Detections
Analytics

1.165 AZLX-23-002475

Information

Amazon Linux 2023 must be configured to prohibit or restrict the use of functions, ports, protocols, and/or services, as defined in the Ports, Protocols, and Services Management Category Assurance List (PPSM CAL) and vulnerability assessments.

GROUP ID: V-274158RULE ID: SV-274158r1120727

To prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems.

Operating systems are capable of providing a variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component.

To support the requirements and principles of least functionality, Amazon Linux 2023 must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.

Satisfies: SRG-OS-000096-GPOS-00050, SRG-OS-000297-GPOS-00115

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Configure Amazon Linux 2023 to Prohibit/Restrict Functions, Ports, Protocols, Services. Use firewall-cmd to manage firewalld.

For example, to block a specific port (8080), use:sudo firewall-cmd --permanent --remove-port=8080/tcp

See Also

https://workbench.cisecurity.org/benchmarks/26107

Item Details

Category: ACCESS CONTROL, CONFIGURATION MANAGEMENT

References: 800-53|AC-17(1), 800-53|CM-7, 800-53|CM-7b., CAT|II, CCI|CCI-000382, CCI|CCI-002314, Rule-ID|SV-274158r1120727_rule, STIG-ID|AZLX-23-002475, Vuln-ID|V-274158

Plugin: Unix

Control ID: 76add1fe0bb6b47d5da4fe5d820d3b1c5942faf3bac96ea009ed5cf87e3ea172