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Looks like Focal (20.04) isn't on an affected version. Jammy (22.04) looks like it is.

My procrastination pays off ...

As do theirs ;)

What about, uh, 18.04?

Edit: 18.04 Bionic is unaffected, the ssh version is 7.6 which is too old.

If you have extended support: Just update (if it's not so old that it's not even affected in the first place)

If you don't have extended support: You're vulnerable to worse, easier to exploit bugs :)

I can confirm this 18.04 machine still gets some important updates like kernel upgrades and patched versions of Apache.

I have a single 18.04 machine that is stuck on that, because it has 18.04 386, and as 20.04 doesn't support 386 anymore, apparently there is not a simple upgrade path to 20.04 64-bit (without doing extensive surgery). Very annoying...

On 22.04 apt update && upgrade doesn't help.. yet?

Just ran an apt update and upgrade on my Debian 12 server. OpenSSH packages were the only ones upgraded.

Yes, the Debian 12 fix is out. You can verify you're patched by running 'ssh -V' and verifying you see 'deb12u3'. If you see 'deb12u2' then you're vulnerable [1].

[1] https://security-tracker.debian.org/tracker/CVE-2024-6387

Can confirm, Pi OS bullseye also has the updated openssh.