CVE-2023-4012
Publication date 7 August 2023
Last updated 26 August 2025
Ubuntu priority
Description
ntpd will crash if the server is not NTS-enabled (no certificate) and it receives an NTS-enabled client request (mode 3).
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ntpsec | ||
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy | Ignored changes too intrusive | |
| 20.04 LTS focal | Ignored changes too intrusive | |
| 18.04 LTS bionic | Ignored too intrusive | |
| 16.04 LTS xenial | Ignored end of standard support | |
| 14.04 LTS trusty | Ignored end of standard support |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.5 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |