Description
ntpd-rs is a full-featured implementation of the Network Time Protocol. Prior to 1.7.1, an attacker can remotely induce moderate increases (2-4 times above normal) in cpu usage. When having NTS enabled on an ntpd-rs server, an attacker can create malformed NTS packets that take significantly more effort for the server to respond to by requesting a large number of cookies. This can lead to degraded server performance even when a server could otherwise handle the load. This vulnerability is fixed in 1.7.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| pendulum-project | ntpd-rs | < 1.7.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | rust-ntp-proto | 1.7.1-1 | — |
| Debian 13 | rust-ntp-proto | 1.4.0-4+deb13u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | rust-ntpd | No fix yet | — |
| Ubuntu 26.04 LTS | rust-ntpd | No fix yet | — |
| Ubuntu 25.10 | rust-ntpd | No fix yet | — |
| Ubuntu 24.04 LTS | rust-ntpd | No fix yet | — |