CVE-2020-11868

HIGHScheduled

Published:Apr 17, 2020(6 years ago)

Modified:May 5, 2025

Remote ExploitNo Auth RequiredNo InteractionLow Complexity

Vulnerability 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.

Attack Characteristics

Network AccessLow ComplexityNo Auth NeededNo User Interaction

🤖

AI analysis not yet available

Plain-English explanation, risk summary, and remediation steps will appear here once AI analysis is complete.

No Fix Known

No patch has been released yet. Apply workarounds or mitigations where available.

Affected Software

Vendor	Product	Versions	Fixed In
ntp	ntp	-	-
ntp	ntp	-	-
ntp	ntp	-

Timeline

Published
CVE disclosed publicly
Apr 17, 20206 years ago
Last Modified
Most recent update
May 5, 20251 year ago
Indexed to CVEInsight
Added to this platform
Mar 29, 20261 month ago

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005....Mailing List
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044....Mailing List
http://support.ntp.org/bin/view/Main/NtpBug3592Patch

CVSS Score

v3.1

7.5/ 10.0

HIGH

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

At a Glance

Affected Products

References

ntp / ntp +46 more

https://bugzilla.redhat.com/show_bug.cgi?id=1716665Issue Tracking

https://lists.debian.org/debian-lts-announce/2020/05/msg00004.htmlMailing List

https://security.gentoo.org/glsa/202007-12Third Party Advisory

https://security.netapp.com/advisory/ntap-20200424-0002/Third Party Advisory

https://www.oracle.com//security-alerts/cpujul2021.htmlPatch

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005....Mailing List

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044....Mailing List

http://support.ntp.org/bin/view/Main/NtpBug3592Patch

https://bugzilla.redhat.com/show_bug.cgi?id=1716665Issue Tracking

https://lists.debian.org/debian-lts-announce/2020/05/msg00004.htmlMailing List

https://security.gentoo.org/glsa/202007-12Third Party Advisory

https://security.netapp.com/advisory/ntap-20200424-0002/Third Party Advisory

https://www.oracle.com//security-alerts/cpujul2021.htmlPatch

CVSS v3 Vector

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

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

Impact Analysis

ConfidentialityNone

NoneLowHigh

IntegrityNone

NoneLowHigh

AvailabilityHigh

NoneLowHigh

CVE-2020-11868

✦ Vulnerability Description

Attack Characteristics

Affected Software

Timeline

References

CVSS Score

At a Glance

Official Sources

CVSS v3 Vector

Impact Analysis

Vulnerability Description