Digital signatures assigned to strongly named assemblies must be verified.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-225223	APPNET0031	SV-225223r615940_rule		Medium

Description
A strong name consists of the assembly's identity, simple text name, version number, and culture information (if provided)—plus a public key and a digital signature. Strong names serve to identify the author of the code. If digital signatures used to sign strong name assemblies are not verified, any self signed code can be impersonated. This can lead to a loss of system integrity.

STIG	Date
Microsoft DotNet Framework 4.0 Security Technical Implementation Guide	2020-12-11

Details

Check Text ( C-26922r467984_chk )
Use regedit to review the Windows registry key HKLM\Software\Microsoft\StrongName\Verification. There should be no assemblies or hash values listed under this registry key. If the StrongName\Verification key does not exist, this is not a finding. If there are assemblies or hash values listed in this key, each value represents a distinct application assembly that does not have the application strong name verified. If any assemblies are listed as omitting strong name verification in a production environment, this is a finding. If any assemblies are listed as omitting strong name verification in a development or test environment and the IAO has not provided documented approvals, this is a finding.

Check Text ( C-26922r467984_chk )

Use regedit to review the Windows registry key
HKLM\Software\Microsoft\StrongName\Verification.
There should be no assemblies or hash values listed under this registry key. If the StrongName\Verification key does not exist, this is not a finding.

If there are assemblies or hash values listed in this key, each value represents a distinct application assembly that does not have the application strong name verified.

If any assemblies are listed as omitting strong name verification in a production environment, this is a finding.

If any assemblies are listed as omitting strong name verification in a development or test environment and the IAO has not provided documented approvals, this is a finding.

Fix Text (F-26910r467985_fix)
Use regedit to remove the values stored in Windows registry key HKLM\Software\Microsoft\StrongName\Verification. There should be no assemblies or hash values listed under this registry key. All assemblies must require strong name verification in a production environment. Strong name assemblies that do not require verification in a development or test environment must have documented approvals from the IAO.

Fix Text (F-26910r467985_fix)

Use regedit to remove the values stored in Windows registry key HKLM\Software\Microsoft\StrongName\Verification. There should be no assemblies or hash values listed under this registry key.

All assemblies must require strong name verification in a production environment.

Strong name assemblies that do not require verification in a development or test environment must have documented approvals from the IAO.