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SSH protocol deactivated message

craigthomp
New Poster

SSH protocol deactivated message

I updated my system apps to RM 21.3.2.  After this update I no longer have SSH access.  I now get a deactivated message.  Is there new permissions that need to be set for the user?

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2 REPLIES 2
mlaml
Member

Re: SSH protocol deactivated message

Hi,

you're correct - the behaviour regarding SSH as a debug interface has changed with RM 21.03.2. Beginning with this release, the SSH service is disabled by default and automatically enabled when a system-user account is activated. When the system-user account is present, SSH behaves exactly as before - you can assign the permission to other users via the membership in the "sshuser" group. When the system-user account expires or is deleted manually, SSH is disabled automatically.

This change was required to address a security risk which might allow an attacker to escalate its privileges via a combination of SSH access and the Ubuntu Core snap mechanism. Since SSH is considered a development interface, we assume that for regular operation SSH is not required. Therefore, I can currently not promise you that the old behaviour will return. Could you explain your use case? This might help us to better understand who uses SSH and what for.

CodeShepherd
Community Moderator

Re: SSH protocol deactivated message

Please see also this thread for more information.

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