cyberstrikeus 5.1 Inter-node Encryption
Profile Applicability
- Level 1 - Cassandra on Linux
Description
Cassandra offers the option to encrypt data in transit between nodes on the cluster. By default, inter-node encryption is turned off.
Rationale
Data being transferred on the wire should be encrypted to avoid network snooping, whether legitimate or not.
Audit
Run the following command to verify whether inter-node encryption is enabled.
cat cassandra.yaml | grep -in "internode_encryption:"
Acceptable values are all, dc or rack. If the internode_encryption is set to none, this is a finding.
Note: The Cassandra configuration files can be found in the conf directory of tarballs. For packages, the configuration files will be located in /etc/cassandra.
Remediation
The inter-node encryption should be implemented before anyone accesses the Cassandra server.
To enable the inter-node encryption mechanism:
- Stop the Cassandra database.
- If not done so already, build out your keystore and truststore.
- Modify
cassandra.yamlfile to modify/add entry forinternode_encryption: set it toall - Start the Cassandra database.
Default Value
internode_encryption: none
References
CIS Controls
Controls Version v8:
- 3.10 Encrypt Sensitive Data in Transit
- Encrypt sensitive data in transit. Example implementations can include: Transport Layer Security (TLS) and Open Secure Shell (OpenSSH).
Controls Version v7:
- 14.4 Encrypt All Sensitive Information in Transit
- Encrypt all sensitive information in transit.
Profile
- Level 1 | Automated