CVE-2016-1551
3.7 · LOWOverview
CVE-2016-1551 is a low-severity vulnerability affecting ntp ntp. It was published on January 27, 2017 and has a CVSS 3.0 base score of 3.7 (LOW).
This vulnerability has a CVSS 3.0 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.
Remediation
Check the references section for vendor advisories and patches from ntp. Update ntp to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
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References
Frequently Asked Questions
What is CVE-2016-1551?
CVE-2016-1551 is a low-severity vulnerability affecting ntp ntp. It was published on January 27, 2017 and has a CVSS 3.0 base score of 3.7 (LOW).
How severe is CVE-2016-1551?
This vulnerability has a CVSS 3.0 base score of 3.7, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2016-1551?
Check the references section for vendor advisories and patches from ntp. Update ntp to the latest patched version. 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-2016-1551?
CyberStrike's AI-powered security agents can automatically detect CVE-2016-1551 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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