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OpenSSH 8.2 was released on 2020-02-14.

Filed under
Security
BSD

It is now possible[1] to perform chosen-prefix attacks against the SHA-1 hash algorithm for less than USD$50K. For this reason, we will be disabling the "ssh-rsa" public key signature algorithm that depends on SHA-1 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.

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Also: DragonFlyBSD Improves Its TMPFS Implementation For Better Throughput Performance

OpenSSH 8.2 Released With FIDO/U2F Support

  • OpenSSH 8.2 Released With FIDO/U2F Support

    OpenSSH 8.2 is out this Valentine's Day as the leading SSH suite. Besides working to disable the SSH-RSA public key signature algorithm due to SHA1 collision attacks, OpenSSH 8.2 also comes with new features.

    The shiny new feature of OpenSSH 8.2 is support for FIDO/U2F hardware authenticators. FIDO/U2F two-factor authentication hardware can now work with OpenSSH 8.2+, including ssh-keygen can be used to generate a FIDO token backed key. Communication to the hardware token with OpenSSH is managed by a middleware library specified via the SSH/SSHD configuration, including the option for its own built-in middleware for supporting USB tokens.

OpenSSH adds support for FIDO/U2F security keys

New Qt5 and OpenSSH in [Slackware] Current

  • New Qt5 and OpenSSH in [Slackware] Current

    Another big thing happening in -current is the new OpenSSH 8.2 release which will bring some incompatible changes, especially if you are still using ssh-rsa as the algorithm. To test whether your machine is affected, try to run this command in your shell

    ssh -oHostKeyAlgorithms=-ssh-rsa user@host

    If you managed to connect using the above command, it means that your OpenSSH software is fine, but if you don't, then it needs to be upgraded.

Corbet at LWN

  • OpenSSH 8.2 released

    OpenSSH 8.2 is out. This release removes support for the ssh-rsa key algorithm, which may disrupt connectivity to older servers; see the announcement for a way to check whether a given server can handle newer, more secure algorithms. Also new in this release is support for FIDO/U2F hardware tokens.

OpenSSH Now Supports FIDO/U2F Security Keys

  • OpenSSH Now Supports FIDO/U2F Security Keys

    OpenSSH is, by far, the single most popular tool for logging into remote servers and desktops. SSH logins are generally considered fairly safe, but not 100%. If you’re not satisfied with the out the box security offered by OpenSSH, you can always opt to go with SSH key authentication. If that’s not enough, there’s always 2 Factor Authentication, which would then require you to enter a PIN generated by an application such as OTPClient or Authy.

    As of OpenSSH 8.2, there’s a newly supported option, FIDO/U2F security keys. What this means is that you can now use 2FA hardware keys (such as the Yubi Key) to authenticate your SSH login attempt.

    2FA is often considered the easiest method of adding an additional layer of security to SSH logins. However, for many, Hardware Keys are considered the single most secure means of preventing hackers from brute-forcing your SSH passwords. To make things easy, the OpenSSH developers have made it possible to generate a FIDO token-backed key using the ssh-keygen command. So anyone used to creating SSH keys shouldn’t have any problem getting up to speed with integrating hardware keys into SSH.

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