The system must generate an audit event when the audit log reaches a percentage of full threshold.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4108	3.092	SV-29730r2_rule	ECRR-1	Low

Description
Audit records may be lost if the security log becomes full. When the audit log reaches a given percent full, an audit event is written to the security log. An event is recorded as a success audit under the category of System. This option may be especially useful if the audit logs are set to be cleared manually.

STIG	Date
Windows 2008 Domain Controller Security Technical Implementation Guide	2016-05-12

Details

Check Text ( C-59381r1_chk )
If the system is configured to send audit records directly to an audit server, or automatically archive full logs, this is NA. This must be documented with the ISSO. Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "MSS: (WarningLevel) Percentage threshold for the security event log at which the system will generate a warning" is not set to "90%" or less, this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Eventlog\Security\ Value Name: WarningLevel Value Type: REG_DWORD Value: 0x0000005a (90) (or less)

Check Text ( C-59381r1_chk )

If the system is configured to send audit records directly to an audit server, or automatically archive full logs, this is NA. This must be documented with the ISSO.
Analyze the system using the Security Configuration and Analysis snap-in.
Expand the Security Configuration and Analysis tree view.
Navigate to Local Policies -> Security Options.

If the value for "MSS: (WarningLevel) Percentage threshold for the security event log at which the system will generate a warning" is not set to "90%" or less, this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Services\Eventlog\Security\

Value Name: WarningLevel

Value Type: REG_DWORD
Value: 0x0000005a (90) (or less)

Fix Text (F-63893r1_fix)
If the system is configured to send audit records directly to an audit server, or automatically archive full logs, this is NA. This must be documented with the ISSO. Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (WarningLevel) Percentage threshold for the security event log at which the system will generate a warning" to "90%" or less.

Fix Text (F-63893r1_fix)

If the system is configured to send audit records directly to an audit server, or automatically archive full logs, this is NA. This must be documented with the ISSO.
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (WarningLevel) Percentage threshold for the security event log at which the system will generate a warning" to "90%" or less.