Check: WDNS-IA-000006
Microsoft Windows 2012 Server Domain Name System STIG:
WDNS-IA-000006
(in versions v2 r6 through v1 r13)
Title
The Windows 2012 DNS Server must be configured to enforce authorized access to the corresponding private key. (Cat II impact)
Discussion
The cornerstone of the PKI is the private key used to encrypt or digitally sign information. If the private key is stolen, this will lead to the compromise of the authentication and non-repudiation gained through PKI because the attacker can use the private key to digitally sign documents and pretend to be the authorized user. Both the holders of a digital certificate and the issuing authority must protect the computers, storage devices, or whatever they use to keep the private keys. SIG(0) is used for server-to-server authentication for DNS transactions, and it uses PKI-based authentication. So, in cases where SIG(0) is being used instead of TSIG (which uses a shared key, not PKI-based authentication), this requirement is applicable.
Check Content
Access Windows Explorer. Navigate to the following location: %ALLUSERSPROFILE%\Microsoft\Crypto Note: If the %ALLUSERSPROFILE%\Microsoft\Crypto folder doesn't exist, this is not applicable. Verify the permissions on the keys folder, sub-folders, and files are limited to SYSTEM and Administrators FULL CONTROL. If any other user or group has greater than READ privileges to the %ALLUSERSPROFILE%\Microsoft\Crypto folder, sub-folders and files, this is a finding.
Fix Text
Access Windows Explorer. Navigate to the following location: %ALLUSERSPROFILE%\Microsoft\Crypto Modify permissions on the keys folder, sub-folders, and files to be limited to SYSTEM and Administrators FULL CONTROL and to all other Users/Groups to READ.
Additional Identifiers
Rule ID: SV-215604r879613_rule
Vulnerability ID: V-215604
Group Title: SRG-APP-000176-DNS-000017
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000186 |
The information system, for PKI-based authentication, enforces authorized access to the corresponding private key. |
Controls
Number | Title |
---|---|
IA-5 (2) |
Pki-Based Authentication |