CVE-2016-2517 — Vulnetix

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CVE-2016-2517 PUBLISHED

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.

EPSS 3.01% · 86.5th percentile

Risk Scores

EPSS Score

3.01%

86.5th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:Pro: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
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 28, 2023 EPSS Score
May 19, 2023 EPSS Score

References

https://ubuntu.com/security/CVE-2016-2517 third-party-advisory
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2016-2517 third-party-advisory

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