CVE-2016-4955
5.9
MEDIUM
CVSS 3.1
EPSS 1.7%
Description
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
How to fix CVE-2016-4955
To remediate CVE-2016-4955, upgrade the affected package to a fixed version below.
- Debian/ntp—upgrade to 1:4.2.8p8+dfsg-1 or later
Is CVE-2016-4955 being exploited?
Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1:4.2.8p8+dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |