The Red Hat Enterprise Linux operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Part of SRG-OS-000037-GPOS-00015

Associated with: CCI-000130 CCI-000135 CCI-000172 CCI-002884

SV-86787r5_rule The Red Hat Enterprise Linux operating system must audit all uses of the sudoers file and all files in the /etc/sudoers.d/ directory.

Vulnerability discussion

Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information.At a minimum, the organization must audit the full-text recording of privileged access commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

Check content

Verify the operating system generates audit records when successful/unsuccessful attempts to access the "/etc/sudoers" file and files in the "/etc/sudoers.d/" directory. Check for modification of the following files being audited by performing the following commands to check the file system rules in "/etc/audit/audit.rules": # grep -i "/etc/sudoers" /etc/audit/audit.rules -w /etc/sudoers -p wa -k privileged-actions # grep -i "/etc/sudoers.d/" /etc/audit/audit.rules -w /etc/sudoers.d/ -p wa -k privileged-actions If the commands do not return output that match the examples, this is a finding.

Fix text

Configure the operating system to generate audit records when successful/unsuccessful attempts to access the "/etc/sudoers" file and files in the "/etc/sudoers.d/" directory. Add or update the following rule in "/etc/audit/rules.d/audit.rules": -w /etc/sudoers -p wa -k privileged-actions -w /etc/sudoers.d/ -p wa -k privileged-actions The audit daemon must be restarted for the changes to take effect.

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