NTP BUG 3110: Windows: ntpd DoS by oversized UDP packet

Last update: February 15, 2022 20:59 UTC (43fbd379b)


Summary

Resolved 4.2.8p9 21 Nov 2016
References Bug 3110 CVE-2016-9312
Affects Windows only: ntp-4.?.?, up to but not including ntp-4.2.8p9,
and ntp-4.3.0 up to, but not including ntp-4.3.94.
Resolved in 4.2.8p9.
CVSS2 Score HIGH 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS3 Score HIGH 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

If a vulnerable instance of ntpd on Windows receives a crafted malicious packet that is “too big”, ntpd will stop working.


Mitigation


Credit

This weakness was discovered by Robert Pajak of ABB.


Timeline