CVE-2016-1547 — Vulnetix

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CVE-2016-1547 PUBLISHED

An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.

EPSS 3.66% · 87.8th percentile

Risk Scores

EPSS Score

3.66%

87.8th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:14.04:LTS	ntp	0, 1:4.2.6.p5+dfsg-3ubuntu2, 1:4.2.6.p5+dfsg-3ubuntu2.14.04.1
Ubuntu:16.04:LTS	ntp	0, 1:4.2.6.p5+dfsg-3ubuntu8, 1:4.2.6.p5+dfsg-3ubuntu8.1

Timeline

Apr 26, 2016 CVE Published
May 26, 2017 PoC Published
Oct 2, 2020 PoC Published
Nov 6, 2020 PoC Published
Sep 6, 2021 PoC Published
Feb 4, 2022 EPSS Score
Mar 28, 2022 EPSS Score
Jul 10, 2022 EPSS Score
Sep 1, 2022 EPSS Score
Dec 14, 2022 EPSS Score
Feb 4, 2023 EPSS Score
Mar 7, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2016-1547 third-party-advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security third-party-advisory
https://ubuntu.com/security/notices/USN-3096-1 vendor-advisory
https://www.cve.org/CVERecord?id=CVE-2016-1547 third-party-advisory

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