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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.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to AU-12 via CCI-000172

Title

RHEL 9 must audit any script or executable called by cron as root or by any privileged user.

Control

Verify RHEL 9 is configured to audit the execution of any system call made by cron as root or by any privileged user with the following command: $ sudo auditctl -l | grep crond_t -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 If this command does not return the expected output, or the lines are commented out, this is a finding.

Discussion

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.

Related controls

CCI-000172

Fix

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