CVE-2020-11868

ntp: DoS on client ntpd using server mode packet

Published Apr 17, 2020 CVSS 3.1 · 7.5 High EPSS 2.1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2201-1 ntp security update
EUVD EUVD EUVD-2020-4208 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 5, 2025, 5:08 PM
Reserved
Apr 17, 2020, 12:00 AM
Status
Modified
Published
Apr 17, 2020, 4:15 AM
Modified
Jun 17, 2026, 2:50 AM
Severity
Low
Public date
Mar 3, 2020, 12:00 AM