Segfault on invalid SSH keys.

[Damien Miller]

On Thu, 15 Oct 2015, Steve Kemp wrote:

> > >   Via fuzzing I discovered a key which will cause 
> > >  the ssh-keygen process to segfault when fingerprinting
> > >  via:
> > > 
> > >         ssh-keygen -l -f bogus.key
> > 
> > Could you please share the key that causes this problem?
> 
>   The key was attached to the referenced bug report, but
>  please find attached a copy to this mail.
> 
>   Usage is:
> 
>     $ gunzip crash.min.pub.gz
>     $ ssh-keygen -l -f ./crash.min.pub 
>     Segmentation fault

What version of OpenSSH are you using? I don't see a crash with 7.1 or
HEAD:

[djm at laptop openssh]$ ssh-keygen -lf /tmp/crash.min.pub
line 2 too long: 4...
/tmp/crash.min.pub is not a public key file.

-d