CVE-2023-4012

HIGHNVD 7.57.5—

7.5

ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 42.8%
KEV: Not listed

Published

August 7, 2023

Last Modified

November 21, 2024

References (4)

cve@gitlabhttps://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422
cve@gitlabhttps://gitlab.com/NTPsec/ntpsec/-/issues/794
af854a3a-2127-422b-91ae-364da2661108https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422
af854a3a-2127-422b-91ae-364da2661108https://gitlab.com/NTPsec/ntpsec/-/issues/794

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-372

Data Freshness Timeline

(refreshed 13× in last 7d / 15× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:43 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-26 07:18 UTCepss_batch
2026-05-24 20:00 UTCEG score recompute
2026-05-24 20:00 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2023-4012?

CVE-2023-4012 is a high vulnerability published on August 7, 2023. ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).

When was CVE-2023-4012 disclosed?

CVE-2023-4012 was first published in the National Vulnerability Database on August 7, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-4012 actively exploited?

CVE-2023-4012 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 42.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-4012?

CVE-2023-4012 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2023-4012?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-4012, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-4012

📅 Published

🔄 Last Modified

🔗 References (4)