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ノードにSSH設定が適用されておらず、削除された暗号が引き続き使用されている

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Category:
ontap-9
Specialty:
core<a>2009934035</a>
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環境

  • ONTAP 9
  • SSH
  • 暗号
  • 脆弱性

問題

  • HAペアの1つのノードから暗号が削除されない
  • security ssh showの出力に暗号が削除されたことが示されている
Cluster1::> security ssh show -vserver Cluster1 -instance
                       Vserver: Cluster1
       Key Exchange Algorithms: diffie-hellman-group-exchange-sha256,
                                ecdh-sha2-nistp256, ecdh-sha2-nistp384,
                                ecdh-sha2-nistp521
                       Ciphers: aes256-ctr, aes192-ctr, aes128-ctr, aes128-gcm,   
                                aes256-gcm                           
                MAC Algorithms: hmac-sha2-256, hmac-sha2-256-etm,
                                hmac-sha2-512, hmac-sha2-512-etm
  • ただし、Linuxクライアントからnmapを実行すると、許可されていない暗号がsshで使用されていることが示されます。
user:~ $ nmap --script ssh2-enum-algos -Pn x.x.x.x                         

Starting Nmap 6.40 ( http://nmap.org ) at 2024-02-05 02:00
Nmap scan report for host.localhost.com (x.x.x.x)
Host is up (0.0070s latency).
Not shown: 995 closed ports
PORT      STATE SERVICE
22/tcp    open  ssh
| ssh2-enum-algos:
|   kex_algorithms (4)
|       diffie-hellman-group-exchange-sha256
|       ecdh-sha2-nistp256
|       ecdh-sha2-nistp384
|       ecdh-sha2-nistp521
|   server_host_key_algorithms (1)
|       ecdsa-sha2-nistp256
|   encryption_algorithms (9)
|       aes128-ctr
|       aes192-ctr
|       aes256-ctr
|      aes128-cbc                  <<<<< Disallowed, unsecure SSH ciphers
|      3des-cbc                  <<<<<
|      aes192-cbc                  <<<<<
|      aes256-cbc                  <<<<<
|       aes128-gcm@openssh.com
|       aes256-gcm@openssh.com
|   mac_algorithms (4)
|       hmac-sha2-256
|       hmac-sha2-256-etm@openssh.com
|       hmac-sha2-512
|       hmac-sha2-512-etm@openssh.com
|   compression_algorithms (2)
|       none
|_      zlib@openssh.com
111/tcp   open  rpcbind
443/tcp   open  https
10000/tcp open  snet-sensor-mgmt
30000/tcp open  unknown
Nmap done: 1 IP address (1 host up) scanned in 0.24 seconds

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