{"id":"UBUNTU-CVE-2020-15025","details":"ntpd in ntp 4.2.8 before 4.2.8p15 and 4.3.x before 4.3.101 allows remote attackers to cause a denial of service (memory consumption) by sending packets, because memory is not freed in situations where a CMAC key is used and associated with a CMAC algorithm in the ntp.keys file.","modified":"2026-02-04T02:18:17.095742Z","published":"2020-06-24T19:15:00Z","withdrawn":"2025-10-07T04:47:32Z","related":["USN-5175-1"],"upstream":["CVE-2020-15025"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-15025"},{"type":"REPORT","url":"https://support.ntp.org/bin/view/Main/NtpBug3661"},{"type":"REPORT","url":"https://support.ntp.org/bin/view/Main/SecurityNotice#June_2020_ntp_4_2_8p15_NTP_Relea"},{"type":"REPORT","url":"https://bugs.ntp.org/show_bug.cgi?id=3661"},{"type":"REPORT","url":"https://bugs.gentoo.org/729458"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5175-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-15025"}],"affected":[{"package":{"name":"ntp","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/ntp@1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1"}]}],"versions":["1:4.2.8p12+dfsg-3ubuntu2","1:4.2.8p12+dfsg-3ubuntu3","1:4.2.8p12+dfsg-3ubuntu4","1:4.2.8p12+dfsg-3ubuntu4.20.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"ntp","binary_version":"1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1"},{"binary_name":"ntpdate","binary_version":"1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1"},{"binary_name":"sntp","binary_version":"1:4.2.8p12+dfsg-3ubuntu4.20.04.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-15025.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}