What is CVE-2016-5117?

CVE-2016-5117 is a medium-severity vulnerability in Openntpd, classified under CWE-254. CVSS score: 5.9/10. Published 2017-01-31.

How severe is CVE-2016-5117?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Openntpd

CVE-2016-5117

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.

EPSS: 0.007 (49.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Openntpd
N/a — versions n/a

Weakness classification (CWE)

CWE-254

References

cve@mitre.org (x_refsource_CONFIRM, Patch)
cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2016-5117?: CVE-2016-5117 is a medium-severity vulnerability in Openntpd, classified under CWE-254. CVSS score: 5.9/10. Published 2017-01-31.
How severe is CVE-2016-5117?: Medium severity. CVSS v3 base score is 5.9 out of 10.