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  1. Bitbucket Data Center
  2. BSERV-19429

Disable permantly ssh-rsa1 host key algorithms

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    • Resolution: Unresolved
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    Description

      When running the following ssh command with verbose log parameter:

      ssh -vvv -p 7999 git@bitbucket-base-url
      

      We can see in the server KEXINIT proposal, that the "ssh-rsa" host key is available. We would like to get this removed from the available host keys and only allow RSA2.

      debug2: peer server KEXINIT proposal
      debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,curve448-sha512,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256,diffie-hellman-group18-sha512,diffie-hellman-group17-sha512,diffie-hellman-group16-sha512,diffie-hellman-group15-sha512,diffie-hellman-group14-sha256,ext-info-s,kex-strict-s-v00@openssh.com
      debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa
      debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
      debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
      debug2: MACs ctos: hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
      debug2: MACs stoc: hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
      

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            Unassigned Unassigned
            9c941f86b120 Pablo Silva
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            Dates

              Created:
              Updated: