CVE-2020-13817

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.

• CWE-330
• CWE-330

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlMailing List, Third Party Advisory
• http://support.ntp.org/bin/view/Main/NtpBug3596Vendor Advisory
• https://bugs.ntp.org/show_bug.cgi?id=3596Issue Tracking, Vendor Advisory
• https://security.gentoo.org/glsa/202007-12Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200625-0004/Third Party Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlMailing List, Third Party Advisory
• http://support.ntp.org/bin/view/Main/NtpBug3596Vendor Advisory
• https://bugs.ntp.org/show_bug.cgi?id=3596Issue Tracking, Vendor Advisory
• https://security.gentoo.org/glsa/202007-12Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200625-0004/Third Party Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory

Published

Jun 4, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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