STIGQter: STIG Summary: Microsoft Excel 2010 Version: 1 Release: 11 Benchmark Date: 27 Apr 2018:

File types must be configured to provide mismatch warnings.

DISA Rule

SV-33440r1_rule

Vulnerability Number

V-17621

Group Title

DTOO143 - Force File Extension to match type

Rule Version

DTOO143 - Excel

Severity

CAT II

CCI(s)

• CCI-001243 - The organization configures malicious code protection mechanisms to perform organization-defined action(s) in response to malicious code detection.

Weight

10

Fix Recommendation

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2010 -> Excel Options -> Security “Force file extension to match file type” to “Enabled (Allow different, but warn)”.

Check Contents

The policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2010 -> Excel Options -> Security “Force file extension to match file type” must be set to “Enabled (Allow different, but warn)”.

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\14.0\excel\security

Criteria: If the value ExtensionHardening is REG_DWORD = 1, this is not a finding.

Vulnerability Number

V-17621

Documentable

False

Rule Version

DTOO143 - Excel

Severity Override Guidance

The policy value for User Configuration -> Administrative Templates -> Microsoft Excel 2010 -> Excel Options -> Security “Force file extension to match file type” must be set to “Enabled (Allow different, but warn)”.

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\14.0\excel\security

Criteria: If the value ExtensionHardening is REG_DWORD = 1, this is not a finding.

Check Content Reference

M

Responsibility

Information Assurance Officer

Target Key

2021

Comments