{"description": "By default, <tt>SystemD</tt> will reboot the system if the <tt>Ctrl-Alt-Del</tt>\nkey sequence is pressed Ctrl-Alt-Delete more than 7 times in 2 seconds.\n<br /><br />\nTo configure the system to ignore the <tt>CtrlAltDelBurstAction</tt>\n\nsetting, add or modify the following to <tt>/etc/systemd/system.conf</tt>:\n<pre>CtrlAltDelBurstAction=none</pre>", "rationale": "A locally logged-in user who presses Ctrl-Alt-Del, when at the console,\ncan reboot the system. If accidentally pressed, as could happen in\nthe case of mixed OS environment, this can create the risk of short-term\nloss of availability of systems due to unintentional reboot.", "severity": "high", "references": {"cis-csc": ["12", "13", "14", "15", "16", "18", "3", "5"], "cobit5": ["APO01.06", "DSS05.04", "DSS05.07", "DSS06.02"], "cui": ["3.4.5"], "hipaa": ["164.308(a)(1)(ii)(B)", "164.308(a)(7)(i)", "164.308(a)(7)(ii)(A)", "164.310(a)(1)", "164.310(a)(2)(i)", "164.310(a)(2)(ii)", "164.310(a)(2)(iii)", "164.310(b)", "164.310(c)", "164.310(d)(1)", "164.310(d)(2)(iii)"], "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": ["CM-6(a)", "AC-6(1)", "CM-6(a)"], "nist-csf": ["PR.AC-4", "PR.DS-5"], "ospp": ["FAU_GEN.1.2"], "srg": ["SRG-OS-000324-GPOS-00125", "SRG-OS-000480-GPOS-00227"]}, "control_references": {}, "components": [], "identifiers": {}, "ocil_clause": "the system is configured to reboot when Ctrl-Alt-Del is pressed more than 7 times in 2 seconds.", "ocil": "To ensure the system is configured to ignore the Ctrl-Alt-Del setting,\nenter the following command:\n<pre>$ sudo grep -i ctrlaltdelburstaction /etc/systemd/system.conf</pre>\nThe output should return:\n<pre>CtrlAltDelBurstAction=none</pre>", "oval_external_content": null, "fixtext": "Edit \"/etc/systemd/system.conf\" and add or edit the following line:\n\nCtrlAltDelBurstAction=none", "checktext": "", "vuldiscussion": "", "srg_requirement": "The systemd Ctrl-Alt-Delete burst key sequence in Ubuntu 22.04 must be disabled.", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {"stig": {"srg_requirement": "The systemd Ctrl-Alt-Delete burst key sequence in Ubuntu 22.04 must be disabled.", "vuldiscussion": "A locally logged-on user who presses Ctrl-Alt-Delete when at the console can reboot the system. If accidentally pressed, as could happen in the case of a mixed OS environment, this can create the risk of short-term loss of availability of systems due to unintentional reboot. In a graphical user environment, risk of unintentional reboot from the Ctrl-Alt-Delete sequence is reduced because the user will be prompted before any action is taken.", "checktext": "Verify Ubuntu 22.04 is configured to not reboot the system when Ctrl-Alt-Delete is pressed seven times within two seconds with the following command:\n\n$ grep -i ctrl /etc/systemd/system.conf\n\nCtrlAltDelBurstAction=none\n\nIf the \"CtrlAltDelBurstAction\" is not set to \"none\", commented out, or is missing, this is a finding.", "fixtext": "Configure the system to disable the CtrlAltDelBurstAction by added or modifying the following line in the \"/etc/systemd/system.conf\" configuration file:\n\nCtrlAltDelBurstAction=none\n\nReload the daemon for this change to take effect.\n\n$ sudo systemctl daemon-reload"}}, "platform": "package[systemd]", "platforms": ["package[systemd]"], "sce_metadata": {}, "inherited_platforms": ["system_with_kernel"], "cpe_platform_names": ["package_systemd"], "inherited_cpe_platform_names": ["system_with_kernel"], "bash_conditional": null, "fixes": {}, "title": "Disable Ctrl-Alt-Del Burst Action", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/system/accounts/accounts-physical/disable_ctrlaltdel_burstaction/rule.yml", "template": null}