CVE-2025-58066 – ntpd-rs

Package

Manager: cargo
Name: ntpd-rs
Vulnerable Version: >=1.2.0 <1.6.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00051 pctl0.15524

Details

DoS Vulnerability in ntpd-rs # Summary A denial of service vulnerability was discovered in ntpd-rs where an attacker can induce a message storm between two NTP servers running ntpd-rs. # Details Since ntpd-rs version 1.2.0, when configured as a server, incorrectly responded to all NTP messages sent to the server's port with a time reply, including to responses from other servers. As a consequence, a message with a spoofed IP address of another server could cause two servers running ntpd-rs to continually respond to each other, consuming significant amounts of resources. # Impact Any time server running ntpd-rs with version between 1.2.0 and 1.6.1 inclusive which allows non-NTS traffic is affected. Client-only configurations are not affected. Affected users are recommended to upgrade to version 1.6.2 as soon as possible. # Workarounds Should upgrading not be possible, the impact of the issue can be mitigated by: - Whitelisting access to only IP addresses of clients using the server, using the ignore filter method. - Blocking incoming non-request traffic on the NTP server port using a firewall. - Disabling public access to the vulnerable NTP server - Disabling the server functionality by removing any [server] sections from the configuration. # Acknowledgements The ntpd-rs authors thank Eric Sesterhenn from X41 D-Sec GmbH for finding and reporting this issue.

Metadata

Created: 2025-08-29T20:07:27Z
Modified: 2025-08-29T21:58:17Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-4855-q42w-5vr4/GHSA-4855-q42w-5vr4.json
CWE IDs: ["CWE-406"]
Alternative ID: GHSA-4855-q42w-5vr4
Finding: F002
Auto approve: 1