CVE-2016-2110

The NTLMSSP authentication implementation 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 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSP_NEGOTIATE_SEAL or NTLMSSP_NEGOTIATE_SIGN option to disrupt LDAP security.

Score

CVSS 3.0 5.9 Medium

Status

Modified - secalert@redhat.com

Published

2016-04-25

Last modified

2024-08-05

Weaknesses

CWE-254

Affected products

• Ubuntu Linux (Canonical)
• Samba (Samba)

References

• http://badlock.org/
• 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/msg00046.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
• http://lists.opensuse.org/opensuse-updates/2016-05/msg00124.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-2016-0621.html
• http://rhn.redhat.com/errata/RHSA-2016-0623.html
• http://rhn.redhat.com/errata/RHSA-2016-0624.html
• http://rhn.redhat.com/errata/RHSA-2016-0625.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