CVE-2016-4956 is a denial-of-service vulnerability affecting NTP 4.x before version 4.2.8p8, specifically impacting products from Novell, openSUSE, Oracle, Siemens, and SUSE. This medium-severity flaw (CVSS 5.3) allows an unauthenticated remote attacker to disrupt time synchronization via a spoofed broadcast packet, leading to an interleaved-mode transition and time change. While no public exploit code or Metasploit modules are available, the vulnerability has received some community discussion and media coverage, indicating awareness. There is no evidence of active exploitation, and it is not listed on the CISA KEV catalog.
| 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:L
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.