{"description": "All USB support can be disabled by adding the <tt>nousb</tt>\nargument to the kernel's boot loader configuration. To do so,\nAdd the <tt>nousb</tt> kernel argument via a <tt>MachineConfig</tt>\nobject.", "rationale": "Disabling the USB subsystem within the Linux kernel at system boot will\nprotect against potentially malicious USB devices, although it is only practical\nin specialized systems.", "severity": "medium", "references": {"cis-csc": ["12", "16"], "cobit5": ["APO13.01", "DSS01.04", "DSS05.03", "DSS05.04", "DSS05.05", "DSS05.07", "DSS06.03"], "hipaa": ["164.308(a)(3)(i)", "164.308(a)(3)(ii)(A)", "164.310(d)(1)", "164.310(d)(2)", "164.312(a)(1)", "164.312(a)(2)(iv)", "164.312(b)"], "isa-62443-2009": ["4.3.3.2.2", "4.3.3.5.2", "4.3.3.6.6", "4.3.3.7.2", "4.3.3.7.4"], "isa-62443-2013": ["SR 1.1", "SR 1.13", "SR 1.2", "SR 1.4", "SR 1.5", "SR 1.9", "SR 2.1", "SR 2.6"], "iso27001-2013": ["A.11.2.6", "A.13.1.1", "A.13.2.1", "A.6.2.1", "A.6.2.2", "A.7.1.1", "A.9.2.1"], "nist": ["MP-7", "CM-6(a)"], "nist-csf": ["PR.AC-3", "PR.AC-6"]}, "control_references": {}, "components": [], "identifiers": {}, "ocil_clause": null, "ocil": null, "oval_external_content": null, "fixtext": "", "checktext": "", "vuldiscussion": "", "srg_requirement": "", "warnings": [{"functionality": "Disabling all kernel support for USB will cause problems for systems\nwith USB-based keyboards, mice, or printers. This configuration is\ninfeasible for systems which require USB devices, which is common."}], "conflicts": [], "requires": [], "policy_specific_content": {}, "platform": null, "platforms": [], "sce_metadata": {}, "inherited_platforms": [], "cpe_platform_names": [], "inherited_cpe_platform_names": [], "bash_conditional": null, "fixes": {}, "title": "Disable Kernel Support for USB via Bootloader Configuration", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/system/permissions/mounting/coreos_nousb_kernel_argument/rule.yml", "template": {"name": "coreos_kernel_option", "vars": {"arg_name": "nousb"}, "backends": {}}}