The audit system must be configured to audit file deletions.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Part of GEN002740

Associated with IA controls: ECAR-3, ECAR-2, ECAR-1

Associated with: CCI-000126

SV-27294r1_rule The audit system must be configured to audit file deletions.

Vulnerability discussion

If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.

Check content

Check the system audit configuration to determine if failed attempts to access files and programs are audited. # more /etc/security/audit/events If auditing of the FILE_Unlink or FS_Rmdir events is not configured, this is a finding. If no results are returned, this is a finding. Check the FILE_Unlink and FS_Rmdir audit event(s) are defined in the audit classes' stanza classes: of the /etc/security/audit/config file. #more /etc/security/audit/config Make note of the audit class(es) that the File_Unlink and FS_Rmdir events are associated with. If the FILE_Unlink and FS_Rmdir events are not associated with any audit classes in the classes: stanza this is a finding. Verify the audit class is associated with the default user and all other user ids listed in the users: stanza of the /etc/security/audit/config file. #more /etc/security/audit/config If the class(es) that the FILE_Unlink and FS_Rmdir events are not associated with the default user and all the system users in the users: stanza, this is a finding.

Fix text

Edit /etc/security/audit/events and add the FILE_Unlink or FS_Rmdir events to the list of audited events. Edit /etc/security/audit/config and add the FILE_Unlink and FS_Rmdir audit events to an audit class in the classes: stanza. Edit the /etc/security/audit/config and assign the audit classes containing the FILE_Unlink and FS_Rmdir events to the all users listed in the users: stanza.

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