CVE-2016-5117

MEDIUM

Openntpd < 6.0 - Security Feature Bypass

Title source: rule

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.

References (4)

Scores

CVSS v3 5.9
EPSS 0.0027
EPSS Percentile 50.2%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Classification

CWE
CWE-254
Status published

Affected Products (2)

openntpd/openntpd < 6.0
n/a/n/a

Timeline

Published Jan 31, 2017
Tracked Since Feb 18, 2026