CVE-2016-2517

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CVSS 3.0

5.3 medium

EPSS

9%p95

Published

Jan 30, 2017 (Jan 30, 2017)

Modified

Jun 17, 2026

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.

Vendors: ntp
Products: ntp
Weakness: CWE-20
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (8.8%)

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