vulnerability
NTP: Improper Input Validation (CVE-2016-1547)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | Jan 6, 2017 | Feb 23, 2023 | Mar 1, 2023 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
Jan 6, 2017
Added
Feb 23, 2023
Modified
Mar 1, 2023
Description
An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.
Solution
ntp-upgrade-latest
References
Rapid7 Labs
2026 Global Threat Landscape Report
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