Merge pull request #4862 from pi-hole/tweak/lighttpd_headers

Add security-related headers to Pi-hole web interface

2 files changed, 26 insertions, 4 deletions

diff --git a/advanced/lighttpd.conf.debian b/advanced/lighttpd.conf.debian
index 4231a0c9..4545bb2e 100644
--- a/advanced/lighttpd.conf.debian
+++ b/advanced/lighttpd.conf.debian
@@ -78,10 +78,21 @@ include_shell "find /etc/lighttpd/conf-enabled -name '*.conf' -a ! -name 'letsen
 
 # If the URL starts with /admin, it is the Web interface
 $HTTP["url"] =~ "^/admin/" {
-    # Create a response header for debugging using curl -I
+    # X-Pi-hole is a response header for debugging using curl -I
+    # X-Frame-Options prevents clickjacking attacks and helps ensure your content is not embedded into other sites via < frame >, < iframe > or < object >.
+    # X-XSS-Protection sets the configuration for the cross-site scripting filters built into most browsers. This is important because it tells the browser to block the response if a malicious script has been inserted from a user input.
+    # X-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. This is important because the browser will only load external resources if their content-type matches what is expected, and not malicious hidden code.
+    # Content-Security-Policy tells the browser where resources are allowed to be loaded and if it’s allowed to parse/run inline styles or Javascript. This is important because it prevents content injection attacks, such as Cross Site Scripting (XSS).
+    # X-Permitted-Cross-Domain-Policies is an XML document that grants a web client, such as Adobe Flash Player or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
+    # Referrer-Policy allows control/restriction of the amount of information present in the referral header for links away from your page—the URL path or even if the header is sent at all.
     setenv.add-response-header = (
         "X-Pi-hole" => "The Pi-hole Web interface is working!",
-        "X-Frame-Options" => "DENY"
+        "X-Frame-Options" => "DENY",
+        "X-XSS-Protection" => "1; mode=block",
+        "X-Content-Type-Options" => "nosniff",
+        "Content-Security-Policy" => "default-src 'self' 'unsafe-inline';",
+        "X-Permitted-Cross-Domain-Policies" => "none",
+        "Referrer-Policy" => "same-origin"
     )
 }
 
diff --git a/advanced/lighttpd.conf.fedora b/advanced/lighttpd.conf.fedora
index c3c94986..12930302 100644
--- a/advanced/lighttpd.conf.fedora
+++ b/advanced/lighttpd.conf.fedora
@@ -86,10 +86,21 @@ fastcgi.server = (
 
 # If the URL starts with /admin, it is the Web interface
 $HTTP["url"] =~ "^/admin/" {
-    # Create a response header for debugging using curl -I
+    # X-Pi-hole is a response header for debugging using curl -I
+    # X-Frame-Options prevents clickjacking attacks and helps ensure your content is not embedded into other sites via < frame >, < iframe > or < object >.
+    # X-XSS-Protection sets the configuration for the cross-site scripting filters built into most browsers. This is important because it tells the browser to block the response if a malicious script has been inserted from a user input.
+    # X-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. This is important because the browser will only load external resources if their content-type matches what is expected, and not malicious hidden code.
+    # Content-Security-Policy tells the browser where resources are allowed to be loaded and if it’s allowed to parse/run inline styles or Javascript. This is important because it prevents content injection attacks, such as Cross Site Scripting (XSS).
+    # X-Permitted-Cross-Domain-Policies is an XML document that grants a web client, such as Adobe Flash Player or Adobe Acrobat (though not necessarily limited to these), permission to handle data across domains.
+    # Referrer-Policy allows control/restriction of the amount of information present in the referral header for links away from your page—the URL path or even if the header is sent at all.
     setenv.add-response-header = (
         "X-Pi-hole" => "The Pi-hole Web interface is working!",
-        "X-Frame-Options" => "DENY"
+        "X-Frame-Options" => "DENY",
+        "X-XSS-Protection" => "1; mode=block",
+        "X-Content-Type-Options" => "nosniff",
+        "Content-Security-Policy" => "default-src 'self' 'unsafe-inline';",
+        "X-Permitted-Cross-Domain-Policies" => "none",
+        "Referrer-Policy" => "same-origin"
     )
 }