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Samba Patched Against Important SMB2/3 Client Security Issue, Update Now

In layman’s terms, this means that an attacker can impersonate a server that users can connect to using Samba, an open-source re-implementation of the SMB/CIFS networking protocol, and then deliver malicious results. The issue affects components like winbindd, which uses DCE/RPC (Distributed Computing Environment / Remote Procedure Calls) over SMB2 when communicating with trusted domains as a domain controller, or with domain controllers as a member server.