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VULNERABILITIES

CVE-2016-5117 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=1.27&r2=1.28 CVEPatch
http://www.openntpd.org/txt/release-6.0p1.txt CVEVendor Advisory
http://www.openwall.com/lists/oss-security/2016/05/23/2 CVEMailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/05/29/6 CVEMailing ListThird Party Advisory
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=1.27&r2=1.28 [email protected]Patch

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-2547PK - Security Features[email protected]

Affected Products

ProductVersions
openntpd openntpd
<= 6.0

CPE

  • cpe:2.3:a:openntpd:openntpd:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2016-5117
NVD Published Date:
Jan 31, 2017
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]