https://bugzilla.mindrot.org/show_bug.cgi?id=3558
Bug ID: 3558
Summary: Spelling "yes" as "Yes" in sshd_config has a fatal
result
Product: Portable OpenSSH
Version: 7.2p2
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P5
Component: sshd
Assignee: unassigned-b...@mindrot.org
Reporter: ulrich.wi...@rz.uni-regensburg.de
Being logged in via SSH I changed an option in sshd_config from "no" to
"Yes". Then I used "sytemctl reload sshd.service", and it ws the last
command I could execute; specifically I was no longer able to connect
via SSH.
As it turned out, sshd died on reload because of the misspelled option
like this:
/etc/ssh/sshd_config line 77: Bad yes/no argument: Yes
And as a consequence sshd died. Any attempt to restart it failed again.
I'm not discussing whether "yes" should be allowed for "yes", but
whether it's OK for sshd to terminate on reload if one single option
was found invalid.
Wouldn't it make much more sense to ignore that option (i.e. ignore the
change) while continuing to run? I think bind did that for ages.
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