USN-6164-2 c-ares vulnerabilities

USN-6164-1 fixed several vulnerabilities in c-ares. This update provides the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. Original advisory details: Hannes Moesl discovered that c-ares incorrectly handled certain ipv6 addresses. An attacker could use this issue to cause c-ares ...