Home/CVE/Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not req
CVE

CVE-2019-11331

Network Time Protocol (NTP), as specified in RFC 5905, uses port 123 even for modes where a fixed port number is not req

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.

HIGH · CVSS 8.1 EPSS 0.01051
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
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Affected Products & Versions

1
ntpall versions
▣

Scoring & Timeline

8.1
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 Apr 2019 · 10:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/108010Third Party Advisory
https://support.f5.com/csp/article/K09940637
https://support.f5.com/csp/article/K09940637?utm_source=f5support&amp
https://tools.ietf.org/html/draft-gont-ntp-port-randomization-00Third Party Advisory
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