🛡️ CVE-2023-4012 — ntpsec

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-372 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2023-4012 is recorded against 1 package.

  • ntpsec

Timeline and source

Published on 7 August 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

bugs.debian.org
gitlab.com
bugs.debian.org
gitlab.com

CVE-2023-4012 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-372
Public Exploit ✅ No
Source NVD
Published 2023-08-07
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
ntpsec — —

References

Issue Tracking, Third Party Advisory https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422
Issue Tracking, Vendor Advisory https://gitlab.com/NTPsec/ntpsec/-/issues/794
Issue Tracking, Third Party Advisory https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1038422
Issue Tracking, Vendor Advisory https://gitlab.com/NTPsec/ntpsec/-/issues/794

Site Security Check

Is ntpsec part of your stack?

CVE-2023-4012 is rated CVSS 7.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.