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Hardens FlatPress via HTTP response header

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Fixes #146

Can be optionally activated by the FlatPress admin

 * Content Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources for approved content, you can prevent the browser from loading malicious content.
 * Permissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
 * HTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
 * The X-Download-Options response header instructs the browser not to open the file directly but to offer it for download first. This mitigates some potential Social Engineering attacks.
 * HTTP Strict Transport Security (HSTS for short) is a security mechanism for HTTPS connections that protects against both connection encryption downgrade attack and session hijacking.
 * The referrer policy directive determines whether, and if so which, referrer information for requests triggered by the current web page is sent by the web browser in HTTP requests.
This commit is contained in:
Fraenkiman 2023-03-01 00:59:25 +01:00
parent b60a51cf92
commit 9837c76692
3 changed files with 40 additions and 0 deletions
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1
defaults.php
View File

@ -124,6 +124,7 @@ $serverport = "false";
// Unterstützung für Apache und IIS
ini_set('session.cookie_secure', 1);
ini_set('session.cookie_httponly', 1);
ini_set('session.cookie_samesite', 'Lax');
if (isset($_SERVER ['HTTPS']) && ($_SERVER ['HTTPS'] == '1' || strtolower($_SERVER ['HTTPS']) == 'on')) {
$serverport = "https://";
} else {

16
fp-plugins/fpprotect/doc_fpprotect.txt Normal file
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@ -0,0 +1,16 @@
FlatPress Protect
=================
Description
-----------
Protect your blog with additional fetures in the HTTP response header
* Content Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources for approved content, you can prevent the browser from loading malicious content.
* Permissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
* HTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
* The X-Download-Options response header instructs the browser not to open the file directly but to offer it for download first. This mitigates some potential Social Engineering attacks.
* HTTP Strict Transport Security (HSTS for short) is a security mechanism for HTTPS connections that protects against both connection encryption downgrade attack and session hijacking.
* The referrer policy directive determines whether, and if so which, referrer information for requests triggered by the current web page is sent by the web browser in HTTP requests.
Here you can check the security of your Flatpress blog
https://securityheaders.com/

23
fp-plugins/fpprotect/plugin.fpprotect.php Normal file
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@ -0,0 +1,23 @@
<?php
/*
* Plugin Name: FlatPress Protect
* Plugin URI: http://www.flatpress.org/
* Description: Protect your blog with additional fetures in the HTTP response header. <a href="./fp-plugins/fpprotect/doc_fpprotect.txt" title="More information" target="_blank">[More information]</a>
* Author: FlatPress
* Version: 1.0
* Author URI: https://www.flatpress.org
*/
// Content Security Policy rules for Youtube, Facebook and Vimeo embedded video / BBCode [video], embedded OSM
header('Content-Security-Policy: default-src \'self\';frame-src \'self\' youtube-nocookie.com www.youtube-nocookie.com facebook.com www.facebook.com player.vimeo.com data:; base-uri \'self\'; font-src \'self\' data:; script-src \'self\' \'unsafe-inline\' \'unsafe-eval\' connect.facebook.net player.vimeo.com blob:; style-src \'self\' \'unsafe-inline\' openlayers.org; img-src \'self\' openlayers.org tile.openstreetmap.org data: blob:; frame-ancestors \'self\'; manifest-src \'self\'; worker-src \'self\' blob:; connect-src \'self\' openlayers.org blob:; media-src \'self\' blob:; child-src \'self\' blob:; form-action \'self\';');
header('X-Content-Security-Policy: default-src \'self\';frame-src \'self\' youtube-nocookie.com www.youtube-nocookie.com facebook.com www.facebook.com player.vimeo.com data:; base-uri \'self\'; font-src \'self\' data:; script-src \'self\' \'unsafe-inline\' \'unsafe-eval\' connect.facebook.net player.vimeo.com blob:; style-src \'self\' \'unsafe-inline\' openlayers.org; img-src \'self\' openlayers.org tile.openstreetmap.org data: blob:; frame-ancestors \'self\'; manifest-src \'self\'; worker-src \'self\' blob:; connect-src \'self\' openlayers.org blob:; media-src \'self\' blob:; child-src \'self\' blob:; form-action \'self\';');
header('X-WebKit-CSP: default-src \'self\';frame-src \'self\' youtube-nocookie.com www.youtube-nocookie.com facebook.com www.facebook.com player.vimeo.com data:; base-uri \'self\'; font-src \'self\' data:; script-src \'self\' \'unsafe-inline\' \'unsafe-eval\' connect.facebook.net player.vimeo.com blob:; style-src \'self\' \'unsafe-inline\' openlayers.org; img-src \'self\' openlayers.org tile.openstreetmap.org data: blob:; frame-ancestors \'self\'; manifest-src \'self\'; worker-src \'self\' blob:; connect-src \'self\' openlayers.org blob:; media-src \'self\' blob:; child-src \'self\' blob:; form-action \'self\';');
// End of Content Security Policy rules
header('Feature-Policy: interest-cohort \'none\'; autoplay \'self\'; camera \'self\'; fullscreen \'self\'; geolocation \'self\'; microphone \'self\'; payment \'none\';'); // Goodbye Feature Policy! // thx Nextcloud-Maps-App, github.com/nextcloud
header('Permissions-Policy: interest-cohort=(), autoplay=(self), camera=(self), fullscreen=(self), geolocation=(self), microphone=(self), payment=(),'); // Hello Permissions Policy! // thx Nextcloud-Maps-App, github.com/nextcloud
header('Referrer-Policy: strict-origin-when-cross-origin');
header('Strict-Transport-Security: max-age=15552000; includeSubDomains');
header('X-Permitted-Cross-Domain-Policies: none');
header('X-Download-Options: noopen');
?>