An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.
CVSS Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Centos_linux | — | centos-upgrade-ntpcentos-upgrade-ntp-doccentos-upgrade-ntp-perlcentos-upgrade-ntpdatecentos-upgrade-sntp | May 31, 2016 | May 31, 2016 |
| Cisco Apic | cisco-apic-update-latest | May 11, 2026 | Apr 28, 2016 | |
| Debian | debian-upgrade-ntp | Jul 27, 2016 | Jul 25, 2016 | |
| F5 Big Ip | f5-bigip-upgrade-latest | Jun 17, 2026 | May 25, 2016 | |
| Freebsd | freebsd-upgrade-package-ntpfreebsd-upgrade-package-ntp-develfreebsd-upgrade-base-10_3-release-p1freebsd-upgrade-base-10_2-release-p15freebsd-upgrade-base-10_1-release-p32freebsd-upgrade-base-9_3-release-p40 | Dec 10, 2025 | Apr 27, 2016 | |
| Gentoo Linux | gentoo-linux-upgrade-net-misc-ntp | Oct 30, 2017 | Jan 6, 2017 | |
| Ibm Aix | ibm-aix-ntp_advisory7 | Nov 30, 2017 | Jan 6, 2017 | |
| Ntp | ntp-upgrade-latest | Feb 23, 2023 | Jan 6, 2017 | |
| Oracle Solaris | oracle-solaris-11-3-upgrade-service-network-ntp-4-2-8-8-0-175-3-12-0-1-0 | May 29, 2017 | Jan 6, 2017 | |
| Oracle_linux | — | oracle-linux-upgrade-ntporacle-linux-upgrade-ntpdateoracle-linux-upgrade-ntp-docoracle-linux-upgrade-ntp-perloracle-linux-upgrade-sntp | Jan 6, 2017 | Jan 6, 2017 |
| Redhat_linux | — | redhat-upgrade-ntpredhat-upgrade-ntp-debuginforedhat-upgrade-ntp-docredhat-upgrade-ntp-perlredhat-upgrade-ntpdateredhat-upgrade-sntp | Aug 3, 2016 | Aug 3, 2016 |
| Suse | — | suse-upgrade-ntpsuse-upgrade-ntp-doc | May 11, 2016 | May 11, 2016 |
| Ubuntu | ubuntu-upgrade-ntp | Oct 7, 2016 | Oct 5, 2016 |
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