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Case File

CVE-2016-1548

HIGH · CVSS 7.2 EPSS 3.84% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2017-01-06 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

External Security References

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CVE
CVE-2016-1548
Severity
HIGH
CVSS
7.2
EPSS
3.84%

Original NVD Description

An attacker can spoof a packet from a legitimate ntpd server with an origin timestamp that matches the peer->dst timestamp recorded for that server. After making this switch, the client in NTP 4.2.8p4 and earlier and NTPSec aa48d001683e5b791a743ec9c575aaf7d867a2b0c will reject all future legitimate server responses. It is possible to force the victim client to move time after the mode has been changed. ntpq gives no indication that the mode has been switched.