3.154 - The use of DES encryption suites must not be allowed for Kerberos encryption.

Information

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.

Solution

Configure the policy 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

Options such as RC4_HMAC_MD5 may also be excluded to align with STIGs for later Windows versions. Changes should be thoroughly tested before implementing in a domain.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Windows_2008_R2_DC_V1R34_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-13, CAT|II, CCI|CCI-000803, CSCv6|16.14, Rule-ID|SV-32706r3_rule, STIG-ID|3.154, Vuln-ID|V-21954

Plugin: Windows

Control ID: 34e006f697d3bba64c83448c2e26203716588911888a40938e2503bf0da4dcd2