CVE-2016-7427

Description

The broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.

Category

4.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 4.55% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory FreeBSD.org Vendor Advisory nwtime.org Vendor Advisory ntp.org Vendor Advisory ntp.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
https://usn.ubuntu.com/3707-2/ vendor advisory
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03883en_us
http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities vendor advisory
http://nwtime.org/ntp428p9_release/ release notes vendor advisory
http://support.ntp.org/bin/view/Main/NtpBug3114 vendor advisory mitigation issue tracking
https://www.kb.cert.org/vuls/id/633847 third party advisory us government resource
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03899en_us
http://www.securitytracker.com/id/1037354 vdb entry
https://bto.bluecoat.com/security-advisory/sa139
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.asc vendor advisory
http://www.securityfocus.com/bid/94447 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2016-7427?
CVE-2016-7427 has been scored as a medium severity vulnerability.
How to fix CVE-2016-7427?
To fix CVE-2016-7427, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-7427 being actively exploited in the wild?
It is possible that CVE-2016-7427 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.