CVE-2016-2517
high-risk
Published 2017-01-30
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.
Do I need to act?
~
3.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10
Medium
NETWORK
/ HIGH complexity
Affected Products (20)
Affected Vendors
References (16)
Vendor Advisory
http://support.ntp.org/bin/view/Main/NtpBug3010
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory
http://www.securityfocus.com/bid/88189
Third Party Advisory
https://www.kb.cert.org/vuls/id/718152
Vendor Advisory
http://support.ntp.org/bin/view/Main/NtpBug3010
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Third Party Advisory
http://www.securityfocus.com/bid/88189
Third Party Advisory
https://www.kb.cert.org/vuls/id/718152
53
/ 100
high-risk
Severity
17/34 · Moderate
Exploitability
6/34 · Minimal
Exposure
30/34 · Critical