What is the CVSS score of CVE-2016-5117?

CVE-2016-5117 has a CVSS 3.0 base score of 5.9 (Medium). CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2016-5117?

Yes, a patch is available for CVE-2016-5117. Update the affected software to the latest version immediately.

Openntpd CVE-2016-5117

MEDIUM

7PK - Security Features (CWE-254)

2017-01-31 cve@mitre.org

Authentication Bypass Openntpd

5.9

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

5.9 MEDIUM

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Jan 31, 2017 - 19:59 cve.org

MEDIUM 5.9

DescriptionCVE.org

AnalysisAI

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. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required.

Technical ContextAI

This vulnerability is classified under CWE-254. 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 include: Openntpd. Version information: before 6.0.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.