Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-27989

No TLS error for clients when extended key usage does not match

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 10.6.7
    • 10.6
    • Scripts & Clients
    • None
    • Fedora 35, native 10.6.7 client with server 10.6.7 in docker

    Description

      Connecting with certificates that have the wrong extended key usage attributes (serverAuth instead of clientAuth) produces no error message on the client or the database.

      [markusjm@monolith ssl-certs]$ mysql -u maxuser -pmaxpwd -h 127.0.0.1 -D test --ssl --ssl-key=client-key.pem --ssl-cert=client-cert.pem --ssl-ca=ca.pem -P 3000 -e "select 1"
      +---+
      | 1 |
      +---+
      | 1 |
      +---+
      [markusjm@monolith ssl-certs]$ mysql -u maxuser -pmaxpwd -h 127.0.0.1 -D test --ssl --ssl-key=server-key.pem --ssl-cert=server-cert.pem --ssl-ca=ca.pem -P 3000 -e "select 1"
      ERROR 2013 (HY000): Lost connection to server at 'reading authorization packet', system error: 0
      

      The only thing that the server logs is this:

      2022-03-03  7:21:59 8 [Warning] Aborted connection 8 to db: 'unconnected' user: 'unauthenticated' host: '127.0.0.1' (This connection closed normally without authentication)
      

      However, if I use the wrong certificate on the server, I get the following error message regardless of the type:

      [markusjm@monolith ssl-certs]$ mysql -u maxuser -pmaxpwd -h 127.0.0.1 -D test --ssl --ssl-key=client-key.pem --ssl-cert=client-cert.pem --ssl-ca=ca.pem -P 3000 -e "select 1"
      ERROR 2026 (HY000): SSL connection error: unsupported certificate purpose
      [markusjm@monolith ssl-certs]$ mysql -u maxuser -pmaxpwd -h 127.0.0.1 -D test --ssl --ssl-key=server-key.pem --ssl-cert=server-cert.pem --ssl-ca=ca.pem -P 3000 -e "select 1"
      ERROR 2026 (HY000): SSL connection error: unsupported certificate purpose
      

      The client-cert.pem certificate has:

              X509v3 extensions:
                  X509v3 Basic Constraints: 
                      CA:FALSE
                  Netscape Cert Type: 
                      SSL Client, S/MIME
                  Netscape Comment: 
                      OpenSSL Generated Client Certificate
                  X509v3 Subject Key Identifier: 
                      5D:97:20:0B:30:A6:96:FD:89:C8:AB:92:57:9B:7B:B5:89:06:A8:D0
                  X509v3 Authority Key Identifier: 
                      DirName:/C=FI/L=Default City/O=Default Company Ltd/CN=localhost
                      serial:56:EA:28:16:63:2F:A1:F9:E3:1F:83:23:13:96:19:44:8B:E1:A9:88
       
                  X509v3 Key Usage: critical
                      Digital Signature, Non Repudiation, Key Encipherment
                  X509v3 Extended Key Usage: 
                      TLS Web Client Authentication, E-mail Protection
                  X509v3 Subject Alternative Name: 
                      DNS:localhost
      

      The server-cert.pem certificate has:

              X509v3 extensions:
                  X509v3 Basic Constraints: 
                      CA:FALSE
                  Netscape Cert Type: 
                      SSL Server
                  Netscape Comment: 
                      OpenSSL Generated Server Certificate
                  X509v3 Subject Key Identifier: 
                      48:CB:85:39:83:05:43:34:8D:D4:78:0B:20:4B:2B:0E:B8:71:E0:4A
                  X509v3 Authority Key Identifier: 
                      DirName:/C=FI/L=Default City/O=Default Company Ltd/CN=localhost
                      serial:56:EA:28:16:63:2F:A1:F9:E3:1F:83:23:13:96:19:44:8B:E1:A9:88
       
                  X509v3 Key Usage: critical
                      Digital Signature, Key Encipherment
                  X509v3 Extended Key Usage: 
                      TLS Web Server Authentication
                  X509v3 Subject Alternative Name: 
                      DNS:localhost
      

      The certificate MariaDB is configured with has:

              X509v3 extensions:
                  X509v3 Basic Constraints: 
                      CA:FALSE
                  Netscape Cert Type: 
                      SSL Server
                  Netscape Comment: 
                      OpenSSL Generated Server Certificate
                  X509v3 Subject Key Identifier: 
                      FC:7F:37:42:8F:10:AC:E1:7D:15:8F:16:93:AF:7B:83:81:9B:60:C1
                  X509v3 Authority Key Identifier: 
                      DirName:/C=FI/L=Default City/O=Default Company Ltd/CN=localhost
                      serial:56:EA:28:16:63:2F:A1:F9:E3:1F:83:23:13:96:19:44:8B:E1:A9:88
       
                  X509v3 Key Usage: critical
                      Digital Signature, Key Encipherment
                  X509v3 Extended Key Usage: 
                      TLS Web Server Authentication
                  X509v3 Subject Alternative Name: 
                      DNS:localhost
      

      Grants for the user:

      MariaDB [test]> show grants;
      +-------------------------------------------------------------------------------------------------------------------------------------------+
      | Grants for maxuser@127.0.0.1                                                                                                              |
      +-------------------------------------------------------------------------------------------------------------------------------------------+
      | GRANT ALL PRIVILEGES ON *.* TO `maxuser`@`127.0.0.1` IDENTIFIED BY PASSWORD '*5EDBD32E469DAE0CE10E6999C3899DEFCB9F12E0' WITH GRANT OPTION |
      +-------------------------------------------------------------------------------------------------------------------------------------------+
      1 row in set (0.000 sec)
      

      Attachments

        1. server-key.pem
          3 kB
        2. server-cert.pem
          6 kB
        3. mdb-key.pem
          3 kB
        4. mdb-cert.pem
          6 kB
        5. client-key.pem
          3 kB
        6. client-cert.pem
          6 kB
        7. ca-key.pem
          2 kB
        8. ca.pem
          1 kB

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              georg Georg Richter
              markus makela markus makela
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              Dates

                Created:
                Updated:

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