Description
ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.
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 | 1:4.2.8p8+dfsg-1 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | ntp | 4.2.8p8-14.1 | SUSE-SU-2016:1563-1 |
| SLES 12 | ntp | 4.2.8p8-46.8.1 | SUSE-SU-2016:1568-1 |
| SLES 11 SP4 | ntp | 4.2.8p8-14.1 | SUSE-SU-2016:1584-1 |
| SLES 11 SP3 | ntp | 4.2.8p8-47.3 | SUSE-SU-2016:1602-1 |
| SLES 11 SP2 | ntp | 4.2.8p8-47.3 | SUSE-SU-2016:1602-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | ntp | 4.2.8p8-14.1 | SUSE-SU-2016:1563-1 |
| SLES for SAP 12 | ntp | 4.2.8p8-46.8.1 | SUSE-SU-2016:1568-1 |
| SLES for SAP 11 SP4 | ntp | 4.2.8p8-14.1 | SUSE-SU-2016:1584-1 |
| SUSE OpenStack Cloud 5 | ntp | 4.2.8p8-47.3 | SUSE-SU-2016:1602-1 |
| SUSE Manager Proxy 2.1 | ntp | 4.2.8p8-47.3 | SUSE-SU-2016:1602-1 |
| SUSE Manager 2.1 | ntp | 4.2.8p8-47.3 | SUSE-SU-2016:1602-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ntp | 4.2.8p9-1.1 | openSUSE-SU-2024:10181-1 |
Advisories 6
- SUSE-SU-2016:1602-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1584-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1563-1 Security update for ntp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10181-1 ntp-4.2.8p9-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1568-1 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
References
- SUSE-SU-2016:1602 vendor-advisory
- openSUSE-SU-2016:1583 vendor-advisory
- FreeBSD-SA-16:24 vendor-advisory
- http://bugs.ntp.org/3046
- 1036037 vdb-entry
- SUSE-SU-2016:1584 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- VU#321640 third-party-advisory
- http://support.ntp.org/bin/view/Main/SecurityNotice
- openSUSE-SU-2016:1636 vendor-advisory
- http://support.ntp.org/bin/view/Main/NtpBug3046
- SUSE-SU-2016:1563 vendor-advisory
- GLSA-201607-15 vendor-advisory