{"cve":"CVE-2020-13817","nvd":{"published":"2020-06-04T13:15:11.053","modified":"2026-06-17T02:53:42.760","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H","score":7.4},"cwes":["CWE-330"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html","http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html","http://support.ntp.org/bin/view/Main/NtpBug3596","https://bugs.ntp.org/show_bug.cgi?id=3596","https://security.gentoo.org/glsa/202007-12"],"products":["fujitsu:m10-1_firmware","fujitsu:m10-4_firmware","fujitsu:m10-4s_firmware","fujitsu:m12-1_firmware","fujitsu:m12-2_firmware","fujitsu:m12-2s_firmware","netapp:cloud_backup","netapp:clustered_data_ontap","netapp:data_ontap","netapp:element_software","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:hci_compute_node_firmware","netapp:hci_management_node","netapp:ontap_tools","netapp:solidfire","netapp:steelstore_cloud_integrated_storage","ntp:ntp","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:05:42.039641217+00:00"},"epss":{"cve":"CVE-2020-13817","score":0.03362,"percentile":0.88725,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}