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adobe.go
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adobe.go
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// Hardentools
// Copyright (C) 2017-2022 Security Without Borders
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"fmt"
"golang.org/x/sys/windows/registry"
)
var standardAdobeVersions = []string{
"DC", // Acrobat Reader DC.
"2020", // Acrobat Reader 2020
"XI", // Acrobat Reader XI (outdated)
}
// AdobeRegistryRegExSingleDWORD is the data type for a RegEx Path and
// Single Value DWORD combination.
type AdobeRegistryRegExSingleDWORD struct {
RootKey registry.Key
PathRegEx string
ValueName string
HardenedValue uint32
AdobeVersions []string
shortName string
longName string
description string
hardenByDefault bool
}
// AdobePDFJS hardens Acrobat JavaScript.
// bEnableJS possible values:
// 0 - Disable AcroJS
// 1 - Enable AcroJS
var AdobePDFJS = &AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\JSPrefs",
ValueName: "bEnableJS",
HardenedValue: 0, // Disable AcroJS
AdobeVersions: standardAdobeVersions,
shortName: "Adobe JavaScript",
longName: "Acrobat Reader JavaScript",
description: "Disables JavaScript in Acrobat Reader. PDF documents\n" +
"that use JavaScript code might not work as expected.",
hardenByDefault: true,
}
// AdobePDFObjects hardens Adobe Reader Embedded Objects.
// bAllowOpenFile set to 0 and
// bSecureOpenFile set to 1 to disable
// the opening of non-PDF documents
var AdobePDFObjects = &MultiHardenInterfaces{
hardenInterfaces: []HardenInterface{
&AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\Originals",
ValueName: "bAllowOpenFile",
HardenedValue: 0,
AdobeVersions: standardAdobeVersions,
shortName: "AdobePDFObjects_bAllowOpenFile",
},
&AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\Originals",
ValueName: "bSecureOpenFile",
HardenedValue: 1,
AdobeVersions: standardAdobeVersions,
shortName: "AdobePDFObjects_bSecureOpenFile",
},
},
shortName: "Adobe Objects",
longName: "Acrobat Reader Embedded Objects",
description: "Disables Acrobat Reader embedded objects. PDF documents\n" +
"that contain embedded files might not work as expected.",
hardenByDefault: true,
}
// AdobePDFProtectedMode switches on the Protected Mode setting under
// "Security (Enhanced)" (enabled by default in current versions).
// (HKEY_LOCAL_USER\Software\Adobe\Acrobat Reader<version>\Privileged -> DWORD „bProtectedMode“)
// 0 - Disable Protected Mode
// 1 - Enable Protected Mode
var AdobePDFProtectedMode = &AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\Privileged",
ValueName: "bProtectedMode",
HardenedValue: 1,
AdobeVersions: standardAdobeVersions,
shortName: "Adobe Protected Mode",
longName: "Acrobat Reader Protected Mode",
description: "Enables Acrobat Reader Protected Mode. This is already\n" +
"enabled by default in current Acrobat Reader versions.",
hardenByDefault: true,
}
// AdobePDFProtectedView switches on Protected View for all files from
// untrusted sources.
// (HKEY_CURRENT_USER\SOFTWARE\Adobe\Acrobat Reader\<version>\TrustManager -> iProtectedView)
// 0 - Disable Protected View
// 1 - Enable Protected View
var AdobePDFProtectedView = &AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\TrustManager",
ValueName: "iProtectedView",
HardenedValue: 1,
AdobeVersions: standardAdobeVersions,
shortName: "Adobe Protected View",
longName: "Acrobat Reader Protected View",
description: "Enables Acrobat Reader Protected View for all files from\n" +
"untrusted sources. In the Protected View mode,\n" +
"most features are disabled. You can view the PDF,\n" +
"but not do much else. In the Protected View, a yellow\n" +
"bar displays on top of the Reader window. Click\n" +
"Enable All Features to exit the Protected View.",
hardenByDefault: true,
}
// AdobePDFEnhancedSecurity switches on Enhanced Security setting under
// "Security (Enhanced)".
// (enabled by default in current versions)
// (HKEY_CURRENT_USER\SOFTWARE\Adobe\Acrobat Reader\DC\TrustManager -> bEnhancedSecurityInBrowser = 1 & bEnhancedSecurityStandalone = 1)
var AdobePDFEnhancedSecurity = &MultiHardenInterfaces{
shortName: "Adobe Enhanced Security",
longName: "Acrobat Reader Enhanced Security",
description: "Enables Acrobat Reader Enhanced Security. This is already\n" +
"enabled by default in current Acrobat Reader versions.",
hardenByDefault: true,
hardenInterfaces: []HardenInterface{
&AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\TrustManager",
ValueName: "bEnhancedSecurityInBrowser",
HardenedValue: 1,
AdobeVersions: standardAdobeVersions,
shortName: "AdobePDFEnhancedSecurity_bEnhancedSecurityInBrowser",
},
&AdobeRegistryRegExSingleDWORD{
RootKey: registry.CURRENT_USER,
PathRegEx: "SOFTWARE\\Adobe\\Acrobat Reader\\%s\\TrustManager",
ValueName: "bEnhancedSecurityStandalone",
HardenedValue: 1,
AdobeVersions: standardAdobeVersions,
shortName: "AdobePDFEnhancedSecurity_bEnhancedSecurityStandalone",
},
},
}
// Harden hardens / restores AdobeRegistryRegExSingleDWORD registry keys.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) Harden(harden bool) error {
// Harden.
for _, adobeVersion := range adobeRegEx.AdobeVersions {
path := fmt.Sprintf(adobeRegEx.PathRegEx, adobeVersion)
// Build a RegistrySingleValueDWORD so we can reuse the Harden() method.
var singleDWORD = &RegistrySingleValueDWORD{
RootKey: adobeRegEx.RootKey,
Path: path,
ValueName: adobeRegEx.ValueName,
HardenedValue: adobeRegEx.HardenedValue,
shortName: adobeRegEx.shortName,
longName: adobeRegEx.longName,
description: adobeRegEx.description,
}
// Call RegistrySingleValueDWORD Harden method to Harden or Restore.
err := singleDWORD.Harden(harden)
if err != nil {
return err
}
}
return nil
}
// IsHardened checks if AdobeRegistryRegExSingleDWORD is hardened.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) IsHardened() bool {
var hardened = true
for _, adobeVersion := range adobeRegEx.AdobeVersions {
path := fmt.Sprintf(adobeRegEx.PathRegEx, adobeVersion)
// Build a RegistrySingleValueDWORD so we can reuse the isHardened()
// method.
var singleDWORD = &RegistrySingleValueDWORD{
RootKey: adobeRegEx.RootKey,
Path: path,
ValueName: adobeRegEx.ValueName,
HardenedValue: adobeRegEx.HardenedValue,
shortName: adobeRegEx.shortName,
longName: adobeRegEx.longName,
description: adobeRegEx.description,
}
if !singleDWORD.IsHardened() {
hardened = false
}
}
return hardened
}
// Name returns name of hardening modulels.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) Name() string {
return adobeRegEx.shortName
}
// LongName returns LongName of hardening module.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) LongName() string {
return adobeRegEx.longName
}
// Description return description of hardening module.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) Description() string {
return adobeRegEx.description
}
// HardenByDefault returns if subject should be hardened by default.
func (adobeRegEx *AdobeRegistryRegExSingleDWORD) HardenByDefault() bool {
return adobeRegEx.hardenByDefault
}