Unauthenticated service interruption via unchecked Telnet response buffering

Buffer overflow in the Contiki 3.0 Telnet service allows remote attackers to interrupt the service by listing many long file names. Telnet command handling stores all ls output in a fixed-length response buffer without checking whether each write succeeds, so output is lost after the buffer fills. Exploitation requires a directory populated with many long-named files; an ls request then leaves the Telnet server unable to respond, without reported data disclosure or modification.