Where locked accounts were treated as password-less accounts, and would allow direct ssh access.
In Debian's defence, this was caught in the unstable distro and never made it out to a stable release.
Though I think I heard some criticism of what counts and what does not for that tally, maybe 20 years ago.
The project was fairly innovative of including now-standard practices like having the daemon drop its privileges.
Very unfair of OpenBSD (and other security conscious OSes) to not compete on equal terms there.
It was a relatively recent exploit, I remember being at an RSA conference when the remote ssh exploit was announced and everyone’s pager started going off and people hustled out of there. Fun times!
Be very, very concerned with any vulnerabilities that cause crashes. Someone may discover a way to control where the process points to, and now you have a way more serious issue.
That would be a huge problem.
I don’t care about DoS or crashes!