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CVE-2016-2123

8.8 · HIGH

A flaw was found in samba versions 4.0.0 to 4.5.2.

Published Nov 1, 2018CWE-122EPSS 6.23%

Overview

CVE-2016-2123 is a high-severity vulnerability. It was published on November 1, 2018 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation.

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

Refwww.securityfocus.com/bid/94970Refwww.securitytracker.com/id/1037493Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123Refwww.samba.org/samba/security/CVE-2016-2123.htmlRefwww.securityfocus.com/bid/94970Refwww.securitytracker.com/id/1037493Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123Refwww.samba.org/samba/security/CVE-2016-2123.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-2123?

CVE-2016-2123 is a high-severity vulnerability. It was published on November 1, 2018 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2016-2123?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2016-2123?

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-2016-2123?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-2123 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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