VDB
CVE-2016-2517
CVE-2016-2517
PUBLISHED
CVSS 5.300000190734863 MEDIUM
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 8.82% · 95.0th percentile
Risk Scores
CVSS 3.0
5.300000190734863
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS Score
8.82%
95.0th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:Pro:14.04:LTS | ntp | 0, 1:4.2.6.p5+dfsg-3ubuntu2.14.04.1, 1:4.2.6.p5+dfsg-3ubuntu2.14.04.2 |
| Ubuntu:16.04:LTS | ntp | 0, 1:4.2.6.p5+dfsg-3ubuntu8, 1:4.2.6.p5+dfsg-3ubuntu9 |
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
- May 21, 2022 EPSS Score
- Jul 13, 2022 EPSS Score
- Oct 28, 2022 EPSS Score
- Feb 11, 2023 EPSS Score
- Mar 7, 2023 EPSS Score
- May 27, 2023 EPSS Score
- Sep 10, 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