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Kerberos encryption types must be configured to prevent the use of DES encryption suites.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| WN12-SO-000064 | WN12-SO-000064 | WN12-SO-000064_rule | Medium |
| Description |
|---|
| Certain encryption types are no longer considered secure. This setting configures a minimum encryption type for Kerberos, preventing the use of the DES encryption suites. |
| STIG | Date |
|---|---|
| Microsoft Windows Server 2012 Domain Controller Security Technical Implementation Guide | 2013-07-25 |
Details
| Check Text ( C-WN12-SO-000064_chk ) |
|---|
| Verify that DES encryption types are not allowed for Kerberos. If the following registry value does not exist, this is not a finding: If the registry value does exist and is configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Sofware\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters\ Value Name: SupportedEncryptionTypes Type: REG_DWORD Value: 1, 2, or 3 are a finding. |
| Fix Text (F-WN12-SO-000064_fix) |
|---|
| The default configuration supports this requirement. If Kerberos encryption types must be configured, ensure that the following are not selected: DES_CBC_CRC DES_CBC_MD5 If the policy for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network security: Configure encryption types allowed for Kerberos" is configured, only the following selections are allowed: RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types |