The xz sshd backdoor rabbithole goes quite a bit deeper 2 years ago
https://www.openwall.com/lists/oss-security/2024/03/29/4
> == Observing Impact on openssh server ==
>
> With the backdoored liblzma installed, logins via ssh become a lot slower.
>
> time ssh nonexistant@...alhost
>
> before:
> nonexistant@...alhost: Permission denied (publickey).
>
> before:
> real 0m0.299s
> user 0m0.202s
> sys 0m0.006s
>
> after:
> nonexistant@...alhost: Permission denied (publickey).
>
> real 0m0.807s
> user 0m0.202s
> sys 0m0.006s