A Windows system has an incorrect default DCOM authorization level.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-6825	5.107	SV-29736r2_rule		Medium

Description
The DCOM default authentication level has been detected to be below the required setting. If the authentication level is None, then any user can access any object on the system without authentication.

STIG	Date
Windows Vista Security Technical Implementation Guide	2017-01-30

Details

Check Text ( C-40668r1_chk )
Open a command prompt. Execute “Dcomcnfg.exe”. In the “Component Services” window, navigate to Component Services -> Computer -> My Computer Right-click “My Computer” and select “Properties”. Select the “Default Properties” tab. If the “Default Authentication Level” is set to “None” or “Call”, this is a finding.

Fix Text (F-36078r1_fix)
Fortify DCOMs default permissions. This should be thoroughly tested to verify DCOM objects continue to function under tightened security. Open a command prompt. Execute “Dcomcnfg.exe”. In the “Component Services” window, navigate to Component Services -> Computer -> My Computer Right-click “My Computer” and select “Properties”. Select the “Default Properties” tab. Select a “Default Authentication Level” other than “None” or “Call”. For sensitive systems, an authentication level of “Packet Privacy” is recommended. Click OK.

Fix Text (F-36078r1_fix)

Fortify DCOMs default permissions. This should be thoroughly tested to verify DCOM objects continue to function under tightened security.
Open a command prompt.
Execute “Dcomcnfg.exe”.
In the “Component Services” window, navigate to Component Services -> Computer -> My Computer
Right-click “My Computer” and select “Properties”.
Select the “Default Properties” tab.
Select a “Default Authentication Level” other than “None” or “Call”. For sensitive systems, an authentication level of “Packet Privacy” is recommended.
Click OK.