CVE-2016-1547
5.3
MEDIUM
CVSS 3.1
EPSS 3.7%
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.
How to fix CVE-2016-1547
To remediate CVE-2016-1547, upgrade the affected package to a fixed version below.
- Debian/ntp—upgrade to 1:4.2.8p7+dfsg-1 or later
Is CVE-2016-1547 being exploited?
Low — EPSS is 3.7%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:4.2.8p7+dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |