CVE-2016-4957
7.5
HIGH
CVSS 3.1
EPSS 53.7%
Description
ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.
How to fix CVE-2016-4957
To remediate CVE-2016-4957, upgrade the affected package to a fixed version below.
- Debian/ntp—upgrade to 1:4.2.8p8+dfsg-1 or later
Is CVE-2016-4957 being exploited?
Likely — EPSS is 53.7%, placing CVE-2016-4957 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
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 |