CVE-2016-2516 is a denial-of-service vulnerability affecting NTP versions before 4.2.8p7 and 4.3.x before 4.3.92, specifically when mode7 is enabled. An authenticated remote attacker can trigger an ntpd abort by repeatedly using the same IP address within an unconfig directive. This vulnerability has a CVSS score of 5.3 (Medium), indicating a network-based attack with high impact on availability and high attack complexity. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage are minimal, suggesting low current attention.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.2.8CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:*:p6:*:*:*:*:*:* | ||
4.3.25CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.3.25:*:*:*:*:*:*:* | ||
4.3.26CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.3.26:*:*:*:*:*:*:* | ||
4.3.27CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.3.27:*:*:*:*:*:*:* | ||
4.3.28CPE matchmatch criteria | cpe:2.3:a:ntp:ntp:4.3.28:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:H/PR:L/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, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.