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CVE-2016-2119

7.5 · HIGH

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequentl…

Published Jul 7, 2016CWE-94EPSS 3.10%

Overview

CVE-2016-2119 is a high-severity vulnerability. It was published on July 7, 2016 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-updates/2016-07/msg00060.htmlRefrhn.redhat.com/errata/RHSA-2016-1486.htmlRefrhn.redhat.com/errata/RHSA-2016-1487.htmlRefrhn.redhat.com/errata/RHSA-2016-1494.htmlRefwww.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlRefwww.securityfocus.com/bid/91700Refwww.securitytracker.com/id/1036244Refsecurity.gentoo.org/glsa/201805-07Refwww.samba.org/samba/security/CVE-2016-2119.htmlReflists.opensuse.org/opensuse-updates/2016-07/msg00060.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-2119?

CVE-2016-2119 is a high-severity vulnerability. It was published on July 7, 2016 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2016-2119?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-2119?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-2119?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-2119 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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