Azure SQL Database must generate audit records when unsuccessful logons or connection attempts occur.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-255369	ASQL-00-014800	SV-255369r879874_rule		Medium

Description
For completeness of forensic analysis, it is necessary to track failed attempts to log on to Azure SQL Database. While positive identification may not be possible in a case of failed authentication, as much information as possible about the incident must be captured.

STIG	Date
Microsoft Azure SQL Database Security Technical Implementation Guide	2023-06-12

Details

Check Text ( C-59042r871231_chk )
Review Azure SQL Database configuration to verify that audit records are produced when unsuccessful logons or connection attempts occur. To determine if an audit is configured, execute the following script. Run this TSQL command to determine if SQL Auditing AuditActionGroups are configured: SELECT DISTINCT sd.audit_action_name FROM sys.database_audit_specification_details sd JOIN sys.database_audit_specifications s ON s.database_specification_id = sd.database_specification_id WHERE (name = 'SqlDbAuditing_ServerAuditSpec' /Server Audit/ OR name = 'SqlDbAuditing_AuditSpec') /Database Audit/ AND s.is_state_enabled = 1 ORDER BY sd.audit_action_name If no values exist for AuditActionGroup, this is a finding. Verify the following AuditActionGroup(s) are configured: FAILED_DATABASE_AUTHENTICATION_GROUP If any listed AuditActionGroups do not exist in the configuration, this is a finding.

Check Text ( C-59042r871231_chk )

Review Azure SQL Database configuration to verify that audit records are produced when unsuccessful logons or connection attempts occur.

To determine if an audit is configured, execute the following script.
Run this TSQL command to determine if SQL Auditing AuditActionGroups are configured:
SELECT DISTINCT sd.audit_action_name
FROM sys.database_audit_specification_details sd
JOIN sys.database_audit_specifications s
ON s.database_specification_id = sd.database_specification_id
WHERE (name = 'SqlDbAuditing_ServerAuditSpec' /*Server Audit*/
OR name = 'SqlDbAuditing_AuditSpec') /*Database Audit*/
AND s.is_state_enabled = 1
ORDER BY sd.audit_action_name

If no values exist for AuditActionGroup, this is a finding.

Verify the following AuditActionGroup(s) are configured:
FAILED_DATABASE_AUTHENTICATION_GROUP

If any listed AuditActionGroups do not exist in the configuration, this is a finding.

Fix Text (F-58986r871232_fix)
Deploy an Azure SQL Database audit. Refer to the supplemental file "AzureSQLDatabaseAudit.txt" PowerShell script. Reference: https://docs.microsoft.com/en-us/powershell/module/az.sql/set-azsqlserveraudit">https://docs.microsoft.com/en-us/powershell/module/az.sql/set-azsqlserveraudit