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RHEL-09-654097 - RHEL 9 must audit any script or executable called by cron as root or by any privileged user.
Information
Any script or executable called by cron as root or by any privileged user must be owned by that user. It must also have the permissions 755 or more restrictive and should have no extended rights that allow any nonprivileged user to modify the script or executable.Solution
Configure RHEL 9 to audit the execution of any system call made by cron as root or by any privileged user.Add or update the following file system rules to "/etc/audit/rules.d/audit.rules":
-a always,exit -F arch=b64 -S execve -F subj_type=crond_t -F euid=0 -k cron_exec
-a always,exit -F arch=b32 -S execve -F subj_type=crond_t -F euid=0 -k cron_exec
-a always,exit -F arch=b64 -S execve -F subj_type=crond_t -F auid>=1000 -F auid!=unset -k cron_exec
-a always,exit -F arch=b32 -S execve -F subj_type=crond_t -F auid>=1000 -F auid!=unset -k cron_exec
To load the rules to the kernel immediately, use the following command:
$ sudo augenrules --load
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_9_V2R9_STIG.zip
Item Details
Audit Name: DISA Red Hat Enterprise Linux 9 STIG v2r9
Category: AUDIT AND ACCOUNTABILITY
References: 800-53|AU-12c., CAT|II, CCI|CCI-000172, Rule-ID|SV-279936r1210929_rule, STIG-ID|RHEL-09-654097, Vuln-ID|V-279936
Plugin: Unix
Control ID: becc8f67cc625f0a5f1da3a9642328f6a2bc34ba467707e35f8ac7d048a40c99