CVE-2016-7434
The read_mru_list function in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (crash) via a crafted mrulist query.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 53.1%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
The read_mru_list function in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (crash) via a crafted mrulist query.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 53.09% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 21 November 2016
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- ntp/ntp · hpe/hpux-ntp
- Source
- cve@mitre.org
EPSS 53.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://nwtime.org/ntp428p9_release/Third Party Advisory
- http://support.ntp.org/bin/view/Main/NtpBug3082Issue Tracking, Mitigation, Vendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesRelease Notes, Vendor Advisory
- http://www.securityfocus.com/bid/94448Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037354Third Party Advisory, VDB Entry
- https://bto.bluecoat.com/security-advisory/sa139Third Party Advisory
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usThird Party Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.ascThird Party Advisory
- https://www.exploit-db.com/exploits/40806/Exploit, Third Party Advisory, VDB Entry
- https://www.kb.cert.org/vuls/id/633847Third Party Advisory, US Government Resource
- http://nwtime.org/ntp428p9_release/Third Party Advisory
- http://support.ntp.org/bin/view/Main/NtpBug3082Issue Tracking, Mitigation, Vendor Advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_VulnerabilitiesRelease Notes, Vendor Advisory
- http://www.securityfocus.com/bid/94448Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037354Third Party Advisory, VDB Entry
- https://bto.bluecoat.com/security-advisory/sa139Third Party Advisory
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usThird Party Advisory
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:39.ntp.ascThird Party Advisory
- https://www.exploit-db.com/exploits/40806/Exploit, Third Party Advisory, VDB Entry
- 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.