Description
ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with a broadcast NTP server via soofed mode 3 and mode 5 packets. The attacker must either be a part of the same broadcast network or control a slave in that broadcast network that can capture certain required packets on the attacker's behalf and send them to the attacker.
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 | 1:4.2.8p14+dfsg-1 | — |
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 SP2 | ntp | 4.2.8p15-4.10.1 | SUSE-SU-2020:1823-1 |
| SLES 15 SP1 | ntp | 4.2.8p15-4.10.1 | SUSE-SU-2020:1823-1 |
| SLES 15 | ntp | 4.2.8p15-4.10.1 | SUSE-SU-2020:1823-1 |
| SLES 12 SP5 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES 12 SP4 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES 12 SP2 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES 11 SP4 | ntp | 4.2.8p15-64.16.1 | SUSE-SU-2020:14415-1 |
| SLES for SAP 15 | ntp | 4.2.8p15-4.10.1 | SUSE-SU-2020:1823-1 |
| SLES for SAP 12 SP5 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES for SAP 12 SP4 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES for SAP 12 SP3 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SLES for SAP 12 SP2 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SUSE OpenStack Cloud Crowbar 8 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SUSE OpenStack Cloud 8 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SUSE OpenStack Cloud 7 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SUSE HPE Helion OpenStack 8 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
| SUSE Enterprise Storage 5 | ntp | 4.2.8p15-88.1 | SUSE-SU-2020:1805-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ntp | 4.2.8p15-7.2 | openSUSE-SU-2024:11102-1 |
| openSUSE Leap 15.2 | ntp | 4.2.8p15-lp152.3.3.1 | openSUSE-SU-2020:1007-1 |
| openSUSE Leap 15.1 | ntp | 4.2.8p15-lp151.2.3.1 | openSUSE-SU-2020:0934-1 |
Advisories 7
- openSUSE-SU-2020:0934-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11102-1 ntp-4.2.8p15-7.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1805-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1823-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1007-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:14415-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2022-032 AUMA: Multiple Vulnerabilities in Automation Runtime NTP Service CERT@VDE · Aug 9, 2022