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CVE Record

CVE-2016-1549: A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock...

A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw lets a malicious authenticated NTP peer influence a victim system’s clock by creating many temporary associations. Business impact depends on where NTP is used: incorrect time can disrupt logging, authentication, certificates, scheduled jobs, and investigations. The provided sources do not give CVSS severity or active exploitation evidence. Exposure is most likely on legacy systems running NTP 4.2.8p4 or earlier, or the listed NTPsec commits, with authenticated peer relationships configured. Appliances and operating systems may inherit exposure through bundled NTP packages, as reflected by multiple vendor advisories. Treat as a targeted infrastructure integrity risk, not a broad internet worm risk. Prioritize systems where time accuracy supports authentication, auditability, certificates, billing, or safety-sensitive operations. Patch through vendor channels after confirming exposure. Mitigation focus: Inventory NTP and NTPsec versions across servers, appliances, and network devices.; Check NTP Project, NTPsec, and affected vendor advisories for fixed packages.; Upgrade legacy NTP packages through supported operating system or appliance channels..

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

Potential ATT&CK relevance

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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
6Source links

CVSS and timeline data

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
NTP ProjectNTP4.2.8p3, 4.2.8p4Listed
NTPsec ProjectNTPSec3e160db8dc248a0bcb053b56a80167dc742d2b74, a5fb34b9cc89b92a8fef2f459004865c93bb7f92Listed
Weakness

CWE details

No CWE listed

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