Vulnerability Monitor

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CVE-2016-2111

The NETLOGON service 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, when a domain controller is configured, allows remote attackers to spoof the computer name of a secure channel's endpoint, and obtain sensitive session information, by running a crafted application and leveraging the ability to sniff network traffic, a related issue to CVE-2015-0005.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.3, requiring local system access to exploit but requires specific conditions to be met though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), for affected systems. Impacting 2 products from samba, from canonical organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2016, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2016-04-25T00:59:02.017

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 6.3 (MEDIUM)

CVSSv2 Vector

AV:A/AC:M/Au:N/C:P/I:P/A:N

Access Vector: ADJACENT_NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

5.5

Impact Score

4.9

Weaknesses

Type: Primary
CWE-254

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	samba	samba	3.0.0	Yes
Application	samba	samba	3.0.1	Yes
Application	samba	samba	3.0.2	Yes
Application	samba	samba	3.0.2	Yes
Application	samba	samba	3.0.2a	Yes
Application	samba	samba	3.0.3	Yes
Application	samba	samba	3.0.4	Yes
Application	samba	samba	3.0.4	Yes
Application	samba	samba	3.0.5	Yes
Application	samba	samba	3.0.6	Yes
Application	samba	samba	3.0.7	Yes
Application	samba	samba	3.0.8	Yes
Application	samba	samba	3.0.9	Yes
Application	samba	samba	3.0.10	Yes
Application	samba	samba	3.0.11	Yes
Application	samba	samba	3.0.12	Yes
Application	samba	samba	3.0.13	Yes
Application	samba	samba	3.0.14	Yes
Application	samba	samba	3.0.14	Yes
Application	samba	samba	3.0.14a	Yes
Application	samba	samba	3.0.15	Yes
Application	samba	samba	3.0.16	Yes
Application	samba	samba	3.0.17	Yes
Application	samba	samba	3.0.18	Yes
Application	samba	samba	3.0.19	Yes
Application	samba	samba	3.0.20	Yes
Application	samba	samba	3.0.20	Yes
Application	samba	samba	3.0.20	Yes
Application	samba	samba	3.0.20a	Yes
Application	samba	samba	3.0.20b	Yes
Application	samba	samba	3.0.21	Yes
Application	samba	samba	3.0.21	Yes
Application	samba	samba	3.0.21	Yes
Application	samba	samba	3.0.21	Yes
Application	samba	samba	3.0.21a	Yes
Application	samba	samba	3.0.21b	Yes
Application	samba	samba	3.0.21c	Yes
Application	samba	samba	3.0.22	Yes
Application	samba	samba	3.0.23	Yes
Application	samba	samba	3.0.23	Yes
Application	samba	samba	3.0.23	Yes
Application	samba	samba	3.0.23	Yes
Application	samba	samba	3.0.23	Yes
Application	samba	samba	3.0.23a	Yes
Application	samba	samba	3.0.23b	Yes
Application	samba	samba	3.0.23c	Yes
Application	samba	samba	3.0.23d	Yes
Application	samba	samba	3.0.24	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25	Yes
Application	samba	samba	3.0.25a	Yes
Application	samba	samba	3.0.25b	Yes
Application	samba	samba	3.0.25c	Yes
Application	samba	samba	3.0.26	Yes
Application	samba	samba	3.0.26	Yes
Application	samba	samba	3.0.26a	Yes
Application	samba	samba	3.0.27	Yes
Application	samba	samba	3.0.27	Yes
Application	samba	samba	3.0.28	Yes
Application	samba	samba	3.0.28	Yes
Application	samba	samba	3.0.29	Yes
Application	samba	samba	3.0.30	Yes
Application	samba	samba	3.0.31	Yes
Application	samba	samba	3.0.32	Yes
Application	samba	samba	3.0.33	Yes
Application	samba	samba	3.0.34	Yes
Application	samba	samba	3.0.35	Yes
Application	samba	samba	3.0.36	Yes
Application	samba	samba	3.0.37	Yes
Application	samba	samba	3.2.0	Yes
Application	samba	samba	3.2.1	Yes
Application	samba	samba	3.2.2	Yes
Application	samba	samba	3.2.3	Yes
Application	samba	samba	3.2.4	Yes
Application	samba	samba	3.2.5	Yes
Application	samba	samba	3.2.6	Yes
Application	samba	samba	3.2.7	Yes
Application	samba	samba	3.2.8	Yes
Application	samba	samba	3.2.9	Yes
Application	samba	samba	3.2.10	Yes
Application	samba	samba	3.2.11	Yes
Application	samba	samba	3.2.12	Yes
Application	samba	samba	3.2.13	Yes
Application	samba	samba	3.2.14	Yes
Application	samba	samba	3.2.15	Yes
Application	samba	samba	3.3.0	Yes
Application	samba	samba	3.3.1	Yes
Application	samba	samba	3.3.2	Yes
Application	samba	samba	3.3.3	Yes
Application	samba	samba	3.3.4	Yes
Application	samba	samba	3.3.5	Yes
Application	samba	samba	3.3.6	Yes
Application	samba	samba	3.3.7	Yes
Application	samba	samba	3.3.8	Yes
Application	samba	samba	3.3.9	Yes
Application	samba	samba	3.3.10	Yes
Application	samba	samba	3.3.11	Yes
Application	samba	samba	3.3.12	Yes
Application	samba	samba	3.3.13	Yes
Application	samba	samba	3.3.14	Yes
Application	samba	samba	3.3.15	Yes
Application	samba	samba	3.3.16	Yes
Application	samba	samba	3.4.0	Yes
Application	samba	samba	3.4.1	Yes
Application	samba	samba	3.4.2	Yes
Application	samba	samba	3.4.3	Yes
Application	samba	samba	3.4.4	Yes
Application	samba	samba	3.4.5	Yes
Application	samba	samba	3.4.6	Yes
Application	samba	samba	3.4.7	Yes
Application	samba	samba	3.4.8	Yes
Application	samba	samba	3.4.9	Yes
Application	samba	samba	3.4.10	Yes
Application	samba	samba	3.4.11	Yes
Application	samba	samba	3.4.12	Yes
Application	samba	samba	3.4.13	Yes
Application	samba	samba	3.4.14	Yes
Application	samba	samba	3.4.15	Yes
Application	samba	samba	3.4.16	Yes
Application	samba	samba	3.4.17	Yes
Application	samba	samba	3.5.0	Yes
Application	samba	samba	3.5.1	Yes
Application	samba	samba	3.5.2	Yes
Application	samba	samba	3.5.3	Yes
Application	samba	samba	3.5.4	Yes
Application	samba	samba	3.5.5	Yes
Application	samba	samba	3.5.6	Yes
Application	samba	samba	3.5.7	Yes
Application	samba	samba	3.5.8	Yes
Application	samba	samba	3.5.9	Yes
Application	samba	samba	3.5.10	Yes
Application	samba	samba	3.5.11	Yes
Application	samba	samba	3.5.12	Yes
Application	samba	samba	3.5.13	Yes
Application	samba	samba	3.5.14	Yes
Application	samba	samba	3.5.15	Yes
Application	samba	samba	3.5.16	Yes
Application	samba	samba	3.5.17	Yes
Application	samba	samba	3.5.18	Yes
Application	samba	samba	3.5.19	Yes
Application	samba	samba	3.5.20	Yes
Application	samba	samba	3.5.21	Yes
Application	samba	samba	3.5.22	Yes
Application	samba	samba	3.6.0	Yes
Application	samba	samba	3.6.1	Yes
Application	samba	samba	3.6.2	Yes
Application	samba	samba	3.6.3	Yes
Application	samba	samba	3.6.4	Yes
Application	samba	samba	3.6.5	Yes
Application	samba	samba	3.6.6	Yes
Application	samba	samba	3.6.7	Yes
Application	samba	samba	3.6.8	Yes
Application	samba	samba	3.6.9	Yes
Application	samba	samba	3.6.10	Yes
Application	samba	samba	3.6.11	Yes
Application	samba	samba	3.6.12	Yes
Application	samba	samba	3.6.13	Yes
Application	samba	samba	3.6.14	Yes
Application	samba	samba	3.6.15	Yes
Application	samba	samba	3.6.16	Yes
Application	samba	samba	3.6.17	Yes
Application	samba	samba	3.6.18	Yes
Application	samba	samba	3.6.19	Yes
Application	samba	samba	3.6.20	Yes
Application	samba	samba	3.6.21	Yes
Application	samba	samba	3.6.22	Yes
Application	samba	samba	3.6.23	Yes
Application	samba	samba	3.6.24	Yes
Application	samba	samba	3.6.25	Yes
Application	samba	samba	4.0.0	Yes
Application	samba	samba	4.0.1	Yes
Application	samba	samba	4.0.2	Yes
Application	samba	samba	4.0.3	Yes
Application	samba	samba	4.0.4	Yes
Application	samba	samba	4.0.5	Yes
Application	samba	samba	4.0.6	Yes
Application	samba	samba	4.0.7	Yes
Application	samba	samba	4.0.8	Yes
Application	samba	samba	4.0.9	Yes
Application	samba	samba	4.0.10	Yes
Application	samba	samba	4.0.11	Yes
Application	samba	samba	4.0.12	Yes
Application	samba	samba	4.0.13	Yes
Application	samba	samba	4.0.14	Yes
Application	samba	samba	4.0.15	Yes
Application	samba	samba	4.0.16	Yes
Application	samba	samba	4.0.17	Yes
Application	samba	samba	4.0.18	Yes
Application	samba	samba	4.0.19	Yes
Application	samba	samba	4.0.20	Yes
Application	samba	samba	4.0.21	Yes
Application	samba	samba	4.0.22	Yes
Application	samba	samba	4.0.23	Yes
Application	samba	samba	4.0.24	Yes
Application	samba	samba	4.0.25	Yes
Application	samba	samba	4.0.26	Yes
Application	samba	samba	4.1.0	Yes
Application	samba	samba	4.1.1	Yes
Application	samba	samba	4.1.2	Yes
Application	samba	samba	4.1.3	Yes
Application	samba	samba	4.1.4	Yes
Application	samba	samba	4.1.5	Yes
Application	samba	samba	4.1.6	Yes
Application	samba	samba	4.1.7	Yes
Application	samba	samba	4.1.8	Yes
Application	samba	samba	4.1.9	Yes
Application	samba	samba	4.1.10	Yes
Application	samba	samba	4.1.11	Yes
Application	samba	samba	4.1.12	Yes
Application	samba	samba	4.1.13	Yes
Application	samba	samba	4.1.14	Yes
Application	samba	samba	4.1.15	Yes
Application	samba	samba	4.1.16	Yes
Application	samba	samba	4.1.17	Yes
Application	samba	samba	4.1.18	Yes
Application	samba	samba	4.1.19	Yes
Application	samba	samba	4.1.20	Yes
Application	samba	samba	4.1.21	Yes
Application	samba	samba	4.1.22	Yes
Application	samba	samba	4.1.23	Yes
Application	samba	samba	4.2.0	Yes
Application	samba	samba	4.2.0	Yes
Application	samba	samba	4.2.0	Yes
Application	samba	samba	4.2.0	Yes
Application	samba	samba	4.2.1	Yes
Application	samba	samba	4.2.2	Yes
Application	samba	samba	4.2.3	Yes
Application	samba	samba	4.2.4	Yes
Application	samba	samba	4.2.5	Yes
Application	samba	samba	4.2.6	Yes
Application	samba	samba	4.2.7	Yes
Application	samba	samba	4.2.8	Yes
Application	samba	samba	4.2.9	Yes
Application	samba	samba	4.3.0	Yes
Application	samba	samba	4.3.1	Yes
Application	samba	samba	4.3.2	Yes
Application	samba	samba	4.3.3	Yes
Application	samba	samba	4.3.4	Yes
Application	samba	samba	4.3.5	Yes
Application	samba	samba	4.3.6	Yes
Application	samba	samba	4.4.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	15.10	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes

References

http://badlock.org/ ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0611.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0612.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0613.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0614.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0618.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0619.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0620.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0621.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0623.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0624.html ([email protected])
http://rhn.redhat.com/errata/RHSA-2016-0625.html ([email protected])
http://www.debian.org/security/2016/dsa-3548 ([email protected])
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html ([email protected])
http://www.securitytracker.com/id/1035533 ([email protected])
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012 ([email protected])
http://www.ubuntu.com/usn/USN-2950-1 ([email protected])
http://www.ubuntu.com/usn/USN-2950-2 ([email protected])
http://www.ubuntu.com/usn/USN-2950-3 ([email protected])
http://www.ubuntu.com/usn/USN-2950-4 ([email protected])
http://www.ubuntu.com/usn/USN-2950-5 Third Party Advisory ([email protected])
https://bto.bluecoat.com/security-advisory/sa122 ([email protected])
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821 ([email protected])
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964 Third Party Advisory ([email protected])
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399 Third Party Advisory ([email protected])
https://security.gentoo.org/glsa/201612-47 ([email protected])
https://www.samba.org/samba/history/samba-4.2.10.html ([email protected])
https://www.samba.org/samba/latest_news.html#4.4.2 ([email protected])
https://www.samba.org/samba/security/CVE-2016-2111.html Patch, Vendor Advisory ([email protected])
http://badlock.org/ (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00046.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0611.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0612.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0613.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0614.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0618.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0619.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0620.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0621.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0623.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0624.html (af854a3a-2127-422b-91ae-364da2661108)
http://rhn.redhat.com/errata/RHSA-2016-0625.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2016/dsa-3548 (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1035533 (af854a3a-2127-422b-91ae-364da2661108)
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2950-1 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2950-2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2950-3 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2950-4 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-2950-5 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bto.bluecoat.com/security-advisory/sa122 (af854a3a-2127-422b-91ae-364da2661108)
https://h20566.www2.hpe.com/hpsc/doc/public/display?docId=emr_na-c05087821 (af854a3a-2127-422b-91ae-364da2661108)
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05082964 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05162399 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201612-47 (af854a3a-2127-422b-91ae-364da2661108)
https://www.samba.org/samba/history/samba-4.2.10.html (af854a3a-2127-422b-91ae-364da2661108)
https://www.samba.org/samba/latest_news.html#4.4.2 (af854a3a-2127-422b-91ae-364da2661108)
https://www.samba.org/samba/security/CVE-2016-2111.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For samba's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.