Announce: OpenSSH 8.4 released
It is now possible[1] to perform chosen-prefix attacks against the SHA-1 algorithm for less than USD$50K. For this reason, we will be disabling the "ssh-rsa" public key signature algorithm by default in a near-future release.
This algorithm is unfortunately still used widely despite the existence of better alternatives, being the only remaining public key signature algorithm specified by the original SSH RFCs.
The better alternatives include: [...]
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OpenSSH 8.4 Brings Better Support For FIDO/2FA Keys
OpenSSH 8.4 Brings Better Support For FIDO/2FA Keys
LWN on OpenSSH 8.4
OpenSSH 8.4 released