Skip to main content
No exploitation reportedFix available

CVE-2023-4012

No exploitation reported by the sources we read.

  • Published2023-08-07
  • WeaknessCWE-372

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC
  1. 2023-08-0718:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 15:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-4012?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-4012?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Ntpsec
BranchAffectedFixed in
1.2= 1.2.2no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitLab, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • ntpsecother versions: not affected
    Affected
    • = 1.2.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-06-21

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • ntpsecUbuntu:22.04:LTSall versions · no fixed version listed
  • ntpsecUbuntu:20.04:LTSall versions · no fixed version listed
  • ntpsecUbuntu:18.04:LTSall versions · no fixed version listed
  • ntpsecDebian:14all versions · fixed in 1.2.2+dfsg1-2
  • ntpsecDebian:13all versions · fixed in 1.2.2+dfsg1-2
  • ntpsecDebian:12all versions · fixed in 1.2.2+dfsg1-1+deb12u1
  • ntpsecCleanStartall versions · fixed in 1.2.2a-r0
  • ntpsecAlpine:v3.24all versions · fixed in 1.2.2a-r0

6 more package ranges on OSV.dev

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2023-08-07
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-777h-w3h9-x4qv

Frequently asked questions

What is CVE-2023-4012?

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

Is CVE-2023-4012 actively exploited?

Active exploitation of CVE-2023-4012 has not been confirmed. Its EPSS score was 0.5% on 2026-11-03, the estimated probability of exploitation in the next 30 days.

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

CVE-2023-4012 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running ntpsec? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, October 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record