Samba 3.x before 3.6.23, 4.0.x before 4.0.16, and 4.1.x before 4.1.6 does not enforce the password-guessing protection mechanism for all interfaces, which makes it easier for remote attackers to obtain access via brute-force ChangePasswordUser2 (1) SAMR or (2) RAP attempts.
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05115993
https://bugzilla.samba.org/show_bug.cgi?id=10245
http://www.ubuntu.com/usn/USN-2156-1
http://www.securityfocus.com/bid/66336
http://www.samba.org/samba/security/CVE-2013-4496
http://www.samba.org/samba/history/samba-4.1.6.html
http://www.samba.org/samba/history/samba-4.0.16.html
http://www.samba.org/samba/history/samba-3.6.23.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:082
http://security.gentoo.org/glsa/glsa-201502-15.xml
http://rhn.redhat.com/errata/RHSA-2014-0330.html
http://lists.opensuse.org/opensuse-updates/2014-03/msg00063.html
http://lists.opensuse.org/opensuse-updates/2014-03/msg00062.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-June/134717.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html