CVE-2016-2110

MEDIUM

Samba 3.x-4.4.x - Man-in-the-Middle Protocol Downgrade via NTLMSSP Flag Manipulation

Title source: llm

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 (42)

Core 42

Core References

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0612.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-updates/2016-05/msg00124.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0613.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0621.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0624.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0618.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0614.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0620.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0611.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-2950-3

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html

Mailing List vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0619.html

Third Party Advisory vendor-advisory x_refsource_gentoo

https://security.gentoo.org/glsa/201612-47

Third Party Advisory vendor-advisory x_refsource_debian

http://www.debian.org/security/2016/dsa-3548

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0623.html

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-2950-2

Vendor Advisory vendor-advisory x_refsource_redhat

http://rhn.redhat.com/errata/RHSA-2016-0625.html

Vendor Advisory vendor-advisory x_refsource_slackware

http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-2950-1

Various Sources x_refsource_misc

http://badlock.org/

Vendor Advisory x_refsource_confirm

http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id/1035533

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-2950-5

Various Sources x_refsource_confirm

https://www.samba.org/samba/history/samba-4.2.10.html

Various Sources x_refsource_confirm

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

Various Sources x_refsource_confirm

https://bto.bluecoat.com/security-advisory/sa122

Patch, Vendor Advisory x_refsource_confirm

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

Vendor Advisory x_refsource_confirm

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964

Vendor Advisory x_refsource_confirm

https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821

Vendor Advisory x_refsource_confirm

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399

Vendor Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-2950-4

Scores

CVSS v3 5.9

EPSS 0.1775

EPSS Percentile 95.2%

Attack Vector NETWORK

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Details

CWE

CWE-254

Status published

Products (38)

canonical/ubuntu_linux 14.04

canonical/ubuntu_linux 15.10

canonical/ubuntu_linux 16.04

samba/samba 3.0.0

samba/samba 3.0.1

samba/samba 3.0.2 (2 CPE variants)

samba/samba 3.0.2a

samba/samba 3.0.3

samba/samba 3.0.4 (2 CPE variants)

samba/samba 3.0.5

... and 28 more

Published Apr 25, 2016

Tracked Since Feb 18, 2026