ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- CVSS 3.0 Base Score: 5.9
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-ntpamazon-linux-ami-2-upgrade-ntp-debuginfoamazon-linux-ami-2-upgrade-ntp-docamazon-linux-ami-2-upgrade-ntp-perlamazon-linux-ami-2-upgrade-ntpdateamazon-linux-ami-2-upgrade-sntp | Jul 21, 2020 | Apr 17, 2020 | |
| Centos_linux | — | centos-upgrade-ntpcentos-upgrade-ntp-debuginfocentos-upgrade-ntp-doccentos-upgrade-ntp-perlcentos-upgrade-ntpdatecentos-upgrade-sntp | Jun 24, 2020 | Apr 17, 2020 |
| Debian | debian-upgrade-ntp | May 6, 2020 | Apr 17, 2020 | |
| F5 Big Ip | f5-bigip-upgrade-latest | Jun 17, 2026 | Jun 2, 2020 | |
| Gentoo Linux | gentoo-linux-upgrade-net-misc-ntp | Jul 28, 2020 | Apr 17, 2020 | |
| Huawei Euleros 2_0_sp2 | huawei-euleros-2_0_sp2-upgrade-ntphuawei-euleros-2_0_sp2-upgrade-ntpdate | Jun 17, 2020 | Apr 17, 2020 | |
| Huawei Euleros 2_0_sp5 | huawei-euleros-2_0_sp5-upgrade-ntphuawei-euleros-2_0_sp5-upgrade-ntpdatehuawei-euleros-2_0_sp5-upgrade-sntp | Sep 3, 2020 | Apr 17, 2020 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-ntphuawei-euleros-2_0_sp8-upgrade-ntpdatehuawei-euleros-2_0_sp8-upgrade-sntp | Jul 31, 2020 | Apr 17, 2020 | |
| Ibm Aix | ibm-aix-ntp_advisory13 | Oct 27, 2020 | Apr 17, 2020 | |
| Ntp | ntp-upgrade-4_3_100 | Feb 23, 2023 | Apr 17, 2020 | |
| Oracle Solaris | oracle-solaris-11-4-upgrade-service-network-ntp-4-2-8-14-11-4-24-0-1-75-1 | Jan 19, 2021 | Apr 17, 2020 | |
| Oracle_linux | — | oracle-linux-upgrade-ntporacle-linux-upgrade-ntpdateoracle-linux-upgrade-ntp-docoracle-linux-upgrade-ntp-perloracle-linux-upgrade-sntp | Jun 24, 2020 | Mar 3, 2020 |
| Redhat_linux | — | redhat-upgrade-ntpredhat-upgrade-ntp-debuginforedhat-upgrade-ntp-docredhat-upgrade-ntp-perlredhat-upgrade-ntpdateredhat-upgrade-sntp | Jun 24, 2020 | Apr 17, 2020 |
| Suse | — | suse-upgrade-ntpsuse-upgrade-ntp-doc | Jul 1, 2020 | Apr 17, 2020 |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Apr 17, 2020 |
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