{"description": "\nTo properly set the permissions of <code>/etc/ssh/sshd_config</code>, run the command:\n<pre>$ sudo chmod 0600 /etc/ssh/sshd_config</pre>", "rationale": "Service configuration files enable or disable features of their respective\nservices that if configured incorrectly can lead to insecure and vulnerable\nconfigurations. Therefore, service configuration files should be owned by the\ncorrect group to prevent unauthorized changes.", "severity": "medium", "references": {"cis-csc": ["12", "13", "14", "15", "16", "18", "3", "5"], "cobit5": ["APO01.06", "DSS05.04", "DSS05.07", "DSS06.02"], "isa-62443-2009": ["4.3.3.7.3"], "isa-62443-2013": ["SR 2.1", "SR 5.2"], "iso27001-2013": ["A.10.1.1", "A.11.1.4", "A.11.1.5", "A.11.2.1", "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.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 R5.3", "CIP-004-6 R2.3", "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"], "nist": ["AC-17(a)", "CM-6(a)", "AC-6(1)"], "nist-csf": ["PR.AC-4", "PR.DS-5"], "srg": ["SRG-OS-000480-GPOS-00227"], "anssi": ["R50"], "cis": ["5.1.1"], "pcidss4": ["2.2.6", "2.2"]}, "control_references": {"anssi": ["R50"], "cis": ["5.1.1"], "pcidss4": ["2.2.6", "2.2"]}, "components": [], "identifiers": {}, "ocil_clause": "/etc/ssh/sshd_config does not have unix mode -rw-------", "ocil": "To check the permissions of <code>/etc/ssh/sshd_config</code>,\nrun the command:\n<pre>$ ls -l /etc/ssh/sshd_config</pre>\nIf properly configured, the output should indicate the following permissions:\n<code>-rw-------</code>", "oval_external_content": null, "fixtext": " Configure the \"/etc/ssh/sshd_config\" file to \"0600\" by running the following command:\n$ sudo chmod 0600 /etc/ssh/sshd_config", "checktext": "", "vuldiscussion": "", "srg_requirement": " The Ubuntu 22.04 /etc/ssh/sshd_config file must have mode 0600 or less permissive to prevent unauthorized access.", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {"stig": {"srg_requirement": "Ubuntu 22.04 SSH server configuration files' permissions must not be modified.", "vuldiscussion": "Service configuration files enable or disable features of their respective services that if configured incorrectly can lead to insecure and vulnerable configurations. Therefore, service configuration files should be owned by the correct group to prevent unauthorized changes.", "checktext": "Verify the permissions of the \"/etc/ssh/sshd_config\" file with the following command:\n\n$ sudo rpm --verify openssh-server\n\nIf the command returns any output, this is a finding.", "fixtext": "Run the following commands to restore the correct permissions of OpenSSH server configuration files:\n\n$ sudo dnf reinstall -y openssh-server\n$ rpm --setugids openssh-server\n$ rpm --setperms openssh-server"}}, "platform": "system_with_kernel", "platforms": ["system_with_kernel"], "sce_metadata": {}, "inherited_platforms": [], "cpe_platform_names": ["system_with_kernel"], "inherited_cpe_platform_names": [], "bash_conditional": null, "fixes": {}, "title": "Verify Permissions on SSH Server config file", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/services/ssh/file_permissions_sshd_config/rule.yml", "template": {"name": "file_permissions", "vars": {"filepath": ["/etc/ssh/sshd_config"], "filemode": "0600"}, "backends": {}}}