CVE-2020-11868

HIGH

ntp < 4.2.8p14 and 4.3.x < 4.3.100 - Unauthenticated Denial of Service via Spoofed Server Mode Packet

Title source: llm
STIX 2.1

Description

ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.

References (8)

Core 8
Core References
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2020/05/msg00004.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html
Mailing List, Third Party Advisory vendor-advisory x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202007-12
Patch, Third Party Advisory x_refsource_misc
https://www.oracle.com//security-alerts/cpujul2021.html
Patch, Vendor Advisory x_refsource_misc
http://support.ntp.org/bin/view/Main/NtpBug3592
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1716665
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20200424-0002/

Scores

CVSS v3 7.5
EPSS 0.0177
EPSS Percentile 82.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-346
Status published
Products (19)
debian/debian_linux 8.0
netapp/all_flash_fabric-attached_storage_8300_firmware
netapp/all_flash_fabric-attached_storage_8700_firmware
netapp/all_flash_fabric-attached_storage_a400_firmware
netapp/clustered_data_ontap
netapp/data_ontap
netapp/fabric-attached_storage_8300_firmware
netapp/fabric-attached_storage_8700_firmware
netapp/fabric-attached_storage_a400_firmware
netapp/hci_management_node
... and 9 more
Published Apr 17, 2020
Tracked Since Feb 18, 2026