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Vulnerability record · CVE-2020-15025 · published 24 June 2020

CVE-2020-15025: Ntp memory leak vulnerability

Ntp · Ntp

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.

4.9 CVSS 3.1 Medium EPSS 3.4% · top 11.7% CWE-401 · Memory leak
4.9CVSS 3.1 base score, v2 4.0
3.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
16Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

16 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html Mailing ListThird Party Advisory
https://bugs.gentoo.org/729458 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202007-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200702-0002/ Third Party Advisory
https://support.ntp.org/bin/view/Main/NtpBug3661 Vendor Advisory
https://support.ntp.org/bin/view/Main/SecurityNotice#June_2020_ntp_4_2_8p15_NTP_Relea Release NotesVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html PatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html Mailing ListThird Party Advisory
https://bugs.gentoo.org/729458 Issue TrackingThird Party Advisory
https://security.gentoo.org/glsa/202007-12 Third Party Advisory
https://security.netapp.com/advisory/ntap-20200702-0002/ Third Party Advisory
https://support.ntp.org/bin/view/Main/NtpBug3661 Vendor Advisory
https://support.ntp.org/bin/view/Main/SecurityNotice#June_2020_ntp_4_2_8p15_NTP_Relea Release NotesVendor Advisory
https://www.oracle.com/security-alerts/cpujan2021.html PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-15025), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.