VulnerabilityModified
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 required, which makes it easier for remote attackers to conduct off-path attacks.
HIGH 8.1EPSS 2.64%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.64%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.64% probability · 85th percentile
- CISA KEV
- Not listed
- Affected
- ntp/ntp
- Source
- cve@mitre.org
References
- 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&%3Butm_medium=RSS
- https://tools.ietf.org/html/draft-gont-ntp-port-randomization-00Third Party Advisory
- 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&%3Butm_medium=RSS
- https://tools.ietf.org/html/draft-gont-ntp-port-randomization-00Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.