// For flags

CVE-2023-4012

Incomplete Internal State Distinction in ntpsec

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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

It was discovered that ntpd in ntpsec, a secure, hardened, and improved implementation derived from the original NTP project, could crash if NTS is disabled and an NTS-enabled client request (mode 3) is received.

*Credits: R.L. Nicholas
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-07-31 CVE Reserved
  • 2023-08-04 CVE Published
  • 2024-08-30 CVE Updated
  • 2025-06-14 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-372: Incomplete Internal State Distinction
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Ntpsec
Search vendor "Ntpsec"
 Ntpsec
Search vendor "Ntpsec" for product "Ntpsec"
 1.2.2
Search vendor "Ntpsec" for product "Ntpsec" and version "1.2.2"
-
Affected