CVE-2016-2118

HIGH

Samba 3.6.0-4.2.9, 4.3.0-4.3.7, 4.4.0-4.4.1 - Man-in-the-Middle Protocol Downgrade via DCERPC Connection Tampering

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2016-2118. PoCs published by nickanderson.

AI-analyzed exploit summary The repository contains only a Makefile for installing files to a CFEngine masterfiles directory, with no actual exploit code or technical details about CVE-2016-2118. It appears to be a placeholder or partial implementation.

Description

The MS-SAMR and MS-LSAD protocol implementations 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 mishandle DCERPC connections, which allows man-in-the-middle attackers to perform protocol-downgrade attacks and impersonate users by modifying the client-server data stream, aka "BADLOCK."

Exploits (1)

nomisec STUB

by nickanderson · poc

https://github.com/nickanderson/cfengine-CVE-2016-2118

View Code ZIP pw:eip

The repository contains only a Makefile for installing files to a CFEngine masterfiles directory, with no actual exploit code or technical details about CVE-2016-2118. It appears to be a placeholder or partial implementation.

Classification

Stub 90%

Attack Type

Other

Complexity

Trivial

Reliability

Theoretical

Target: CFEngine

Auth required

Prerequisites: Access to CFEngine masterfiles directory

devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (45)

Core 45

Core References

Mailing List, Third Party Advisory vendor-advisory x_refsource_slackware

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory vendor-advisory x_refsource_ubuntu

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

Third Party Advisory x_refsource_confirm

https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05166182

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Technical Description, Third Party Advisory x_refsource_misc

http://badlock.org/

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory x_refsource_confirm

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory vendor-advisory x_refsource_ubuntu

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

Third Party Advisory x_refsource_confirm

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/86002

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Vendor Advisory x_refsource_confirm

https://www.samba.org/samba/security/CVE-2016-2118.html

Vendor Advisory x_refsource_confirm

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

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

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

Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn

https://www.kb.cert.org/vuls/id/813296

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory x_refsource_confirm

https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party Advisory x_refsource_confirm

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

Third Party 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, Third Party Advisory vendor-advisory x_refsource_suse

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

Third Party 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

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory vendor-advisory x_refsource_ubuntu

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

Third Party Advisory x_refsource_confirm

https://access.redhat.com/security/vulnerabilities/badlock

Third Party Advisory vendor-advisory x_refsource_redhat

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

Third Party Advisory x_refsource_confirm

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

Third Party Advisory x_refsource_confirm

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40196

Third Party Advisory vendor-advisory x_refsource_ubuntu

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

Third Party Advisory x_refsource_confirm

https://kb.netapp.com/support/s/article/ka51A0000008SXzQAM/smb-vulnerabilities-in-multiple-netapp-products

Scores

CVSS v3 7.5

EPSS 0.3718

EPSS Percentile 98.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE

CWE-254

Status published

Products (7)

canonical/ubuntu_linux 12.04

canonical/ubuntu_linux 14.04 (2 CPE variants)

canonical/ubuntu_linux 15.10

canonical/ubuntu_linux 16.04 (2 CPE variants)

debian/debian_linux 7.0

debian/debian_linux 8.0

samba/samba 3.6.0 - 4.2.10

Published Apr 12, 2016

Tracked Since Feb 18, 2026