SUSE: 2018:3767-2 Important: Systemd Buffer Overflow And Escalation Fixes

This update for systemd fixes the following issues: Security issues fixed: - CVE-2018-15688: A buffer overflow vulnerability in the dhcp6 client of systemd allowed a malicious dhcp6 server to overwrite heap memory in systemd-networkd. (bsc#1113632) - CVE-2018-15686: A vulnerability in unit_deserialize of systemd allows an attacker to supply arbitrary state across systemd re-execution via NotifyAccess. This can be used to improperly influence systemd execution and possibly lead to root privilege escalation. (bsc#1113665) Non-security issues fixed: - dhcp6: split assert_return() to be more debuggable when hit - core: skip unit deserialization and move to the next one when unit_deserialize() fails - core: properly handle deserialization of unknown unit types (#6476)