Description

This policy identifies Google GCE Networks that have Firewall Rules allowing unrestricted incoming traffic (0.0.0.0/0) from the internet to common Oracle Database ports: 1521, 2483, and 2484 over TCP or UDP.

In GCP, Firewall Rules are defined at the VPC Network level. Each rule either allows or denies traffic based on its configuration. These configurations specify the type of traffic (e.g., protocols and ports) and the source or destination (e.g., IP addresses, subnets, and instances).

Rationale

Exposing Oracle Database ports directly to the public internet poses a critical security risk. Database servers are high-value targets and should never be directly accessible from untrusted networks. Public exposure increases the risk of brute-force credential attacks, exploitation of known Oracle vulnerabilities, and denial-of-service (DoS) attacks. Database access should be restricted to trusted application servers and administrative hosts within private network segments.

Impact

All OracleDB connections from outside of the network to the concerned VPC(s) can be blocked. If there is a legitimate operational need for remote access, specific trusted source IP addresses should be explicitly defined in firewall rules to whitelist access to the required Oracle Database ports.

Audit

This policy flags a Google GCE Network as INCOMPLIANT if it includes at least one Firewall Rule that meets all of the following conditions:

• Source Ranges is 0.0.0.0/0 or ::/0
• Direction is INGRESS
• Allowed Protocols / Ports JSON specifies the tcp or udp protocols and includes any of the following ports in the startPort - endPort range: 1521, 2483, 2484.