UCF STIG Viewer Logo
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

Configure Kerberos encryption types.


Overview

Finding ID Version Rule ID IA Controls Severity
V-21954 3.154 SV-25277r1_rule ECSC-1 Medium
Description
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 2015-03-09

Details

Check Text ( C-26839r1_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, then 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
Subkey: \Sofware\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters\

Value Name: SupportedEncryptionTypes

Type: REG_DWORD
Value: 0x7ffffffc (2147483644)
Fix Text (F-22943r1_fix)
Configure the policy value for “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