NTP Denial of Service Vulnerability

CVE-2016-2517 · MEDIUM Severity

AV:N/AC:H/AU:S/C:N/I:N/A:C

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.

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