CVE-2018-8956: n/a vulnerability

CVE-2018-8956: ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client...

ntpd in ntp 4.2.8p10, 4.2.8p11, 4.2.8p12 and 4.2.8p13 allow remote attackers to prevent a broadcast client from synchronizing its clock with a broadcast NTP server via soofed mode 3 and mode 5 packets. The attacker must either be a part of the same broadcast network or control a slave in that broadcast network that can capture certain required packets on the attacker's behalf and send them to the attacker.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 07:10 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can let a nearby network attacker stop affected NTP broadcast clients from syncing time. It is not described as remote code execution or data theft, but bad time can disrupt logs, authentication, certificates, and monitoring. Exposure is most likely where ntpd broadcast client mode is used on shared or insufficiently trusted broadcast networks. The bundle names NTP versions only; downstream exposure should be checked against vendor advisories such as NetApp and openSUSE. Treat this as a targeted operational resilience issue. Prioritize environments where accurate time supports authentication, compliance logging, certificates, trading, industrial control, or incident response. Mitigation focus: Check vendor advisories for supported NTP package updates or product-specific guidance.; Upgrade or replace affected ntpd 4.2.8p10 through 4.2.8p13 deployments where applicable.; Disable NTP broadcast client mode where it is not operationally required..

Prepared: Jun 5, 2026, 14:59 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 6, 2020, 18:03 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://tools.ietf.org/html/rfc5905CVE reference · x_refsource_MISC
https://nikhiltripathi.in/NTP_attack.pdfCVE reference · x_refsource_MISC
https://arxiv.org/abs/2005.01783CVE reference · x_refsource_MISC
https://security.netapp.com/advisory/ntap-20200518-0006/CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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