CVE-2016-2113

CVE-2016-2113 is a high-severity vulnerability in Samba with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-310.

Key facts

• Severity: High (CVSS 3.x base score 7.4)
• CVSS v2: 5.8
• EPSS exploit prediction: 3% (83rd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-310
• Affected product: Samba
• Published: 2016-04-25
• Last modified: 2026-06-17

Description

Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not verify X.509 certificates from TLS servers, which allows man-in-the-middle attackers to spoof LDAPS and HTTPS servers and obtain sensitive information via a crafted certificate.

Frequently asked questions

What is CVE-2016-2113?

Samba 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 does not verify X.509 certificates from TLS servers, which allows man-in-the-middle attackers to spoof LDAPS and HTTPS servers and obtain sensitive information via a crafted certificate.

How severe is CVE-2016-2113?

CVE-2016-2113 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2016-2113 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2113?

CVE-2016-2113 primarily affects Samba. In total, 75 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-2113?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2016-2113 published?

CVE-2016-2113 was published on 2016-04-25 and last updated on 2026-06-17.

References

• http://badlock.org/
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182185.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182272.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-April/182288.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00022.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00023.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00024.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
• http://rhn.redhat.com/errata/RHSA-2016-0612.html
• http://rhn.redhat.com/errata/RHSA-2016-0614.html
• http://rhn.redhat.com/errata/RHSA-2016-0618.html
• http://rhn.redhat.com/errata/RHSA-2016-0620.html
• http://www.debian.org/security/2016/dsa-3548
• http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
• http://www.securitytracker.com/id/1035533
• http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.458012
• http://www.ubuntu.com/usn/USN-2950-1
• http://www.ubuntu.com/usn/USN-2950-2
• http://www.ubuntu.com/usn/USN-2950-3
• http://www.ubuntu.com/usn/USN-2950-4
• http://www.ubuntu.com/usn/USN-2950-5
• https://bto.bluecoat.com/security-advisory/sa122
• https://security.gentoo.org/glsa/201612-47
• https://www.samba.org/samba/history/samba-4.2.10.html
• https://www.samba.org/samba/latest_news.html#4.4.2
• https://www.samba.org/samba/security/CVE-2016-2113.html

Affected products (75)

• 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:*:*:*:*:*:*:*

More vulnerabilities in Samba

• CVE-2015-0240 — Critical (CVSS 10.0): The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before…
• CVE-2012-1182 — Critical (CVSS 10.0): The RPC code generator in Samba 3.x before 3.4.16, 3.5.x before 3.5.14, and 3.6.x before 3.6.4 does not implement…
• CVE-2007-2446 — Critical (CVSS 10.0): Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through 3.0.25rc3 allow remote attackers…
• CVE-2004-0882 — Critical (CVSS 10.0): Buffer overflow in the QFILEPATHINFO request handler in Samba 3.0.x through 3.0.7 may allow remote attackers to execute…
• CVE-2004-1154 — Critical (CVSS 10.0): Integer overflow in the Samba daemon (smbd) in Samba 2.x and 3.0.x through 3.0.9 allows remote authenticated users to…
• CVE-2004-0600 — Critical (CVSS 10.0): Buffer overflow in the Samba Web Administration Tool (SWAT) in Samba 3.0.2 to 3.0.4 allows remote attackers to execute…

All CVEs affecting Samba →

Other CWE-310 (Cryptographic Issues) vulnerabilities

• CVE-2014-7878 — Critical (CVSS 10.0): The Application Lifecycle Service (ALS) in HP Helion Cloud Development Platform 1.0, when a virtual machine is derived…
• CVE-2013-3712 — Critical (CVSS 10.0): SUSE Studio Onsite 1.3.x before 1.3.6 and SUSE Studio Extension for System z 1.3 uses "static" secret tokens, which has…
• CVE-2013-6952 — Critical (CVSS 10.0): The Belkin WeMo Home Automation firmware before 3949 has a hardcoded GPG key, which makes it easier for remote…
• CVE-2013-6838 — Critical (CVSS 10.0): An unspecified Enghouse Interactive Professional Services "addon product" in Enghouse Interactive IVR Pro (VIP2000)…
• CVE-2013-0137 — Critical (CVSS 10.0): The default configuration of the Digital Alert Systems DASDEC EAS device before 2.0-2 and the Monroe Electronics R189…
• CVE-2011-5123 — Critical (CVSS 10.0): The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not check whether X.509 certificates in…

Browse all CWE-310 (Cryptographic Issues) vulnerabilities →