Microsoft Windows Server 2019

Windows Server 2019 users must be notified if a web-based program attempts to install software

STIG ID: WN19-CC-000440 | SRG: SRG-OS-000480-GPOS-00227 | Severity: Medium | CCI: CCI-000366 | Vulnerability ID: V-205874

Description

Web-based programs may attempt to install malicious software on a system. Ensuring users are notified if a web-based program attempts to install software allows them to refuse the installation.

Check

C-6139r355984_chk

The default behavior is for Internet Explorer to warn users and select whether to allow or refuse installation when a web-based program attempts to install software on the system.If the registry value name below does not exist, this is not a finding.If it exists and is configured with a value of "0", this is not a finding.If it exists and is configured with a value of "1", this is a finding.Registry Hive: HKEY_LOCAL_MACHINERegistry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\Value Name: SafeForScriptingValue Type: REG_DWORDValue: 0x00000000 (0) (or if the Value Name does not exist)

Fix

F-6139r355985_fix

The default behavior is for Internet Explorer to warn users and select whether to allow or refuse installation when a web-based program attempts to install software on the system.If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Installer >> "Prevent Internet Explorer security prompt for Windows Installer scripts" to "Not Configured" or "Disabled".