NTP BUG 3044: Processing spoofed server packets

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


Summary

Resolved 4.2.8p8 02 June 2016
References Bug 3044 CVE-2016-4954
Affects ntp-4, up to but not including ntp-4.2.8p8,
and ntp-4.3.0 up to, but not including ntp-4.3.93.
Resolved in 4.2.8p8
CVSS2 Score LOW 2.6 AV:N/AC:H/Au:N/C:N/I:N/A:P
CVSS3 Score LOW 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

An attacker who is able to spoof packets with correct origin timestamps from enough servers before the expected response packets arrive at the target machine can affect some peer variables and, for example, cause a false leap indication to be set.


Mitigation


Credit

This weakness was discovered by Jakub Prokes of Red Hat.


Timeline