Title

Documents must be configured to not open as Read Write when browsing. (Cat II impact)

Discussion

Office document on a Web server using Internet Explorer, the appropriate application opens the file in read-only mode. However, if the default configuration is changed, the document is opened as read/write. Users could potentially make changes to documents and resave them in situations where the Web server security is not configured to prevent such changes.

Check Content

The policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Tools \ Options \ General \ Web Options... -> Files “Open Office documents as read/write while browsing” must be set to “Disabled”. Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\common\internet Criteria: If the value OpenDocumentsReadWriteWhileBrowsing is REG_DWORD = 0, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Office 2010 -> Tools \ Options \ General \ Web Options... -> Files “Open Office documents as read/write while browsing” to “Disabled”.

Additional Identifiers

Rule ID: SV-33480r1_rule

Vulnerability ID: V-17759

Group Title: DTOO179 - Open as Read/Write when browsing

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.