Red Hat Security Advisory 2016-0623-01 – Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Security Fix: Multiple flaws were found in Samba’s DCE/RPC protocol implementation. A remote, authenticated attacker could use these flaws to cause a denial of service against the Samba server or, possibly, execute arbitrary code with the permissions of the user running Samba. This flaw could also be used to downgrade a secure DCE/RPC connection by a man-in-the-middle attacker taking control of an Active Directory object and compromising the security of a Samba Active Directory Domain Controller.