The bundled LDAP client library in Samba 3.x and 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 "client ldap sasl wrapping" setting, which allows man-in-the-middle attackers to perform LDAP protocol-downgrade attacks by modifying the client-server data stream.
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
http://rhn.redhat.com/errata/RHSA-2016-0611.html
http://rhn.redhat.com/errata/RHSA-2016-0612.html
http://rhn.redhat.com/errata/RHSA-2016-0613.html
http://rhn.redhat.com/errata/RHSA-2016-0614.html
http://rhn.redhat.com/errata/RHSA-2016-0618.html
http://rhn.redhat.com/errata/RHSA-2016-0619.html
http://rhn.redhat.com/errata/RHSA-2016-0620.html
http://rhn.redhat.com/errata/RHSA-2016-0624.html
http://www.debian.org/security/2016/dsa-3548
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securitytracker.com/id/1035533
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012
http://www.ubuntu.com/usn/USN-2950-1
http://www.ubuntu.com/usn/USN-2950-2
http://www.ubuntu.com/usn/USN-2950-3
http://www.ubuntu.com/usn/USN-2950-4
http://www.ubuntu.com/usn/USN-2950-5
https://bto.bluecoat.com/security-advisory/sa122
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399
https://security.gentoo.org/glsa/201612-47
https://www.samba.org/samba/history/samba-4.2.10.html
Source: MITRE
Published: 2016-04-25
Updated: 2016-12-31
Type: CWE-254
Base Score: 4.3
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Impact Score: 2.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Impact Score: 3.6
Exploitability Score: 2.2
Severity: MEDIUM