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6.3.3.1 Ensure changes to system administration scope (sudoers) is collected

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

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Information

Monitor scope changes for system administrators. If the system has been properly configured to force system administrators to log in as themselves first and then use the sudo command to execute privileged commands, it is possible to monitor changes in scope. The file /etc/sudoers, or files in /etc/sudoers.d, will be written to when the file(s) or related attributes have changed. The audit records will be tagged with the identifier "scope".

Changes in the /etc/sudoers and /etc/sudoers.d files can indicate that an unauthorized change has been made to the scope of system administrator activity.

Solution

Edit or create a file in the /etc/audit/rules.d/ directory, ending in .rules extension, with the relevant rules to monitor scope changes for system administrators.

Example:

# printf '%s\n' "-w /etc/sudoers -p wa -k scope" "-w /etc/sudoers.d -p wa -k scope" >> /etc/audit/rules.d/50-scope.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/18208

Item Details

References: CSCv7|4.8

Plugin: Unix

Control ID: 6952a271ab746343eea83fa9fe8d58c7579ab6b399bf9db98b88e0e7b4a9e4cc