How can I install SSH server version 5.3

Question

I need to pentest the vulnerability of the "SSH Server v5.3" The problem is that Ubuntu comes with the SSH Server version 7 and I don’t know how to remove the current one.

Probably: apt remove ssh-server —purge

But how can I apt install ssh-server 5.3?

Is there anyway searching in old apt repo for 5.3 version?

Thanks!

Download the tar ball from https://www.openssh.com/portable.html, then refer to the linked question. — David Foerster, Sep 30 '17 at 00:16
I don't think questions about installing specific software that has to be compiled from source should be closed against that question, since it's often quite nontrivial to adapt the generic procedure (@DavidFoerster). I think these questions are answerable and should be answered — Zanna, Oct 01 '17 at 19:33
@Zanna: Agreed, but let's assume that it is trivial until OP finds out that it's not, at which point they hopefully [edit] their question and we can reopen (and answer) it. — David Foerster, Oct 02 '17 at 06:51
Even your recommendation with an explanation of why portable OpenSSH is suitable for this purpose would be a good answer @DavidFoerster imho — Zanna, Oct 02 '17 at 07:54

score 1 · Answer 1 · answered Oct 02 '17 at 08:43

You can build and install a “portable” version of OpenSSH from source:

Download the tar ball for the desired version from one of the mirrors sites listed on https://openssh.com/portable.html.
OpenSSH installation follows the common procedure lined out in “How do I install a .tar.gz (or .tar.bz2) file?”:
```
tar -xf [TARBALL]
cd [EXTRACTED-PATH]
./configure [options...]
make
make install  # Use 'sudo' if you want to install for all users.
```
In this particular case you may want to set an installation prefix to avoid the replacement or shadowing of the regular OpenSSH installation:
```
./configure --prefix=[PREFIX]
```
Suitable PREFIX paths might be somthing like ~/openssh-5.3 or /opt/openssh-5.3.
If you run into issue refer to the included installation instructions, typically in a files called INSTALL or BUILDING. You can also find it at http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/INSTALL.
- The most likely issue are missing library dependencies.
If you can't solve the issue using the resources mentioned above you're welcome to edit your question and leave a comment below this answer to draw my attention to your changes.

How can I install SSH server version 5.3

1 Answers1