{"description": "System executables are stored in the following directories by default:\n<pre>/bin\n/sbin\n/usr/bin\n/usr/libexec\n/usr/local/bin\n/usr/local/sbin\n/usr/sbin</pre>\nAll files in these directories should not be group-writable or world-writable.\nIf any file <i>FILE</i> in these directories is found\nto be group-writable or world-writable, correct its permission with the\nfollowing command:\n<pre>$ sudo chmod go-w <i>FILE</i></pre>", "rationale": "System binaries are executed by privileged users, as well as system services,\nand restrictive permissions are necessary to ensure execution of these programs\ncannot be co-opted.", "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": ["CM-5(6)", "CM-5(6).1", "CM-6(a)", "AC-6(1)"], "nist-csf": ["PR.AC-4", "PR.DS-5"], "srg": ["SRG-OS-000259-GPOS-00100"], "anssi": ["R50"], "ism": ["1409"], "stigid": ["UBTU-22-232015"], "stigref": ["SV-260486r991560_rule"]}, "control_references": {"anssi": ["R50"], "ism": ["1409"], "stigid": ["UBTU-22-232015"]}, "components": [], "identifiers": {}, "ocil_clause": "any system commands are found to be group-writable or world-writable", "ocil": "Verify the system commands contained in the following directories have mode \"755\" or less permissive with the following command:\n\n$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/libexec /usr/local/bin /usr/local/sbin -perm /022 -exec ls -l {} \\;", "oval_external_content": null, "fixtext": "Configure the system commands to be protected from unauthorized access.\n\nRun the following command, replacing \"[FILE]\" with any system command with a mode more permissive than \"755\".\n\n$ sudo chmod 755 [FILE]", "checktext": "", "vuldiscussion": "", "srg_requirement": "Ubuntu 22.04 system commands must have mode 755 or less permissive.", "warnings": [], "conflicts": [], "requires": [], "policy_specific_content": {"stig": {"srg_requirement": "Ubuntu 22.04 system commands must have mode 755 or less permissive.", "vuldiscussion": "If Ubuntu 22.04 allowed any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process.\n\nThis requirement applies to Ubuntu 22.04 with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges.", "checktext": "Verify the system commands contained in the following directories have mode \"755\" or less permissive with the following command:\n\n$ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/libexec /usr/local/bin /usr/local/sbin -perm /022 -exec ls -l {} \\;\n\nIf any system commands are found to be group-writable or world-writable, this is a finding.", "fixtext": "Configure the system commands to be protected from unauthorized access.\n\nRun the following command, replacing \"[FILE]\" with any system command with a mode more permissive than \"755\".\n\n$ sudo chmod 755 [FILE]"}}, "platform": null, "platforms": [], "sce_metadata": {}, "inherited_platforms": [], "cpe_platform_names": [], "inherited_cpe_platform_names": [], "bash_conditional": null, "fixes": {}, "title": "Verify that System Executables Have Restrictive Permissions", "definition_location": "/aptdata/openscap/scap-security-guide/linux_os/guide/system/permissions/files/permissions_within_important_dirs/file_permissions_binary_dirs/rule.yml", "template": null}