Memory leak in the CRYPTO_ASSOC 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 (memory consumption).
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)
Covered by Rapid7
| 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 |
| Debian | — | Upgrade ntp | Nov 9, 2015 | Oct 27, 2015 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Nov 6, 2015 |
| Freebsd | — | Upgrade ntpUpgrade ntp-develUpgrade FreeBSD | Dec 10, 2025 | Oct 21, 2015 |
| Gentoo Linux | — | Upgrade net-misc/ntp. | Oct 30, 2017 | Aug 7, 2017 |
| Huawei Euleros 2_0_sp1 | — | Upgrade ntpdateUpgrade ntp | Nov 30, 2017 | Aug 7, 2017 |
| Ibm Aix | — | Apply the fix or workaround for ntp_advisory4 | Nov 30, 2017 | Aug 7, 2017 |
| Ntp | — | Upgrade NTP to version 4.3.77Upgrade NTP to version 4.2.8 | 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 |
| Oracle_linux | — | Upgrade ntp-docUpgrade ntpdateUpgrade ntp-perlUpgrade sntpUpgrade ntp | Aug 7, 2017 | Aug 7, 2017 |
| Redhat_linux | — | Upgrade ntp-docNo solution existsUpgrade ntpdateUpgrade ntp-perlUpgrade sntpUpgrade ntp-debuginfoUpgrade ntp | Jul 1, 2017 | Oct 27, 2015 |
| Suse | — | Upgrade yast2-ntp-client-devel-docUpgrade ntpUpgrade ntp-debugsourceUpgrade yast2-ntp-clientUpgrade ntp-docUpgrade ntp-debuginfo | Dec 18, 2015 | Oct 27, 2015 |
| Ubuntu | — | Upgrade ntp | Nov 9, 2015 | Oct 27, 2015 |
Prioritise with Active Threat Intelligence
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