systemd Security Flaw Can Allow Remote Code Execution Attacks
33This systemd security flaw, which was accidentally introduced in 2015, creates a DNS security flaw on affected systems. It works by allowing an attacker to perform a buffer overflow attack against an affected Linux system, which in turn would either crash the machine, or allow the attacker to perform a remote code execution attack. The referenced article indicates that the flaw is present on Ubuntu 16.10 and Ubuntu 17.04, but it would also be present on other Linux distros that use the affected versions of systemd. If you're a Linux administrator, you need to get these affected systems patched as soon as possible. Linux security after all, is very important.
Link to article:
http://www.theregister.co.uk/2017/06/29/systemd_pwned_by_dns_query/