Check: 3.092
Windows Vista STIG:
3.092
(in versions v6 r42 through v6 r41)
Title
The system must generate an audit event when the audit log reaches a percentage of full threshold. (Cat III impact)
Discussion
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.
Check Content
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
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.
Additional Identifiers
Rule ID: SV-29729r2_rule
Vulnerability ID: V-4108
Group Title: Audit Log Warning Level
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000139 |
The information system alerts designated organization-defined personnel or roles in the event of an audit processing failure. |
| CCI-001855 |
The information system provides a warning to organization-defined personnel, roles, and/or locations within an organization-defined time period when allocated audit record storage volume reaches an organization-defined percentage of repository maximum audit record storage capacity. |
| CCI-001858 |
The information system provides a real-time alert in an organization-defined real-time period to organization-defined personnel, roles, and/or locations when organization-defined audit failure events requiring real-time alerts occur. |