LScube Feng 0.1.15 and earlier allows remote attackers to cause a denial of service (NULL dereference and daemon crash) via (1) a malformed Transport header which triggers misparsing in parse_transport_header in RTSP_setup.c as demonstrated by a Transport header that contains only a \RTP/AVP;unicast;client_port\ sequence; or (2) a malformed Range header which triggers misparsing in parse_play_time_range in RTSP_Play as demonstrated by an empty Range header.