CVE-2016-4954
7.5
HIGH
CVSS 3.1
EPSS 3.9%
Description
The process_packet function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication.
How to fix CVE-2016-4954
To remediate CVE-2016-4954, upgrade the affected package to a fixed version below.
- Debian/ntp—upgrade to 1:4.2.8p8+dfsg-1 or later
Is CVE-2016-4954 being exploited?
Low — EPSS is 3.9%, 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 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |