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6.2.3.2 Ensure actions as another user are always logged

Information

sudo provides users with temporary elevated privileges to perform operations, either as the superuser or another user.

Creating an audit log of users with temporary elevated privileges and the operation(s) they performed is essential to reporting. Administrators will want to correlate the events written to the audit trail with the records written to sudo 's logfile to verify if unauthorized commands have been executed.

Solution

- Edit or create a file in the /etc/audit/rules.d/ directory, ending in .rules extension, with the relevant rules to monitor elevated privileges.

Example:

# printf "
-a always,exit -F arch=b64 -C euid!=uid -F auid!=unset -S execve -k user_emulation
-a always,exit -F arch=b32 -C euid!=uid -F auid!=unset -S execve -k user_emulation
" >> /etc/audit/rules.d/50-user_emulation.rules

 - Merge and load the rules into active configuration:

# augenrules --load

 - Check if reboot is required.

# if [[ $(auditctl -s | grep "enabled") =~ "2" ]]; then printf "Reboot required to load rules\n"; fi

See Also

https://workbench.cisecurity.org/benchmarks/26891

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-3, 800-53|AU-3(1), 800-53|AU-7, 800-53|AU-12, CSCv7|4.9

Plugin: Unix

Control ID: e28fe6e875a835bfae0919da8b9858ff4c4b6ef91e9f25e44320dd4b6646c6a1