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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-17417

ssh.run with Server/Proxy linked to libssh2 cannot use new key exchange algorithms

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Details

    • Team I
    • Sprint 62 (Mar 2020), Sprint 63 (Apr 2020), Sprint 64 (May 2020), Sprint 65 (Jun 2020), Sprint 66 (Jul 2020), Sprint 67 (Aug 2020), Sprint 68 (Sep 2020), Sprint 69 (Oct 2020)
    • 0.25

    Description

      Steps to reproduce:

      1. IBM sshd configuration file provided by vendor after an upgrade for a specific hardware:
        ...skipped part...
        UseDNS yes
        KexAlgorithms curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
        

      https://www.libssh2.org:

      Key Exchange Methods: diffie-hellman-group1-sha1, diffie-hellman-group14-sha1, diffie-hellman-group-exchange-sha1, diffie-hellman-group-exchange-sha256

      Result:

      error: Cannot establish SSH session: Unable to exchange encryption keys
      

      Expected:
      Provide ability to use the following Kex Algorithms:

                         curve25519-sha256
                         [email protected]
                         diffie-hellman-group-exchange-sha256
                         ecdh-sha2-nistp256
                         ecdh-sha2-nistp384
                         ecdh-sha2-nistp521
      

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              yurii Jurijs Klopovskis
              edgar.akhmetshin Edgar Akhmetshin
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              Dates

                Created:
                Updated:
                Resolved: