Description
praecis_parse in ntpd/refclock_palisade.c in NTP 4.2.8p15 has an out-of-bounds write. Any attack method would be complex, e.g., with a manipulated GPS receiver.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | ntp | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | ntp | No fix yet | — |
| Ubuntu 16.04 LTS | ntp | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | ntp | No fix yet | — |
| Ubuntu Pro 18.04 LTS | ntp | No fix yet | — |
| Ubuntu Pro 14.04 LTS | ntp | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | ntp | 4.2.8p17-150000.4.25.1 | SUSE-SU-2023:2608-1 |
| SLES 15 SP4 | ntp | 4.2.8p17-150000.4.25.1 | SUSE-SU-2023:2608-1 |
| SLES 12 SP5 | ntp | 4.2.8p17-103.1 | SUSE-SU-2023:2609-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | ntp | 4.2.8p17-103.1 | SUSE-SU-2023:2609-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ntp | 4.2.8p17-1.1 | openSUSE-SU-2024:12997-1 |
| openSUSE Leap 15.5 | ntp | 4.2.8p17-150000.4.25.1 | SUSE-SU-2023:2608-1 |
| openSUSE Leap 15.4 | ntp | 4.2.8p17-150000.4.25.1 | SUSE-SU-2023:2608-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | ntp +4 | 4.2.8p15-3.amzn2.0.7 | ALAS2-2024-2396 |
Advisories 9
- SUSE-SU-2023:2608-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12997-1 ntp-4.2.8p17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-2361 Oracle Communications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 17, 2025
- WID-SEC-2023-0938 ntp: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 6, 2025
- NCSC-2025-0330 Kwetsbaarheden verholpen in Oracle Communications producten NCSC-NL (Netherlands) · Oct 23, 2025
- VDE-2024-073 Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware CERT@VDE · May 22, 2025
- SUSE-SU-2023:2609-1 Security update for ntp SUSE / openSUSE Security Updates · May 2, 2025
- NCSC-2024-0411 Kwetsbaarheden verholpen in Oracle Database producten NCSC-NL (Netherlands) · Oct 17, 2024
- ALAS2-2024-2396 Moderate: ntp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 15, 2024