dnxhd_decode_header function in libavcodec/dnxhddec.c in FFmpeg 3.0 through 3.3.2 allows remote attackers to cause a denial of service (out-of-array access) or possibly have unspecified other impact via a crafted DNxHD file.
The ff_amf_get_field_value function in libavformat/rtmppkt.c in FFmpeg 3.3.2 allows remote RTMP servers to cause a denial of service (Segmentation Violation and application crash) via a crafted stream.
Integer overflow in the ape_decode_frame function in libavcodec/apedec.c in FFmpeg 2.4 through 3.3.2 allows remote attackers to cause a denial of service (out-of-array access and application crash) or possibly have unspecified other impact via a crafted APE file.