VULNERABILITY INTELLIGENCE
CVE-2016-2517
CVSS score5.3 MEDIUM
EPSS probability8.82%
CISA KEVNot currently listed
Published2017-01-30
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Description
NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey. NOTE: this vulnerability exists because of a CVE-2016-2516 regression.
Weakness classification
- CWE-20: Improper Input Validation
Primary references
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Third Party Advisory, VDB Entry
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org — Third Party Advisory, US Government Resource
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108