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OpenSSH: race condition in sshd allows remote code execution
(stackdiary.com)
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this post was submitted on 01 Jul 2024
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Question if I update my server and it has the new SSH (patched) package. Is that enough or do I have to restart the server as well? How can I check if the old SSH is in use currently?
The packages in most distros will also restart the server for you. Any existing SSH sessions will technically be running in vulnerable versions, but if I'm understanding the vulnerability correctly this isn't a problem, as they won't be trying to authenticate a user.
If you want to be sure, you can manually restart the ssh server yourself. On most distros
sudo systemctl restart sshdshould do it.