VULNERABILITY INTELLIGENCE

CVE-2016-5117

CVSS score5.9 MEDIUM
EPSS probability0.70%
CISA KEVNot currently listed
Published2017-01-31
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Description

OpenNTPD before 6.0p1 does not validate the CN for HTTPS constraint requests, which allows remote attackers to bypass the man-in-the-middle mitigations via a crafted timestamp constraint with a valid certificate.

Primary references