DB2 must generate audit records when security objects are deleted.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-74641	DB2X-00-011000	SV-89315r1_rule		Medium

Description
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.

STIG	Date
IBM DB2 V10.5 LUW Security Technical Implementation Guide	2019-09-27

Details

Check Text ( C-74527r1_chk )
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.

Check Text ( C-74527r1_chk )

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 (F-81241r1_fix)
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.

Fix Text (F-81241r1_fix)

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.