DB2 must generate audit records when security objects are deleted.

From IBM DB2 V10.5 LUW Security Technical Implementation Guide

Associated with: CCI-000172

SV-89315r1_rule DB2 must generate audit records when security objects are deleted.

Vulnerability discussion

The removal of security objects from the database/DBMS would seriously degrade a system's information assurance posture. If such an event occurs, it must be logged.

Check content

To meet these requirements at the SECMAINT, OBJMAINT, and CONTEXT categories, auditing need to be implemented at the database level. Run the following SQL statement to ensure that an audit policy is defined upon the database: DB2> SELECT AUDITPOLICYNAME, AUDITPOLICYID FROM SYSCAT.AUDITUSE WHERE OBJECTTYPE IN (' ') If no rows are returned, this is a finding. Using the AUDITPOLICYID from above query find the details of audit policy: DB2> SELECT AUDITPOLICYNAME, CONTEXTSTATUS, SECMAINTSTATUS, OBJMAINTSTATUS, ERRORTYPE AS ERRORTYPE FROM SYSCAT.AUDITPOLICIES WHERE AUDITPOLICYID = If the values for CONTEXTSTATUS, OBJMAINTSTATUS and SECMAINTSTATUS are not 'B' (Both) or ERRORTYPE is not 'A' (Audit), this is a finding.

Fix text

Run the following command to define an audit policy with the needed subset using the CREATE AUDIT POLICY SQL statement: DB2> CREATE AUDIT POLICY CATEGORIES SECMAINT STATUS BOTH, OBJMAINTSTATUS STATUS BOTH, CONTEXT STATUS BOTH ERROR TYPE AUDIT To modify an existing audit policy, replace "CREATE" with "ALTER" in the preceding statement. Only the categories explicitly named in the statement will be affected. In this case, the changes take effect immediately. If CREATE was used above, run the following command to apply the policy created above to the database: DB2> AUDIT DATABASE USING POLICY Note: The SECMAINT command grants a role and the OBJMAINT command sets the grant on a user defined function.

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