DB2 must generate audit records when unsuccessful attempts to access security objects occur.

From IBM DB2 V10.5 LUW Security Technical Implementation Guide

Part of SRG-APP-000492-DB-000333

Associated with: CCI-000172

SV-89289r1_rule DB2 must generate audit records when unsuccessful attempts to access security objects occur.

Vulnerability discussion

Changes to the security configuration must be tracked.This requirement applies to situations where security data is retrieved or modified via data manipulation operations, as opposed to via specialized security functionality.In an SQL environment, types of access include, but are not necessarily limited to:SELECTINSERTUPDATEDELETEEXECUTETo aid in diagnosis, it is necessary to keep track of failed attempts in addition to the successful ones.

Check content

To ensure the database generates audit records when unsuccessful attempts are made to access security objects the following audit categories must be implemented at the database level: AUDIT CHECKING CONTEXT SECMAINT SYSADMIN VALIDATE 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. Run the following SQL statement using the AUDITPOLICYID from above query find the details of audit policy: DB2> SELECT AUDITPOLICYNAME, AUDITSTATUS, CHECKINGSTATUS, CONTEXTSTATUS, SECMAINTSTATUS, SYSADMINSTATUS, VALIDATESTATUS, ERRORTYPE AS ERRORTYPE FROM SYSCAT.AUDITPOLICIES WHERE AUDITPOLICYID = If the values for AUDITSTATUS, CHECKINGSTATUS, CONTEXTSTATUS, SECMAINTSTATUS, SYSMADMINSTATUS and VALIDATESTATUS 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, VALIDATE STATUS BOTH, CHECKING 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

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