Windows Server 2022 users must be notified if a web-based program attempts to install software.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-254375	WN22-CC-000440	SV-254375r848941_rule		Medium

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.

STIG	Date
Microsoft Windows Server 2022 Security Technical Implementation Guide	2022-08-25

Details

Check Text ( C-57860r848939_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_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\ Value Name: SafeForScripting Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Check Text ( C-57860r848939_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_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\

Value Name: SafeForScripting

Value Type: REG_DWORD
Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix Text (F-57811r848940_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".

Fix Text (F-57811r848940_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".