CVE-2016-5117

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Published Jan 31, 2017 CVSS 3.0 · 5.9 Medium EPSS < 1% KEV · Not listed

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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

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

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2016-6068	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

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.702% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/ntpd/constraint.c.diff?r1=1.27&r2=1.28
http://www.openntpd.org/txt/release-6.0p1.txt
http://www.openwall.com/lists/oss-security/2016/05/23/2
http://www.openwall.com/lists/oss-security/2016/05/29/6

History

No history.

Subscriptions

Openntpd Openntpd

Weaknesses

CWE-254

Sources

CVE record Updated: Aug 6, 2024, 12:53 AM

Status: PUBLISHED
Assigner: mitre
Published: Jan 31, 2017, 7:00 PM
Updated: Aug 6, 2024, 12:53 AM
Reserved: May 29, 2016, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 12:48 AM

Status: Modified
Published: Jan 31, 2017, 7:59 PM
Modified: Jun 17, 2026, 12:48 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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