Several vulnerabilities were discovered in coturn, a TURN and STUN server for VoIP. CVE-2020-4067 Felix Doerre reported that the STUN response buffer was not properly initialised, which could allow an attacker to leak bytes in the padding bytes from the connection of another client. CVE-2020-6061 Aleksandar Nikolic reported that a crafted HTTP POST request can lead to information leaks and other misbehavior. CVE-2020-6062 Aleksandar Nikolic reported that a crafted HTTP POST request can lead to server crash and denial of service.