Unauthorized registry paths and sub-paths are remotely accessible.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-4443	3.108	SV-29732r1_rule		High

Description
The registry is a database for computer configuration information, much of which is sensitive. An attacker could use this to facilitate unauthorized activities. To reduce the risk of this happening, it is also lowered by the fact that the default ACLs assigned throughout the registry are fairly restrictive and they help to protect it from access by unauthorized users.

STIG	Date
Windows 2008 Domain Controller Security Technical Implementation Guide	2019-01-16

Details

Check Text ( C-347r1_chk )
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 “Network access: Remotely accessible registry paths and sub-paths” contains entries besides the following, then this is a finding: Software\Microsoft\OLAP Server Software\Microsoft\Windows NT\CurrentVersion\Perflib Software\Microsoft\Windows NT\CurrentVersion\Print Software\Microsoft\Windows NT\CurrentVersion\Windows System\CurrentControlSet\Control\ContentIndex System\CurrentControlSet\Control\Print\Printers System\CurrentControlSet\Control\Terminal Server System\CurrentControlSet\Control\Terminal Server\UserConfig System\CurrentControlSet\Control\Terminal Server\DefaultUserConfiguration System\CurrentControlSet\Services\Eventlog System\CurrentControlSet\Services\Sysmonlog The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Control\SecurePipeServers\Winreg\AllowedPaths\ Value Name: Machine Value Type: REG_MULTI_SZ Value: As defined in policy above Note: Legitimate applications may add entries to this registry value. If an application requires these entries to function properly and is documented with the IAO, this would not be a finding. Documentation should contain supporting information from the vendor's instructions.

Check Text ( C-347r1_chk )

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 “Network access: Remotely accessible registry paths and sub-paths” contains entries besides the following, then this is a finding:

Software\Microsoft\OLAP Server
Software\Microsoft\Windows NT\CurrentVersion\Perflib
Software\Microsoft\Windows NT\CurrentVersion\Print
Software\Microsoft\Windows NT\CurrentVersion\Windows
System\CurrentControlSet\Control\ContentIndex
System\CurrentControlSet\Control\Print\Printers
System\CurrentControlSet\Control\Terminal Server
System\CurrentControlSet\Control\Terminal Server\UserConfig
System\CurrentControlSet\Control\Terminal Server\DefaultUserConfiguration
System\CurrentControlSet\Services\Eventlog
System\CurrentControlSet\Services\Sysmonlog

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \System\CurrentControlSet\Control\SecurePipeServers\Winreg\AllowedPaths\

Value Name: Machine

Value Type: REG_MULTI_SZ
Value: As defined in policy above

Note: Legitimate applications may add entries to this registry value. If an application requires these entries to function properly and is documented with the IAO, this would not be a finding. Documentation should contain supporting information from the vendor's instructions.

Fix Text (F-5739r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Network access: Remotely accessible registry paths and sub-paths” as specified in the Check section.