CVE-2016-2119

libcli/smb/smbXclibase.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the 1 SMB2SESSIONFLAGISGUEST or 2 SMB2SESSIONFLAGISNULL flag...