Detections
Analytics

1.11 O365-CO-000008

Information

Office applications must be configured to specify encryption type in password-protected Office 97-2003 files.

GROUP ID: V-223291
RULE ID: SV-223291r961128

This policy setting enables you to specify an encryption type for password-protected Office 97-2003 files.

If you enable this policy setting, you can specify the type of encryption that Office applications will use to encrypt password-protected files in the older Office 97-2003 file formats. The chosen encryption type must have a corresponding cryptographic service provider (CSP) installed on the computer that encrypts the file. See the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Defaults\Provider\ registry key for a list of CSPs installed on the local computer. Specify the encryption type to use by entering it in the provided text box in the following form:

<Encryption Provider>,<Encryption Algorithm>,<Encryption Key Length>.
For example, Microsoft Enhanced Cryptographic Provider v1.0,RC4,128

If you do not configure this policy setting, Excel, PowerPoint, and Word use Office 97/2000 Compatible encryption, a proprietary encryption method, to encrypt password-protected Office 97-2003 files.

Solution

Set the policy value for

User Configuration >> Administrative Templates >> Microsoft Office 2016 >> Security Settings >> Encryption type for password protected Office 97-2003 files

to Microsoft Enhanced RSA and AES Cryptographic Provider,AES 256,256.

See Also

https://workbench.cisecurity.org/benchmarks/26066

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-28, CAT|II, CCI|CCI-001199, Rule-ID|SV-223291r961128_rule, STIG-ID|O365-CO-000008, Vuln-ID|V-223291

Plugin: Windows

Control ID: c579a3bc21c76a2f26a502590a0c7a60f78737d9d19fad7cab872f2c602a749c