CVE-2016-4953 describes a denial-of-service vulnerability in NTP 4.x before version 4.2.8p8, affecting products from vendors like openSUSE, Oracle, and Siemens. An unauthenticated remote attacker can exploit this flaw by sending a crafted crypto-NAK packet with incorrect authentication data, leading to ephemeral-association demobilization. This vulnerability carries a high CVSS score of 7.5, indicating a severe impact on availability with low attack complexity. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage, highlighting its potential risk.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 4.2.0, < 4.2.8CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* | ||
>= 4.3.0, < 4.3.93CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:*:*:*:*:*:*:*:* | ||
4.2.8CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.8:-:*:*:*:*:*:* | ||
4.2.8CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.8:p1:*:*:*:*:*:* | ||
4.2.8CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.2.8:p1-beta1:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.