Kerberos encryption types must be configured to prevent the use of DES encryption suites.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-21954	WN12-SO-000064	SV-53179r1_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 Server 2012 / 2012 R2 Domain Controller Security Technical Implementation Guide	2014-07-09

Details

Check Text ( None )
None

Fix Text (F-46105r1_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

Fix Text (F-46105r1_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