Description The SMB1 protocol implementation in Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not recognize the "server signing = mandatory" setting, which allows man-in-the-middle attackers to spoof SMB servers by modifying the client-server data stream.
Metrics CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0 SSVC
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
Weakness Enumeration Affected Products Product Versions samba samba 4.0.0
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.0.6
4.0.7
4.0.8
4.0.9
4.0.10
4.0.11
4.0.12
4.0.13
4.0.14
4.0.15
4.0.16
4.0.17
4.0.18
4.0.19
4.0.20
4.0.21
4.0.22
4.0.23
4.0.24
4.0.25
4.0.26
4.1.0
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
4.1.7
4.1.8
4.1.9
4.1.10
4.1.11
4.1.12
4.1.13
4.1.14
4.1.15
4.1.16
4.1.17
4.1.18
4.1.19
4.1.20
4.1.21
4.1.22
4.1.23
4.2.0 rc1
4.2.0 rc2
4.2.0 rc3
4.2.0 rc4
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
4.2.9
4.3.0
4.3.1
4.3.2
4.3.3
4.3.4
4.3.5
4.3.6
4.4.0
Viewing 5 of 72 versions. View all CPE cpe:2.3:a:samba:samba:4.0.0:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.1:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.2:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.3:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.4:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.5:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.6:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.7:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.8:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.9:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.10:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.11:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.12:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.13:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.14:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.15:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.16:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.17:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.18:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.19:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.20:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.21:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.22:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.23:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.24:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.25:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.0.26:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.0:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.1:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.2:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.3:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.4:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.5:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.6:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.7:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.8:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.9:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.10:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.11:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.12:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.13:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.14:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.15:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.16:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.17:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.18:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.19:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.20:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.21:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.22:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.1.23:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.0:rc1:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.0:rc2:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.0:rc3:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.0:rc4:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.1:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.2:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.3:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.4:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.5:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.6:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.7:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.8:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.2.9:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.0:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.1:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.2:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.3:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.4:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.5:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.3.6:*:*:*:*:*:*:* cpe:2.3:a:samba:samba:4.4.0:*:*:*:*:*:*:* Remediation No remediation found in references. canonical ubuntu linux 14.04
15.10
16.04
CPE cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:* cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Remediation No remediation found in references.
Change History 13 change records found show changes
Date Action Recorded By Jun 17, 2026 CVE Modified [email protected] May 6, 2026 Status Change [email protected] Nov 21, 2024 CVE Modified CVE May 14, 2024 CVE Modified [email protected] Dec 31, 2016 CVE Modified [email protected] Dec 3, 2016 CVE Modified [email protected] Dec 1, 2016 CVE Modified [email protected] Nov 28, 2016 CVE Modified [email protected] Oct 4, 2016 CVE Modified [email protected] Jun 3, 2016 Modified Analysis [email protected] Jun 3, 2016 CVE Modified [email protected] Apr 28, 2016 Modified Analysis [email protected] Apr 27, 2016 Initial Analysis [email protected]