CVE-2016-2114
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.67% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 85.5% of scored records. A rank, not a probability.
- NVD base score
- 5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-04-25 00:00Z10 YR AGO
- Last updated
- 2024-08-05 23:17Z2 YR AGO
- Reserved
- 2016-01-29
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 69cd212bb7ba23556d222684214284e3494d93dbbbce92d8f739c606b5c81b54
05 Affected products
06 References
- www.slackware.comSSA:2016-106-02http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012
- rhn.redhat.comRHSA-2016:0612http://rhn.redhat.com/errata/RHSA-2016-0612.html
- www.ubuntu.comUSN-2950-1http://www.ubuntu.com/usn/USN-2950-1
- www.securityfocus.com86011http://www.securityfocus.com/bid/86011
- badlock.orghttp://badlock.org/
- www.samba.orghttps://www.samba.org/samba/security/CVE-2016-2114.html
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- www.ubuntu.comUSN-2950-5http://www.ubuntu.com/usn/USN-2950-5
- www.samba.orghttps://www.samba.org/samba/history/samba-4.2.10.html
- lists.fedoraproject.orgFEDORA-2016-be53260726http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
- rhn.redhat.comRHSA-2016:0618http://rhn.redhat.com/errata/RHSA-2016-0618.html
- www.samba.orghttps://www.samba.org/samba/latest_news.html#4.4.2
- www.securitytracker.com1035533http://www.securitytracker.com/id/1035533
- lists.fedoraproject.orgFEDORA-2016-48b3761baahttp://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
- rhn.redhat.comRHSA-2016:0614http://rhn.redhat.com/errata/RHSA-2016-0614.html
- rhn.redhat.comRHSA-2016:0620http://rhn.redhat.com/errata/RHSA-2016-0620.html
- lists.opensuse.orgopenSUSE-SU-2016:1106http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
- bto.bluecoat.comhttps://bto.bluecoat.com/security-advisory/sa122
- www.ubuntu.comUSN-2950-3http://www.ubuntu.com/usn/USN-2950-3
- lists.fedoraproject.orgFEDORA-2016-383fce04e2http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
- lists.opensuse.orgopenSUSE-SU-2016:1107http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
- security.gentoo.orgGLSA-201612-47https://security.gentoo.org/glsa/201612-47
- www.debian.orgDSA-3548http://www.debian.org/security/2016/dsa-3548
- www.ubuntu.comUSN-2950-2http://www.ubuntu.com/usn/USN-2950-2
- www.ubuntu.comUSN-2950-4http://www.ubuntu.com/usn/USN-2950-4
07 Fixed in
Debian 12
- samba Fixed in 2:4.3.7+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- samba Fixed in 2:4.3.7+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- samba Fixed in 2:4.3.7+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- samba Fixed in 2:4.3.8+dfsg-0ubuntu0.14.04.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- samba Fixed in 2:4.3.8+dfsg-0ubuntu1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.