A daily ISO of Debian testing
or Ubuntu 24.04 (noble
) beta from prior to the first week of April would be easiest, but those aren’t archived anywhere that I know of. It didn’t make it in to any stable releases of any Debian-based distros.
But even when you have a vulnerable system running sshd in a vulnerable configuration, you can’t fully demo the backdoor because it requires the attacker to authenticate with their private key (which has not been revealed).
But, if you just want to run it and observe the sshd slowness that caused the backdoor to be discovered, here are instructions for installing the vulnerable liblzma deb from snapshot.debian.org.
Fun :)
Btw, instead of installing individual vulnerable debs as those kali instructions I linked to earlier suggest, you could also point debootstrap at the snapshot service so that you get a complete system with everything as it would’ve been in late March and then run that in a VM… or in a container. You can find various instructions for creating containers and VMs using debootstrap (eg, this one which tells you how to run a container with
systemd-nspawn
; but you could also do it with podman or docker or lxc). When the instructions tell you to rundebootstrap
, you just want to specify a snapshot URL likehttps://snapshot.debian.org/archive/debian/20240325T212344Z/
in place of the usual Debian repository url (typicallyhttps://deb.debian.org/debian/
).