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CVE-2016-1548

7.2 · HIGH

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server.

Published Jan 6, 2017CWE-19EPSS 3.81%

Overview

CVE-2016-1548 is a high-severity vulnerability. It was published on January 6, 2017 and has a CVSS 3.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.

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.fedoraproject.org/pipermail/package-announce/2016-May/183647.htmlReflists.fedoraproject.org/pipermail/package-announce/2016-May/184669.htmlReflists.opensuse.org/opensuse-security-announce/2016-05/msg00034.htmlReflists.opensuse.org/opensuse-security-announce/2016-05/msg00037.htmlReflists.opensuse.org/opensuse-security-announce/2016-05/msg00052.htmlReflists.opensuse.org/opensuse-security-announce/2016-06/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2016-06/msg00020.htmlReflists.opensuse.org/opensuse-security-announce/2016-07/msg00026.htmlReflists.opensuse.org/opensuse-security-announce/2016-08/msg00042.htmlReflists.opensuse.org/opensuse-updates/2016-05/msg00114.html

How CyberStrike helps

Frequently asked questions

What is CVE-2016-1548?

CVE-2016-1548 is a high-severity vulnerability. It was published on January 6, 2017 and has a CVSS 3.0 base score of 7.2 (HIGH).

How severe is CVE-2016-1548?

This vulnerability has a CVSS 3.0 base score of 7.2, 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-2016-1548?

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-2016-1548?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-1548 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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