cis-cassandra5-3.5

DevOps & Security

Ensure that Cassandra only listens for network connections on authorized interfaces

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Ensure that Cassandra only listens for network connections on authorized interfaces (Manual)

Profile Applicability

Level 1 - Cassandra on Linux

Description

When listen_address is blank and listen_interface is commented out, this will be set automatically by InetAddress.getLocalHost(). Presuming the node is configured correctly, e.g. hostname, name resolution, etc., this will configure the node to use the address associated with the hostname. The listen_address must not be set to 0.0.0.0.

Rationale

Setting the address or interface to bind to will tell other Cassandra nodes to which address or interface to connect. This must be changed from the default in order for multiple nodes to be able to communicate.

Impact

None

Audit Procedure

Check the value of listen_address or listen_interface in the cassandra.yaml. If listen_address is set 0.0.0.0 or a non-authorized address or interface is specified, this is a finding.

Run these command to assist:

cat cassandra.yaml | grep -in "listen_address:" | grep "0.0.0.0"
cat cassandra.yaml | grep -in "listen_address:"
cat cassandra.yaml | grep -in "listen_interface:"

Remediation

Set the listen_address or listen_interface, not both, in the cassandra.yaml to an authorized address or interface.

Default Value

listen_address: localhost

listen_interface: eth0

but is commented out by default.

References

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	4.4 Implement and Manage a Firewall on ServersImplement and manage a firewall on servers, where supported. Example implementations include a virtual firewall, operating system firewall, or a third-party firewall agent.	●	●	●
v7	9.2 Ensure Only Approved Ports, Protocols and Services Are RunningEnsure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.		●	●