CVE-2016-7429
NTP before 4.2.8p9 changes the peer structure to the interface it receives the response from a source, which allows remote attackers to cause a denial of service (prevent communication with a source) by sending a response for a source to an interface…
Does this matter?
Lower severity and a low EPSS score (7.36%). Track it; it rarely justifies an emergency change on its own.
Description
NTP before 4.2.8p9 changes the peer structure to the interface it receives the response from a source, which allows remote attackers to cause a denial of service (prevent communication with a source) by sending a response for a source to an interface the source does not use.
- CVSS 3.0
- 3.7 LOWCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 7.36% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-18
- Affected
- ntp/ntp
- Source
- cve@mitre.org
EPSS moved from 9.5% on 21 September 2026 to 7.4% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://nwtime.org/ntp428p9_release/Release Notes, Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0252.html
- http://support.ntp.org/bin/view/Main/NtpBug3072Issue Tracking, Mitigation, Vendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesVendor Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/94453
- http://www.securitytracker.com/id/1037354
- https://bto.bluecoat.com/security-advisory/sa139
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- https://www.kb.cert.org/vuls/id/633847Third Party Advisory, US Government Resource
- http://nwtime.org/ntp428p9_release/Release Notes, Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0252.html
- http://support.ntp.org/bin/view/Main/NtpBug3072Issue Tracking, Mitigation, Vendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesVendor Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/94453
- http://www.securitytracker.com/id/1037354
- https://bto.bluecoat.com/security-advisory/sa139
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_us
- https://www.kb.cert.org/vuls/id/633847Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.