Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The use of DES encryption suites must not be allowed for Kerberos encryption.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-21954 | 3.154 | SV-25277r2_rule | ECSC-1 | 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 |
|---|---|
| Windows 7 Security Technical Implementation Guide | 2015-09-02 |
Details
| Check Text ( C-60815r2_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 Security: Configure encryption types allowed for Kerberos" is not set to "Enabled" with only the following selected, this is a finding: RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types (If DES_CBC_CRC and DES_CBC_MD5 are selected, this is a finding) The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters\ Value Name: SupportedEncryptionTypes Type: REG_DWORD Value: 0x7ffffffc (2147483644) |
| Fix Text (F-65547r2_fix) |
|---|
| Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network Security: Configure encryption types allowed for Kerberos" to "Enabled" with only the following selected: RC4_HMAC_MD5 AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types |