{"description": "\nIf <tt>log_group</tt> in <tt>/etc/audit/auditd.conf</tt> is set to a group other than the <tt>root</tt>\ngroup account, change the mode of the audit log files with the following command:\n<pre>$ sudo chmod 0750 /var/log/audit</pre>\n<br />\nOtherwise, change the mode of the audit log files with the following command:\n<pre>$ sudo chmod 0700 /var/log/audit</pre>", "rationale": "If users can write to audit logs, audit trails can be modified or destroyed.", "severity": "medium", "references": {"cis-csc": ["1", "11", "12", "13", "14", "15", "16", "18", "19", "3", "4", "5", "6", "7", "8"], "cobit5": ["APO01.06", "APO11.04", "APO12.06", "BAI03.05", "BAI08.02", "DSS02.02", "DSS02.04", "DSS02.07", "DSS03.01", "DSS05.04", "DSS05.07", "DSS06.02", "MEA02.01"], "isa-62443-2009": ["4.2.3.10", "4.3.3.3.9", "4.3.3.5.8", "4.3.3.7.3", "4.3.4.4.7", "4.3.4.5.6", "4.3.4.5.7", "4.3.4.5.8", "4.4.2.1", "4.4.2.2", "4.4.2.4"], "isa-62443-2013": ["SR 2.1", "SR 2.10", "SR 2.11", "SR 2.12", "SR 2.8", "SR 2.9", "SR 5.2", "SR 6.1"], "iso27001-2013": ["A.10.1.1", "A.11.1.4", "A.11.1.5", "A.11.2.1", "A.12.4.1", "A.12.4.2", "A.12.4.3", "A.12.4.4", "A.12.7.1", "A.13.1.1", "A.13.1.3", "A.13.2.1", "A.13.2.3", "A.13.2.4", "A.14.1.2", "A.14.1.3", "A.16.1.4", "A.16.1.5", "A.16.1.7", "A.6.1.2", "A.7.1.1", "A.7.1.2", "A.7.3.1", "A.8.2.2", "A.8.2.3", "A.9.1.1", "A.9.1.2", "A.9.2.3", "A.9.4.1", "A.9.4.4", "A.9.4.5"], "nerc-cip": ["CIP-003-8 R5.1.1", "CIP-003-8 R5.2", "CIP-003-8 R5.3", "CIP-004-6 R2.3", "CIP-004-6 R3.3", "CIP-007-3 R2.1", "CIP-007-3 R2.2", "CIP-007-3 R2.3", "CIP-007-3 R5.1", "CIP-007-3 R5.1.1", "CIP-007-3 R5.1.2", "CIP-007-3 R6.5"], "nist": ["CM-6(a)", "AC-6(1)", "AU-9"], "nist-csf": ["DE.AE-3", "DE.AE-5", "PR.AC-4", "PR.DS-5", "PR.PT-1", "RS.AN-1", "RS.AN-4"], "srg": ["SRG-OS-000057-GPOS-00027", "SRG-OS-000058-GPOS-00028", "SRG-OS-000059-GPOS-00029"], "cis": ["6.3.4.4"], "stigid": ["UBTU-22-653060"], "stigref": ["SV-260600r958438_rule"]}, "control_references": {"cis": ["6.3.4.4"], "stigid": ["UBTU-22-653060"]}, "components": [], "identifiers": {}, "ocil_clause": "audit logs have a more permissive mode", "ocil": "Verify the audit log directories have a correct mode or less permissive mode.\n\nFind the location of the audit logs:\n\n$ sudo grep \"^log_file\" /etc/audit/auditd.conf\n\n\nFind the group that owns audit logs:\n\n$ sudo grep \"^log_group\" /etc/audit/auditd.conf\n\n\nRun the following command to check the mode of the system audit logs:\n\n$ sudo stat -c \"%a %n\" [audit_log_directory]\n\nReplace \"[audit_log_directory]\" to the correct audit log directory path, by default this location is \"/var/log/audit\".\n\n\nIf the log_group is \"root\" or is not set, the correct permissions are 0700, otherwise they are 0750.", "oval_external_content": null, "fixtext": "Configure the audit log directory to be protected from unauthorized read access by setting the correct permissive mode.\n\nFind the location of the audit logs:\n\n$ sudo grep \"^log_file\" /etc/audit/auditd.conf\n\n\nFind the group that owns audit logs:\n\n$ sudo grep \"^log_group\" /etc/audit/auditd.conf\n\nIf the log_group is \"root\" or is not set, the correct permissions are 0700, otherwise they are 0750.\n\nSet the correct permissions mode by the following command:\n\n$ sudo chmod [correct_permissions] [audit_log_directory]\n\n\nReplace \"[audit_log_directory]\" to the correct audit log directory path, by default this location is \"/var/log/audit\".", "checktext": "", "vuldiscussion": "", "srg_requirement": "Ubuntu 22.04 audit log directory must have a mode of 0750 or less permissive to prevent unauthorized read access.", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {"stig": {"srg_requirement": "Ubuntu 22.04 audit log directory must have a mode of 0750 or less permissive to prevent unauthorized read access.", "vuldiscussion": "If users can write to audit logs, audit trails can be modified or destroyed.", "checktext": "Verify the audit log directories have a correct mode or less permissive mode.\n\nFind the location of the audit logs:\n\n$ sudo grep \"^log_file\" /etc/audit/auditd.conf\n\nFind the group that owns audit logs:\n\n$ sudo grep \"^log_group\" /etc/audit/auditd.conf\n\nRun the following command to check the mode of the system audit logs:\n\n$ sudo stat -c \"%a %n\" [audit_log_directory]\n\nReplace \"[audit_log_directory]\" to the correct audit log directory path, by default this location is \"/var/log/audit\".\n\nIf the log_group is \"root\" or is not set, the correct permissions are 0700, otherwise they are 0750.\n\nIf audit logs have a more permissive mode, then this is a finding.", "fixtext": "The audit daemon must be restarted for the changes to take effect."}}, "platform": null, "platforms": [], "sce_metadata": {}, "inherited_platforms": ["package[audit]", "system_with_kernel"], "cpe_platform_names": [], "inherited_cpe_platform_names": ["system_with_kernel", "package_audit"], "bash_conditional": null, "fixes": {}, "title": "System Audit Logs Must Have Mode 0750 or Less Permissive", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/auditing/auditd_configure_rules/directory_permissions_var_log_audit/rule.yml", "template": null}