The SMB1 protocol implementation in Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not recognize the โserver signing = mandatoryโ setting, which allows man-in-the-middle attackers to spoof SMB servers by modifying the client-server data stream.
badlock.org/
lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
rhn.redhat.com/errata/RHSA-2016-0612.html
rhn.redhat.com/errata/RHSA-2016-0614.html
rhn.redhat.com/errata/RHSA-2016-0618.html
rhn.redhat.com/errata/RHSA-2016-0620.html
www.debian.org/security/2016/dsa-3548
www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securityfocus.com/bid/86011
www.securitytracker.com/id/1035533
www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012
www.ubuntu.com/usn/USN-2950-1
www.ubuntu.com/usn/USN-2950-2
www.ubuntu.com/usn/USN-2950-3
www.ubuntu.com/usn/USN-2950-4
www.ubuntu.com/usn/USN-2950-5
bto.bluecoat.com/security-advisory/sa122
security.gentoo.org/glsa/201612-47
www.samba.org/samba/history/samba-4.2.10.html
www.samba.org/samba/latest_news.html#4.4.2
www.samba.org/samba/security/CVE-2016-2114.html