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CVE-2016-9042

5.9 · MEDIUM

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9.

Published Jun 4, 2018CWE-20EPSS 3.91%

Overview

CVE-2016-9042 is a medium-severity vulnerability. It was published on June 4, 2018 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.

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

Refpacketstormsecurity.com/files/142101/FreeBSD-Security-Advisory-FreeBSD-SA-17-03.ntp.htmlRefpacketstormsecurity.com/files/142284/Slackware-Security-Advisory-ntp-Updates.htmlRefseclists.org/fulldisclosure/2017/Nov/7Refseclists.org/fulldisclosure/2017/Sep/62Refwww.securityfocus.com/archive/1/540403/100/0/threadedRefwww.securityfocus.com/archive/1/archive/1/540403/100/0/threadedRefwww.securityfocus.com/archive/1/archive/1/540464/100/0/threadedRefwww.securityfocus.com/bid/97046Refwww.securitytracker.com/id/1038123Refwww.securitytracker.com/id/1039427

How CyberStrike helps

Frequently asked questions

What is CVE-2016-9042?

CVE-2016-9042 is a medium-severity vulnerability. It was published on June 4, 2018 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2016-9042?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-9042?

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-2016-9042?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-9042 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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