Debian 10: DLA-3694-1 urgent: OpenSSH command injection and integrity issue

CVE-2021-41617

It was discovered that sshd failed to correctly initialise supplemental
groups when executing an AuthorizedKeysCommand or
AuthorizedPrincipalsCommand, where a AuthorizedKeysCommandUser or
AuthorizedPrincipalsCommandUser directive has been set to run the command
as a different user. Instead these commands would inherit the groups that
sshd was started with.

CVE-2023-48795

Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH
protocol is prone to a prefix truncation attack, known as the "Terrapin
attack". This attack allows a MITM attacker to effect a limited break of the
integrity of the early encrypted SSH transport protocol by sending extra
messages prior to the commencement of encryption, and deleting an equal
number of consecutive messages immediately after encryption starts.

Details can be found at https://terrapin-attack.com/

CVE-2023-51385