High severity8.1NVD Advisory· Published Apr 18, 2019· Updated Jun 17, 2026

CVE-2019-11331

Description

Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not required, which makes it easier for remote attackers to conduct off-path attacks.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Network Time Protocol/Network Time Protocolllm-create

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/108010nvdThird Party Advisory
tools.ietf.org/html/draft-gont-ntp-port-randomization-00nvdThird Party Advisory
support.f5.com/csp/article/K09940637nvd
support.f5.com/csp/article/K09940637nvd

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