{"description": "Ensure that unsuccessful attempts to change an ownership of files or directories are audited.\n\nThe following rules configure audit as described above:\n<pre>## Unsuccessful ownership change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change    </pre>\n\nLoad new Audit rules into kernel by running:\n<pre>augenrules --load</pre>\n\nNote: This rule uses a special set of Audit rules to comply with OSPP 4.2.1. You may reuse this rule in different profiles. If you decide to do so, it is recommended that you inspect contents of the file closely and make sure that they are aligned with your needs.", "rationale": "Unsuccessful attempts to change an ownership of files or directories might be signs of a malicious activity. Having such events audited helps in monitoring and investigation of such activities.", "severity": "medium", "references": {"nist": ["AU-2(a)"], "ospp": ["FAU_GEN.1.1.c"], "srg": ["SRG-OS-000462-GPOS-00206", "SRG-OS-000463-GPOS-00207", "SRG-OS-000465-GPOS-00209", "SRG-OS-000474-GPOS-00219", "SRG-OS-000475-GPOS-00220", "SRG-OS-000466-GPOS-00210", "SRG-OS-000064-GPOS-00033"]}, "control_references": {}, "components": [], "identifiers": {}, "ocil_clause": "the file does not exist or the content differs", "ocil": "To verify that the <tt>Audit</tt> is correctly configured according to recommended rules, check the content of the file with the following command:\n<pre>cat /etc/audit/rules.d/30-ospp-v42-6-owner-change-failed.rules</pre>\nThe output has to be exactly as follows:\n<pre>## Unsuccessful ownership change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change    </pre>", "oval_external_content": null, "fixtext": "", "checktext": "", "vuldiscussion": "", "srg_requirement": "", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {}, "platform": null, "platforms": ["ppc64le_arch"], "sce_metadata": {}, "inherited_platforms": ["system_with_kernel"], "cpe_platform_names": ["ppc64le_arch"], "inherited_cpe_platform_names": ["system_with_kernel"], "bash_conditional": null, "fixes": {}, "title": "Configure auditing of unsuccessful ownership changes (ppc64le)", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/auditing/policy_rules/audit_owner_change_failed_ppc64le/rule.yml", "template": {"name": "audit_file_contents", "vars": {"filepath": "/etc/audit/rules.d/30-ospp-v42-6-owner-change-failed.rules", "contents": "## Unsuccessful ownership change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change\n-a always,exit -F arch=b64 -S lchown,fchown,chown,fchownat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-owner-change"}, "backends": {}}}