# CVE-2023-4012

## Summary

- **CVE ID:** CVE-2023-4012
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-372
- **Published:** Aug 7, 2023
- **Last Modified:** Jun 22, 2026

## Description

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

## Affected Products

- NTPsec — ntpsec (1.2.2)

## References

- [CNA](https://gitlab.com/NTPsec/ntpsec/-/issues/794)
- [CNA](https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.23%
- **EPSS Percentile:** 45.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._