| Oracle® Audit Vault Auditor's Guide Release 10.2.3.1 Part Number E13842-02 |
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View PDF |
| Oracle® Audit Vault Auditor's Guide Release 10.2.3.1 Part Number E13842-02 |
|
|
View PDF |
This chapter contains:
General Steps for Creating Oracle Audit Vault Policies and Alerts
Fetching Audit Policy Settings from the Source Oracle Database
Creating Oracle Audit Vault Policies for Fine-Grained Auditing
Exporting Oracle Audit Vault Policies to the Source Oracle Database
Copying Oracle Audit Vault Policies to Other Oracle Databases
In the Audit Vault Console, you can create the following types of audit policies for Oracle databases:
SQL statements
Schema objects
Privileges
Fine-grained auditing
Capture rules (for redo log file activities)
For all database types, you can create alerts. See Section 2.12 for more information.
In general, to create Oracle Audit Vault policies and alerts, you follow these steps:
Fetch the current policy settings from the source Oracle database.
See Section 2.3 for more information.
Create audit policies.
See the following sections:
Section 2.4 to create SQL statement policies
Section 2.5 to create schema object policies
Section 2.6 to create privilege policies
Section 2.7 to create fine-grained auditing policies
Section 2.8 to create capture rules for redo log file auditing
Section 2.9 to verify the Oracle Audit Vault policies
Save the Oracle Audit Vault policy settings to a .sql file or manually provision them to the source database.
See the following sections:
Section 2.10 to export the policies to the source Oracle database
Section 2.11 to copy the policy settings to other Oracle databases
Optionally, create alerts.
See Section 2.12 for more information.
Optionally, set a retention period for the audit data from all source databases.
See Section 2.13 for more information.
Before you create policies in the Audit Vault Console, you must fetch the current audit settings that have been created in the source Oracle database. This way, you have a snapshot of the audit settings in the source database from that point in time, before you begin to create policies and alerts.
Follow these steps:
To retrieve audit settings from the source Oracle Database:
Log in to the Audit Vault Console as a user who has been granted the AV_AUDITOR role.
Section 1.4 explains how to start the Audit Vault Console. The Overview page appears.
In the Audit Vault Console, select the Audit Policy tab.
By default, the Audit Settings page appears.
From the Audit Source listing, select the source database, and then click the Retrieve from Source button.
To fetch audit settings from all Oracle source databases, click the Fetch All button.
To filter the list of audit sources, enter text in the Audit Source text field or click the flashlight icon to display the Search And Select: Audit Source page. If you make selections on the Search And Select: Audit Source page, when you return, the Audit Source column will be populated with your selections.
The Audit Vault Console displays a summary of audit settings for the source database.
At this stage, you are ready to view the audit settings. Table 2-1 shows the fields used in the audit settings list in the Audit Settings page, which indicate the state of the source database. If the Problem field contains a value higher than 0, then most likely you must activate (that is, update for use in Oracle Audit Vault) the audit settings. If the Problem field is set to 0, then all the existing audit settings already have been activated.
Table 2-1 Fields Under Apply Audit Settings in the Audit Settings Page
| Field | Description |
|---|---|
|
Select |
Select which audit source to retrieve |
|
Audit Source |
Displays the name of the audit source database |
|
In Use |
Number of active settings in the source database |
|
Needed |
Number of audit settings you (the auditor) have specified to be required |
|
Problem |
Number of audit settings that require attention by the auditor |
|
Audit Trail |
The location to which database audit records are directed, based on the If the setting is |
|
Audit Sys |
Indicates that the |
|
Last Retrieved |
The time that the information for the selected audit source was last retrieved |
|
Last Provisioned |
The time that the settings were provisioned to the source database |
After you retrieve the source database audit settings, you can view and modify them as needed. Remember that you are capturing a snapshot of the audit settings from a particular point in time: if these settings change in the source database, then you must retrieve the audit settings again.
In the Audit Settings page, select the name of the source database listed in the Audit Source field.
The Apply Audit Settings section appears. In the following example, the Problem field shows that there are three SQL statement audit settings that may be activated or removed from the source database. None of the other audit settings types must be activated.
A nonzero value in the Problem field can indicate that an audit policy that was created in the source database has not yet been updated in Oracle Audit Vault. If you do not need the audit policy, then do not activate it. In that case, when you provision the Audit Vault settings back to the source database, this audit policy will be deleted in the source database.
To update the statement audit settings, select the Statement tab.
The Statement page appears. The settings that must be updated are indicated with an X in the Needed column. As the Audit Vault auditor, you can indicate that the audit policies are required.
Select each X in the Needed column to update the audit settings for SQL statements. Alternatively, click the Mark All as Needed button select all the audit settings. To deselect all of the selected settings, click Mark All as Not Needed.
A check mark indicates that the Oracle Audit Vault auditor has determined that the audit setting is needed. A green up arrow in the In Use column indicates that both Oracle Audit Vault and the source database are currently storing consistent definitions of the audit policies. A red X in the Needed column indicates that these policy definitions are inconsistent, with Oracle Audit Vault having the outdated version of the policy.
At this stage, the audit settings between the source database and Oracle Audit Vault should be the same, except for any settings that you have omitted in Step 3, or if changes in the audit settings are made independently in the source database.
Statement auditing audits SQL statements by type of statement, not by the specific schema objects on which the statement operates. Statement auditing can be broad or focused (for example, by auditing the activities of all database users or of only a select list of users). Typically broad, statement auditing audits the use of several types of related actions for each option. These statements are in the following categories:
Data definition statements (DDL). For example, AUDIT TABLE audits all CREATE TABLE and DROP TABLE statements. AUDIT TABLE tracks several DDL statements regardless of the table on which they are issued. You can also set statement auditing to audit selected users or every user in the database.
Data manipulation statements (DML). For example, AUDIT SELECT TABLE audits all SELECT ... FROM TABLE or SELECT ... FROM VIEW statements, regardless of the table or view.
To define a SQL statement audit policy:
If necessary, retrieve and activate the current statement audit policies.
See Section 2.3 for more information.
In the Audit Settings page, select the Statement tab to display the Statement page.
Table 2-2 describes the fields used in the Statement page.
Click the Create button and in the Create Statement Audit page, define the audit policy.
Table 2-3 describes the Create Statement Audit fields.
Click OK.
The statement audit policy is created. To ensure that the statement audit policy is semantically correct, see Section 2.9.
In the Overview page, select Save All Audit Settings.
To display the Overview page, click the Audit Settings link, and then in the Audit Settings page, select the name of the source database.
Table 2-2 lists the fields used in the Statement page.
Table 2-2 Fields in the Statement Page
| Field | Description |
|---|---|
|
(Leftmost column) |
An exclamation mark icon indicates one of the following conditions:
|
|
Statement |
The statement that is audited |
|
User |
The user to which this setting applies, if any |
|
Proxy User |
The proxy user for the database, if any |
|
Execution Condition |
The execution condition audited: |
|
Audit granularity |
The granularity of auditing: |
|
In Use |
The arrow points upward if the setting is active in the source database and downward if it has not been provisioned or is not active. |
|
Needed |
A check mark indicates that the policy is needed. An X indicates that the policy is not needed. If a policy that is not in use is set to needed, the In Use arrow points up after provisioning. If a policy that is in use is set to not needed, the audit policy is no longer displayed after provisioning. To select all policies as needed, click the Mark All as Needed button. To reverse this action, clickMark All as Not Needed. |
|
(Rightmost column) |
Click the trash can icon to remove the policy. You can use the trash can icon to remove the policy only if you had just created it and decided it was not required in the source database, or if it is not active in the source database. |
Table 2-3 lists the fields used in the Create Statement Audit page.
Table 2-3 Fields in the Create Statement Audit Page
| Field | Description |
|---|---|
|
Statements |
Select the SQL statements to audit. To display a list of SQL statements from which to select, click the flashlight icon. Examples are:
|
|
Audited By |
Choose the category of users to audit:
|
|
Statement Execution Condition |
Choose the execution condition:
|
|
DML Audit Granularity |
Choose the level of granularity:
|
Schema object auditing is the auditing of specific statements on a particular schema object, such as AUDIT SELECT ON HR.EMPLOYEES. Schema object auditing is very focused, auditing only a specific statement on a specific schema object for all users of the database.
For example, object auditing can audit all SELECT and DML statements permitted by object privileges, such as SELECT or DELETE statements on a given table. The GRANT and REVOKE statements that control those privileges are also audited.
Object auditing lets you audit the use of powerful database commands that enable users to view or delete very sensitive and private data. You can audit statements that reference tables, views, sequences, standalone stored procedures or functions, and packages.
Oracle Database and Oracle Audit Vault always set schema object audit options for all users of the database. You cannot set these options for a specific list of users.
To define a schema object audit policy:
If necessary, retrieve and activate the current object audit policies.
See Section 2.3 for more information.
In the Audit Settings page, select the Object tab to display the Object page.
Table 2-4 describes the fields used in the Object page.
Click the Create button and in the Create Object Audit page, define the audit policy.
Table 2-5 describes the Create Object Audit fields.
Click OK.
The object audit policy is created. To ensure that the object audit policy is semantically correct, see Section 2.9.
In the Overview page, select Save All Audit Settings.
To display the Overview page, click the Audit Settings link, and then in the Audit Settings page, select the name of the source database.
Table 2-4 lists the fields used in the Object page.
Table 2-4 Fields in the Object Page
| Field | Description |
|---|---|
|
(Leftmost column) |
An exclamation mark icon indicates one of the following conditions:
|
|
Statement |
The statement that is audited |
|
Schema |
The database schema to which this setting applies |
|
Object |
The object to which this setting applies |
|
Execution Condition |
The execution condition audited: |
|
Audit granularity |
The granularity of auditing: |
|
In Use |
The arrow points upward if the setting is active in the source database and downward if it has not been provisioned or is not active. |
|
Needed |
A check mark indicates that the policy is needed. An X indicates that the policy is not needed. If a policy that is not in use is set to needed, the In Use arrow points up after provisioning. If a policy that is in use is set to not needed, the audit policy is no longer displayed after provisioning. To select all policies as needed, click the Mark All as Needed button. To reverse this action, clickMark All as Not Needed. |
|
(Rightmost column) |
Click the trash can icon to remove the policy. You can use the trash can icon to remove the policy only if you had just created it and decided it was not required in the source database, or if it is not active in the source database. |
Table 2-5 lists the fields used in the Create Object Audit page.
Table 2-5 Fields in the Create Object Audit Page
| Field | Description |
|---|---|
|
Statements |
Select the SQL statements to audit. To display a list of SQL statements from which to select, click the flashlight icon. Examples are:
|
|
Object Type |
Select the type of object to audit, such as table. To display a list of object types and their audit sources from which to select, click the flashlight icon. Examples are:
|
|
Object |
Optional. Select the object to audit. To display a list of objects and their source databases from which to select, and to filter the list by audit source and object owner, click the flashlight icon. For example, if you entered |
|
Statement Execution Condition |
Choose the execution condition:
|
|
DML Audit Granularity |
Choose the level of granularity:
|
Privilege auditing is the auditing of SQL statements that use a system privilege. You can audit the use of any system privilege. Like statement auditing, privilege auditing can audit the activities of all database users or of only a specified list of users.
For example, if you enable AUDIT SELECT ANY TABLE, Oracle Database audits all SELECT tablename statements issued by users who have the SELECT ANY TABLE privilege. This type of auditing is very important for the Sarbanes-Oxley (SOX) Act compliance requirements. Sarbanes-Oxley and other compliance regulations require the privileged user be audited for inappropriate data changes or fraudulent changes to records.
Privilege auditing audits the use of powerful system privileges enabling corresponding actions, such as AUDIT CREATE TABLE. If you set both similar statement and privilege audit options, then only a single audit record is generated. For example, if the statement clause TABLE and the system privilege CREATE TABLE are both audited, then only a single audit record is generated each time a table is created. The statement auditing clause, TABLE, audits CREATE TABLE, ALTER TABLE, and DROP TABLE statements. However, the privilege auditing option, CREATE TABLE, audits only CREATE TABLE statements, because only the CREATE TABLE statement requires the CREATE TABLE privilege.
Privilege auditing does not occur if the action is already permitted by the existing owner and schema object privileges. Privilege auditing is triggered only if these privileges are insufficient, that is, only if what makes the action possible is a system privilege.
Privilege auditing is more focused than statement auditing for the following reasons:
It audits only a specific type of SQL statement, not a related list of statements.
It audits only the use of the target privilege.
To define a privilege audit policy:
If necessary, retrieve and activate the current privilege audit policies.
See Section 2.3 for more information.
In the Audit Settings page, select the Privilege tab to display the Privilege page.
Table 2-6 describes the fields used in the Privilege page.
Click the Create button and in the Create Privilege Audit page, define the privilege audit policy.
Table 2-7 describes the Create Privilege Audit fields.
Click OK.
The privilege audit policy is created. To ensure that the privilege audit policy is semantically correct, see Section 2.9.
In the Overview page, select Save All Audit Settings.
To display the Overview page, click the Audit Settings link, and then in the Audit Settings page, select the name of the source database.
Table 2-6 lists the fields used in the Privilege page.
Table 2-6 Fields in the Privilege Page
| Field | Description |
|---|---|
|
(Leftmost column) |
An exclamation mark icon indicates one of the following conditions:
|
|
Privilege |
The privilege that is audited |
|
User |
The user to which this setting applies |
|
Proxy User |
The proxy user for the database, if any |
|
Execution Condition |
The execution condition audited: |
|
Audit granularity |
The granularity of auditing: |
|
In Use |
The arrow points upward if the setting is active in the source database and downward if it has not been provisioned or is not active. |
|
Needed |
A check mark indicates that the policy is needed. An X indicates that the policy is not needed. If a policy that is not in use is set to needed, the In Use arrow points up after provisioning. If a policy that is in use is set to not needed, the audit policy is no longer displayed after provisioning. To select all policies as needed, click the Mark All as Needed button. To reverse this action, clickMark All as Not Needed. |
|
(Rightmost column) |
Click the trash can icon to remove the policy. You can use the trash can icon to remove the policy only if you had just created it and decided it was not required in the source database, or if it is not active in the source database. |
Table 2-7 lists the fields used in the Create Privilege Audit page.
Table 2-7 Fields in the Create Privilege Audit Page
| Field | Description |
|---|---|
|
Privilege |
Select the privilege to audit. To display a list of privileges from which to select, click the flashlight icon. Examples are:
|
|
Audited By |
Choose the category of users to audit:
|
|
Statement Execution Condition |
Choose the execution condition:
|
|
DML Audit Granularity |
Choose the level of granularity:
|
This section contains:
Fine-grained auditing (FGA) enables you to create a policy that defines specific conditions that must exist for the audit to occur. For example, fine-grained auditing lets you audit the following types of activities:
Accessing a table between 9 p.m. and 6 a.m. or on Saturday and Sunday
Using an IP address from outside the corporate network
Selecting or updating a table column
Modifying a value in a table column
A fine-grained audit policy provides granular auditing of select, insert, update, and delete operations. Furthermore, you reduce the amount of audit information generated by restricting auditing to only the conditions that you want to audit. This creates a more meaningful audit trail that supports compliance requirements. For example, a central tax authority can use fine-grained auditing to track access to tax returns to guard against employee snooping, with enough detail to determine what data was accessed. It is not enough to know that a specific user used the SELECT privilege on a particular table. Fine-grained auditing provides a deeper audit, such as when the user queried the table or the computer IP address of the user who performed the action.
When you define the fine-grained audit policy, you can target one or more specific columns, called a relevant column, to be audited if a condition is met. This feature enables you to focus on particularly important, sensitive, or privacy-related data to audit, such as the data in columns that hold credit card numbers, patient diagnoses, U.S. Social Security numbers, and so on. A relevant-column audit helps reduce the instances of false or unnecessary audit records, because the audit is triggered only when a particular column is referenced in the query.
You further can fine-tune the audit to specific columns and rows by adding a condition to the audit policy. For example, suppose you enter the following fields in the Create Fine Grained Audit page:
Condition: department_id = 50
Columns: salary, commission_pct
This setting audits anyone who tries to select data from the salary and commission_pct columns of employees in Department 50.
If you do not specify a relevant column, then Oracle Database applies the audit to all the columns in the table; that is, auditing occurs whenever any specified statement type affects any column, whether or not any rows are returned.
In a fine-grained audit policy, you can specify an event handler to process an audit event. The event handler provides flexibility in determining how to handle a triggering audit event. For example, it could write the audit event to a special audit table for further analysis, or it could send a pager or an e-mail alert to a security administrator. This feature enables you to fine-tune audit responses to appropriate levels of escalation.
For additional flexibility in implementation, you can employ a user-defined function to determine the policy condition, and identify a relevant column for auditing (audit column). For example, the function could allow unaudited access to any salary as long as the user is accessing data within the company, but specify audited access to executive-level salaries when they are accessed from outside the company.
To define a fine-grained auditing policy:
If necessary, retrieve and activate the current fine-grained auditing policies.
See Section 2.3 for more information.
In the Audit Settings page, select the FGA tab to display the FGA (fine-grained auditing) page.
Table 2-8 describes the fields used in the FGA page.
Click the Create button and in the Create Fine Grained Audit page, define the audit policy.
Table 2-9 describes the Create Fine Grained Audit fields.
Click OK.
The fine-grained audit policy is created. To ensure that the fine-grained audit policy is semantically correct, see Section 2.9.
In the Overview page, select Save All Audit Settings.
To display the Overview page, click the Audit Settings link, and then in the Audit Settings page, select the name of the source database.
Table 2-8 lists the fields used in the Fine-Grained Audit page.
Table 2-8 Fields in the Fine-Grained Audit Page
| Field | Description |
|---|---|
|
(Leftmost column) |
An exclamation mark icon indicates one of the following conditions:
|
|
Policy Name |
The name of this fine-grained audit policy |
|
Schema |
The schema to which this policy applies |
|
Object |
The object to which this policy applies |
|
Statement |
The SQL statement to which this policy applies. Values are:
|
|
Columns |
The database columns being audited, also referred to as the relevant columns. If this field is empty, all columns are audited. |
|
In Use |
The arrow points upward if the setting is active in the source database and downward if it has not been provisioned or is not active. |
|
Needed |
A check mark indicates that the policy is needed. An X indicates that the policy is not needed. If a policy that is not in use is set to needed, the In Use arrow points up after provisioning. If a policy that is in use is set to not needed, the audit policy is no longer displayed after provisioning. To select all policies as needed, click the Mark All as Needed button. To reverse this action, clickMark All as Not Needed. |
|
(Rightmost column) |
Click the trash can icon to remove the policy. You only can use the trash can icon to remove the policy if you had just created it and decided it was not required in the source database, or if it is not active in the source database. |
Table 2-9 lists the fields in the Create Fine-Grained Audit page.
Table 2-9 Fields in the Create Fine-Grained Audit Page
| Field | Description |
|---|---|
|
Policy Name |
Enter a name for this fine-grained audit policy. |
|
Audit Trail |
Select from one of the following audit trail types:
|
|
Object |
Select an object to audit (for example |
|
Statements |
Select one or more SQL statements to audit. To display a list of statements from which to choose, click the flashlight icon. Select from the following SQL statements:
|
|
Columns |
Optional. Enter the names of the database columns (relevant columns) to audit. Separate each column name with a comma. If you enter more than one column, select All or Any as the condition that triggers this policy. For example, assuming you selected the CUSTOMER_ID, CREDIT_LIMIT, DATE_OF_BIRTH See Section 2.7.1.1 for more information about relevant columns. |
|
Condition |
Optional. Enter a Boolean condition to filter row data. For example: department_id = 50 If this field is blank or null, auditing occurs regardless of condition. |
|
Handler Schema |
Mandatory if you specify an event handler. Enter the name of the schema account in which the event handler was created. For example: SEC_MGR See Section 2.7.1.2 for more information about event handlers. |
|
Handler Package |
Mandatory if you specify an event handler. Enter the name of the package in which the event handler was created. For example: OE_FGA_POLICIES |
|
Handler |
Optional. Enter the name of the event handler. For example: CHECK_OE_VIOLATIONS If you specify an event handler, then specify its schema and package as well. |
You can create a capture rule to track changes in the database redo log files. The capture rule specifies DML and DDL changes that should be checked when Oracle Database scans the database redo log. You can apply the capture rule to an individual table, a schema, or globally to the entire database. Unlike statement, object, privilege, and fine-grained audit policies, you do not retrieve and activate capture rule settings from a source database, because you cannot create them there. You only can create the capture rule in the Audit Vault Console.
In the source database, ensure that the table that you plan to use for the redo log file audit is not listed in the DBA_STREAMS_UNSUPPORTED data dictionary view. This is because the REDO collector uses Oracle Streams and Oracle LogMiner to read the redo logs. If there is a column type that is unsupported, then Oracle Audit Vault cannot extract the before and after values from the table.
In the Audit Settings page, select the Capture Rule tab to display the Capture Rule page.
Table 2-10 describes the fields used in the Capture Rule page.
Click the Create button and in the Create Capture rule page, define the capture rule.
Table 2-11 describes the Create Capture Rule page fields.
Click OK.
The capture rule is created. To ensure that the capture rule is semantically correct, see Section 2.9.
In the Overview page, select Save All Audit Settings.
To display the Overview page, click the Audit Settings link, and then in the Audit Settings page, select the name of the source database.
Table 2-10 lists the fields used in the Capture Rule page.
Table 2-10 Fields in the Capture Rule Page
| Field | Description |
|---|---|
|
(Leftmost column) |
An exclamation mark icon indicates one of the following conditions:
|
|
Rule Type |
The types of capture rules are as follows:
|
|
Schema |
Indicates the schema to which this rule applies |
|
Table |
For table capture rules, this indicates the table to which this rule applies. |
|
DDL |
|
|
DML |
|
|
In Use |
The arrow points upward if the setting is active in the source database and downward if it has not been provisioned or is not active. |
|
Needed |
A check mark indicates that the policy is needed. An X indicates that the policy is not needed. If a policy that is not in use is set to needed, the In Use arrow points up after provisioning. If a policy that is in use is set to not needed, the audit policy is no longer displayed after provisioning. To select all policies as needed, click the Mark All as Needed button. To reverse this action, clickMark All as Not Needed. |
|
(Rightmost column) |
Click the trash can icon to remove the policy. You can use the trash can icon to remove the policy only if you had just created it and decided it was not required in the source database, or if it is not active in the source database. |
Table 2-11 lists the fields used in the Create Capture Rule page.
Table 2-11 Fields in the Create Capture Rule Page
| Field | Description |
|---|---|
|
Capture Rule |
Select from the following capture rule types:
|
|
Capture |
Select from the following:
|
After you have created an audit policy or capture rule, you can verify its semantic correctness.
In the Overview page, click the Audit Policy tab.
From within the Audit Vault Console, click the Database Instance link to display the Overview page.
Select the name of the source database.
The Apply Audit Settings section appears.
Select the audit settings types that you want to verify: Statement, Object, Privilege, FGA, or Capture Rule.
By default, all audit types are selected.
Click the Verify button.
The Audit Vault Console displays a message letting you know that the settings have been verified.
After you have created, verified, and saved the audit policies, you must export them to the source database. This ensures that the audit settings in the source database and Oracle Audit Vault are the same.
You can export the settings in the following ways:
Save the settings to a SQL script. Afterwards, give this script to your database administrator, who can apply the policies to the source database.
Provision the audit settings to the source database yourself. You can provision the settings if you have been granted EXECUTE privileges for the AUDIT SQL statement, the NOAUDIT SQL statement, and the DBMS_FGA PL/SQL package.
Caution:
Remember that the policies that you created in Oracle Audit Vault will disable policies that you did not retrieve earlier. Section 2.3.1 describes how to retrieve audit policies from a source Oracle database.After you export the audit settings to the source database, a database administrator can modify or delete audit policies. For this reason, you should periodically fetch the settings to ensure that you have the latest audit settings. Section 2.3 describes how to fetch audit settings.
To export the audit settings:
In the Overview page, click the Audit Policy tab.
From within the Audit Vault Console, click the Database Instance link to display the Overview page.
Select the name of the source database.
The Apply Audit Settings section appears.
Select from the audit settings types the audit settings that you want to export: Statement, Object, Privilege, FGA, or Capture Rule.
By default, all the audit settings types are selected.
Use one of the following methods to export the audit settings:
Exporting to a SQL file: Click Export as SQL to save the settings to a SQL script. In the Browse dialog field, select a location for the SQL file.
Provisioning to the source database: In the Audit Source User Name and Audit Source Password fields, enter the name and password of a user who has been granted EXECUTE privileges for the AUDIT SQL statement, the NOAUDIT SQL statement, and the DBMS_FGA PL/SQL package. Then click Provision.
You can copy audit policies from one Oracle database to another Oracle database that has been added to Oracle Audit Vault. You can copy policies that are already in use in the database or copy policies that you have created in Oracle Audit Vault but not yet applied to that database.
In the Overview page, click the Audit Policy tab.
From within the Audit Vault Console, click the Database Instance link to display the Overview page.
Select the name of the source database.
The Apply Audit Settings section appears.
Select from the audit settings types whose audit settings you want to copy: Statement, Object, Privilege, FGA, or Capture Rule.
By default, all the audit settings types are selected.
In the From field under Copy Audit Settings from Another Source, enter the name of a source database that is different from the currently used source database, or use the flashlight icon to select it from a list.
After Copy, select either of the following options:
Actual (In Use): Copies the settings listed in the In Use field under Apply Audit Settings.
Needed (Not Yet In Use): Copies the settings listed in the Needed field under Apply Audit Settings.
In the From field, enter the full name of the source database from which you want to copy, or use the flashlight icon to select its name from a list.
You can filter the source databases by source name, host name, and host IP address.
Click the Load button.
Click the Save All Audit Settings button.
Export the settings to a SQL file or provision the settings to the source database, using the procedure described in Section 2.10.
You can create and configure alerts for Oracle Database, Microsoft SQL Server, Sybase ASE, and IBM DB2 source databases. The alert is raised when the incoming audit data violates specific audit policies. You can specify an alert level, and associate the alert with the events described in Appendix A through Appendix D.
When an incoming audit record meets the specified condition, an alert is raised and placed in the alert store, where you can review it. Oracle Audit Vault updates the Overview page to reflect the alert data, and places the alert in an output queue within the Oracle Audit Vault database. An Oracle Audit Vault administrator can install software to read this queue and process the alert appropriately. Appropriate actions can include sending a page to a security officer or filing a trouble ticket within the appropriate tracking system. Oracle Audit Vault provides an example of an alert handler, which demonstrates actions taken as a result of alerts. The source files for this handler are in the $ORACLE_HOME/av/demo/alert directory. For more information, see the README.txt file in the alert directory.
Remember that alerts are raised when the audit data reaches the Oracle Audit Vault database, not when the actual action occurs. The time lag between when the action occurs and when the alert is raised depends on several factors, including how frequently the audit data collectors collect the audit records. An Oracle Audit Vault administrator can configure this frequency.
Alerts are independent of audit policies. That is, you do not need to perform the tasks described under Section 2.3 before you create an alert.
Note:
An Oracle Audit Vault administrator can disable alerts. If the alerts are not firing, then check with your administrator.When you create an alert, you categorize it as either a basic alert or an advanced alert. If you need to modify the alert later on, then you must drop it and then recreate it.
This section contains:
To create an alert rule:
Log in to the Audit Vault Console as a user who has been granted the AV_AUDITOR role.
Section 1.4 explains how to start the Audit Vault Console.
In the Audit Vault Console, select the Audit Policy tab, then select the Alerts tab.
The Audit Alerts page appears, which lists the existing alerts. You can use the Audit Source Type, Audit Source, and Audit Event Category fields or their flashlight icons to filter the list of existing alerts. To view the definition for an existing alert, select its name in the Alert Name field.
Click Create.
The Create Alert Rule page appears.
In the Alert field, enter the alert name and then in the Description field, enter a brief description of the alert.
Specify the following information: level of severity, source type, source, and event category for the alert.
Alert Severity: Select Warning or Critical.
Audit Source Type: Select one of the following audit source types:
SYBDB (for Sybase Adaptive Server Enterprise)
MSSQLDB (for Microsoft SQL Server)
ORCLDB (for Oracle Database)
DB2DB (for IBM DB2)
Audit Source: Select from the list of source databases based on the audit source type that you selected.
Audit Event Category: Select from the list of available categories based on the audit source type that you selected. For detailed information about the audit events for these categories, see the following appendixes:
For the alert conditions, select either Basic or Advanced. Then go to the following sections:
Section 2.12.2.2 to configure a basic alert condition
Section 2.12.2.3 configure an advanced alert condition
Click OK.
After you create alert rules, you can monitor the alert activity from the Overview page. See Section 2.12.3 for more information.
Table 2-12 lists the basic alert condition fields in the Basic Alert Condition section of the Create Alert Rule page.
Table 2-12 Fields in the Basic Alert Condition Section
| Field | Description |
|---|---|
|
User |
Specify the name of one or more users or click the flashlight icon to search for and select user names. |
|
Table |
Specify the name of one or more tables or click the flashlight icon to search for and select table names. |
|
Audit Event |
Select the name of an audit event from the list. The audit events that appear are based on the audit event category that you selected. See the following appendixes for more information about audit events: |
|
Audit Event Status |
Select an option to represent whether the event has a status of Success, Failure, or Both. |
In the Advanced Alert Condition section of the Create Alert Rule page, you construct the Boolean condition for when this alert should be evaluated. When audit data violates the Boolean condition, Oracle Audit Vault raises the alert.
Figure 2-1 shows the Advanced Alert Condition section.
Figure 2-1 Create Alert Rule Page, Advanced Alert Condition
For example,
To construct a Boolean condition:
From the Select an event to insert in the condition list, select an event.
The event appears in the Condition field with its associated event ID. For example, suppose you wanted to prevent non-OS users from logging in to an Oracle database. From the Audit Event Category list, you would select USER SESSION. Then from the Select an event to insert it in the condition list, you select LOGON. Oracle Audit Vault then adds the following event code for logons to the Condition field:
SOURCE_EVENTID = '100'
(Appendix A through Appendix D describe the event codes in detail.)
From the Select an attribute to insert in the condition list, select an attribute.
For this example, you select OSUSER_NAME, which Oracle Audit Vault adds to the Condition field. At this stage, the Condition field appears as follows:
SOURCE_EVENTID = '100' OSUSER_NAME
Edit the event and attribute to create a Boolean condition.
For this example, you must insert != after '100' to create a valid expression.
For example:
SOURCE_EVENTID = '100' != OSUSER_NAME
This alert says, "Raise an error if anyone other than the OS user tries to log in to the database."
Click OK.
The Overview page is the home page for auditors to view alert summaries, drill down to reports, and view agent and collector status. To display the Overview page, select the Home tab.
When an audit record is generated, Oracle Audit Vault classifies it into the event category that you specified when you created the alert. Audit event activity is monitored by the event category to which the audit record belongs. For example, a Logon event belongs to the User Session event category.
Oracle Audit Vault raises an alert when data in a single audit record matches an alert rule condition. Alerts are grouped by the sources with which they are associated, by the event category to which the event belongs, and by the severity level of the alert (warning or critical).
Figure 2-2 shows the Overview page.
From the Overview page, you can:
Select an event start time and end time in which to view Audit Vault event data. You can specify a time period by month, week, or day time span or the period between a specified begin and end date.
View five types of graphical summaries (pie charts and bar graphs) of alert activity and event activity over the specified time period. These graphical summaries include:
Alert Severity Summary (pie chart)
Click a section in this pie chart to drill down to a more detailed critical or warning alert report to see what sources are showing a particular severity level. See Section 3.7 for more information about critical and warning alert reports.
Summary of Alert Activity (pie chart)
Click a section in this pie chart to find critical and warning alerts to see the affected sources for all alert activity.
Top Five Audit Sources by Number of Alerts (bar graph)
Click a bar in this bar graph to find more detailed critical and warning alert information that shows a severity level for a particular source.
Alerts by Audit Event Category frequency (number of alerts) (bar graph)
Click an event category link in this bar graph to drill down to see more detailed critical and warning alert information that shows all alerts for that event category.
Activity by Audit Event Category frequency (number of events) (bar graph)
Click an event category link in this bar graph to find events for that event category. You can generate default reports for these event categories. See Chapter 3, "Using Oracle Audit Vault Reports" for more information.
Click a pie section or bar chart y-axis event category label to drill down to a more detailed report level.
You can set a period of 1 to 99 years for Oracle Audit Vault to retain audit data. By default, Oracle Audit Vault retains collected audit data for 10 years. When you set this retention period, it applies to audit records from all source databases, not just the currently selected source database. Oracle Audit Vault deletes the data based on the time that it was collected by Oracle Audit Vault, not when the audit event actually occurred. For example, suppose you load audit data that is more than 10 years old and then you set the retention period to 7 years. Oracle Audit Vault will delete this audit data 7 years from now.
To set the audit data retention period:
Log in to the Audit Vault Console as a user who has been granted the AV_AUDITOR role.
Section 1.4 explains how to start the Audit Vault Console. The Overview page appears.
In the Audit Vault Console, select the Audit Policy tab.
By default, the Audit Settings page appears.
Under Audit Data Retention, enter a value (1–99) in the Retain audit data field.
Click Go.
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