Title

MariaDB must enforce authorized access to all PKI private keys stored/used by the DBMS. (Cat I impact)

Discussion

The DoD standard for authentication is DoD-approved PKI certificates. PKI certificate-based authentication is performed by requiring the certificate holder to cryptographically prove possession of the corresponding private key. If the private key is stolen, an attacker can use the private key(s) to impersonate the certificate holder. In cases where the MariaDB-stored private keys are used to authenticate MariaDB to the system's clients, loss of the corresponding private keys would allow an attacker to successfully perform undetected man in the middle attacks against the MariaDB system and its clients. Both the holder of a digital certificate and the issuing authority must take careful measures to protect the corresponding private key. Private keys should always be generated and protected in FIPS 140-2 validated cryptographic modules. All access to the private key(s) of MariaDB must be restricted to authorized and authenticated users. If unauthorized users have access to one or more of the MariaDB s private keys, an attacker could gain access to the key(s) and use them to impersonate the database on the network or otherwise perform unauthorized actions.

Check Content

First, as the database administrator, verify the following settings: Note: If no specific directory given before the filename, the files are stored in DATADIR. MariaDB> SHOW GLOBAL VARIABLES LIKE 'ssl_ca'; MariaDB> SHOW GLOBAL VARIABLES LIKE 'ssl_cert'; MariaDB> SHOW GLOBAL VARIABLES LIKE 'ssl_key'; MariaDB> SHOW GLOBAL VARIABLES LIKE 'ssl_crlpath'; MariaDB> SHOW GLOBAL VARIABLES LIKE 'datadir'; Verify the permissions of the above files. Example: ls -al /path/to/ssl_cert MariaDB Enterprise Server runs as the mysql operating system user, thus should be owned by user mysql and group mysql with user read and group read file level permissions. Example: -r-------. 1 mysql If the files and directories are not properly secured, this is a finding.

Fix Text

If the SSL files are not secured properly in the file system, change the ownership and permissions with operating system operations. Example: chown mysql:mysql /path/to/file chmod 440 /path/to/file

Additional Identifiers

Rule ID: SV-253700r879613_rule

Vulnerability ID: V-253700

Group Title: SRG-APP-000176-DB-000068

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.