The decodenetnum function in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service (assertion failure) via a 6 or mode 7 packet containing a long data value.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Aix 5.3.12 Ntp_advisory4 | — | — | Feb 4, 2016 | Feb 4, 2016 |
| Aix 6.1.6 Ntp_advisory4 | — | — | Nov 3, 2017 | Aug 7, 2017 |
| Aix 6.1.9 Ntp_advisory4 | — | — | Feb 4, 2016 | Feb 4, 2016 |
| Aix 7.1.0 Ntp_advisory4 | — | — | Nov 3, 2017 | Aug 7, 2017 |
| Aix 7.1.3 Ntp_advisory4 | — | — | Feb 4, 2016 | Feb 4, 2016 |
| Aix 7.1.4 Ntp_advisory4 | — | — | Feb 4, 2016 | Feb 4, 2016 |
| Aix 7.2.0 Ntp_advisory4 | — | — | Feb 4, 2016 | Feb 4, 2016 |
| Cisco Apic | — | Upgrade to the latest version of Cisco APIC to resolve this vulnerability. | May 11, 2026 | Oct 21, 2015 |
| Cisco Ise | — | — | Oct 21, 2025 | Oct 21, 2015 |
| Cisco Xe | — | Upgrade to the latest version of Cisco IOS XE | Jul 30, 2019 | Aug 7, 2017 |
| Debian | — | Upgrade ntp | Nov 9, 2015 | Oct 27, 2015 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Nov 10, 2015 |
| Freebsd | — | Upgrade ntpUpgrade FreeBSDUpgrade ntp-devel | Dec 10, 2025 | Oct 21, 2015 |
| Gentoo Linux | — | Upgrade net-misc/ntp. | Oct 30, 2017 | Aug 7, 2017 |
| Huawei Euleros 2_0_sp2 | — | Upgrade ntpdateUpgrade ntp | Jul 23, 2019 | Aug 7, 2017 |
| Huawei Euleros 2_0_sp3 | — | Upgrade ntpdateUpgrade sntpUpgrade ntp | Sep 25, 2019 | Aug 7, 2017 |
| Ibm Aix | — | Apply the fix or workaround for ntp_advisory4 | Nov 30, 2017 | Aug 7, 2017 |
| Ntp | — | Upgrade NTP to version 4.2.8Upgrade NTP to version 4.3.77 | Feb 23, 2023 | Aug 7, 2017 |
| Oracle Solaris | — | Upgrade service/network/ntp to version 4.2.8.6-0.175.3.6.0.1.0 on Solaris 11.3 | May 29, 2017 | May 29, 2017 |
| Suse | — | Upgrade ntp-debugsourceUpgrade ntp-docUpgrade ntp-debuginfoUpgrade yast2-ntp-client-devel-docUpgrade yast2-ntp-clientUpgrade ntp | Dec 18, 2015 | Oct 27, 2015 |
| Ubuntu | — | Upgrade ntp | Nov 9, 2015 | Oct 27, 2015 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub