{"description": "SSSD should be configured to expire keys from known SSH hosts after\n<tt><sub idref=\"var_sssd_ssh_known_hosts_timeout\" /></tt> seconds.\nTo configure SSSD to known SSH hosts, set <tt>ssh_known_hosts_timeout</tt>\nto <tt><sub idref=\"var_sssd_ssh_known_hosts_timeout\" /></tt> under the\n<tt>[ssh]</tt> section in <tt>/etc/sssd/sssd.conf</tt>. For example:\n<pre>[ssh]\nssh_known_hosts_timeout = <sub idref=\"var_sssd_ssh_known_hosts_timeout\" />\n</pre>", "rationale": "If cached authentication information is out-of-date, the validity of the\nauthentication information may be questionable.", "severity": "medium", "references": {"cis-csc": ["1", "12", "15", "16", "5"], "cobit5": ["DSS05.04", "DSS05.05", "DSS05.07", "DSS05.10", "DSS06.03", "DSS06.10"], "isa-62443-2009": ["4.3.3.2.2", "4.3.3.5.1", "4.3.3.5.2", "4.3.3.6.1", "4.3.3.6.2", "4.3.3.6.3", "4.3.3.6.4", "4.3.3.6.5", "4.3.3.6.6", "4.3.3.6.7", "4.3.3.6.8", "4.3.3.6.9", "4.3.3.7.2", "4.3.3.7.4"], "isa-62443-2013": ["SR 1.1", "SR 1.10", "SR 1.2", "SR 1.3", "SR 1.4", "SR 1.5", "SR 1.7", "SR 1.8", "SR 1.9", "SR 2.1"], "iso27001-2013": ["A.18.1.4", "A.7.1.1", "A.9.2.1", "A.9.2.2", "A.9.2.3", "A.9.2.4", "A.9.2.6", "A.9.3.1", "A.9.4.2", "A.9.4.3"], "nist": ["CM-6(a)", "IA-5(13)"], "nist-csf": ["PR.AC-1", "PR.AC-6", "PR.AC-7"], "srg": ["SRG-OS-000383-GPOS-00166"]}, "control_references": {}, "components": [], "identifiers": {}, "ocil_clause": "it does not exist or is not configured properly", "ocil": "To verify that SSSD expires known SSH host keys, run the following command:\n<pre>$ sudo grep ssh_known_hosts_timeout /etc/sssd/sssd.conf</pre>\nIf configured properly, output should be\n<pre>ssh_known_hosts_timeout = <sub idref=\"var_sssd_ssh_known_hosts_timeout\" /></pre>", "oval_external_content": null, "fixtext": "", "checktext": "", "vuldiscussion": "", "srg_requirement": "", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {}, "platform": null, "platforms": [], "sce_metadata": {}, "inherited_platforms": ["package[sssd]"], "cpe_platform_names": [], "inherited_cpe_platform_names": ["package_sssd"], "bash_conditional": null, "fixes": {}, "title": "Configure SSSD to Expire SSH Known Hosts", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/services/sssd/sssd_ssh_known_hosts_timeout/rule.yml", "template": null}