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Vulnerability record · CVE-2016-2118 · published 12 April 2016

CVE-2016-2118: Samba vulnerability

Samba · Samba

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."

7.5 CVSS 3.1 High EPSS 37% · top 1.5% CWE-254 · CWE-254
7.5CVSS 3.1 base score, v2 6.8
37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
90References
17 Jun 2026Last modified by NVD

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."

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://badlock.org/ Technical DescriptionThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html Mailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html Mailing ListThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html Mailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0611.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0612.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0613.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0614.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0618.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0619.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0620.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0621.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0623.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0624.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-0625.html Third Party Advisory
http://www.debian.org/security/2016/dsa-3548 Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securityfocus.com/bid/86002 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1035533 Third Party AdvisoryVDB Entry
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012 Mailing ListThird Party Advisory
http://www.ubuntu.com/usn/USN-2950-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2950-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2950-3 Third Party Advisory
http://www.ubuntu.com/usn/USN-2950-4 Third Party Advisory
http://www.ubuntu.com/usn/USN-2950-5 Third Party Advisory
https://access.redhat.com/security/vulnerabilities/badlock Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa122 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399 Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05166182 Third Party Advisory
https://help.ecostruxureit.com/display/public/UADCO8x/StruxureWare+Data+Center+Operation+Software+Vulnerability+Fixes Third Party Advisory
https://kb.netapp.com/support/s/article/ka51A0000008SXzQAM/smb-vulnerabilities-in-multiple-netapp-products Third Party Advisory
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40196 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2016-2118), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.