CVE-2016-2110

MEDIUM

Description

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.

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

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

https://www.samba.org/samba/latest_news.html#4.4.2

https://www.samba.org/samba/security/CVE-2016-2110.html

Details

Source: MITRE

Published: 2016-04-25

Updated: 2016-12-31

Type: CWE-254

Risk Information

CVSS v2.0

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

CVSS v3.0

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