buildroot/package/janus-gateway/0003-Fix-potential-Cross-site-Scripting-XSS-exploits-in-demos.patch

From ba166e9adebfe5343f826c6a9e02299d35414ffd Mon Sep 17 00:00:00 2001
From: Lorenzo Miniero <lminiero@gmail.com>
Date: Thu, 25 Nov 2021 17:20:53 +0100
Subject: [PATCH] Fix potential Cross-site Scripting (XSS) exploits in demos
 (#2817)

[Retrieved (and backported) from:
https://github.com/meetecho/janus-gateway/commit/ba166e9adebfe5343f826c6a9e02299d35414ffd]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 html/audiobridgetest.js   | 17 +++++++++++++----
 html/recordplaytest.js    | 13 +++++++++++--
 html/screensharingtest.js | 11 ++++++++++-
 html/streamingtest.js     | 13 +++++++++++--
 html/textroomtest.js      | 23 ++++++++++++++---------
 html/videocalltest.js     | 15 ++++++++++++---
 html/videoroomtest.js     | 13 +++++++++++--
 html/vp9svctest.js        | 13 +++++++++++--
 8 files changed, 93 insertions(+), 25 deletions(-)

diff --git a/html/audiobridgetest.js b/html/audiobridgetest.js
index 18e1cc1839..f757789708 100644
--- a/html/audiobridgetest.js
+++ b/html/audiobridgetest.js
@@ -178,7 +178,7 @@ $(document).ready(function() {
 												Janus.debug("Got a list of participants:", list);
 												for(var f in list) {
 													var id = list[f]["id"];
-													var display = list[f]["display"];
+													var display = escapeXmlTags(list[f]["display"]);
 													var setup = list[f]["setup"];
 													var muted = list[f]["muted"];
 													var spatial = list[f]["spatial_position"];
@@ -222,7 +222,7 @@ $(document).ready(function() {
 												Janus.debug("Got a list of participants:", list);
 												for(var f in list) {
 													var id = list[f]["id"];
-													var display = list[f]["display"];
+													var display = escapeXmlTags(list[f]["display"]);
 													var setup = list[f]["setup"];
 													var muted = list[f]["muted"];
 													var spatial = list[f]["spatial_position"];
@@ -267,7 +267,7 @@ $(document).ready(function() {
 												Janus.debug("Got a list of participants:", list);
 												for(var f in list) {
 													var id = list[f]["id"];
-													var display = list[f]["display"];
+													var display = escapeXmlTags(list[f]["display"]);
 													var setup = list[f]["setup"];
 													var muted = list[f]["muted"];
 													var spatial = list[f]["spatial_position"];
@@ -429,7 +429,7 @@ function registerUsername() {
 			return;
 		}
 		var register = { request: "join", room: myroom, display: username };
-		myusername = username;
+		myusername = escapeXmlTags(username);
 		mixertest.send({ message: register});
 	}
 }
@@ -448,3 +448,12 @@ function getQueryStringValue(name) {
 		results = regex.exec(location.search);
 	return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 }
+
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
diff --git a/html/recordplaytest.js b/html/recordplaytest.js
index 74ee7bed95..52b5ccbc4c 100644
--- a/html/recordplaytest.js
+++ b/html/recordplaytest.js
@@ -423,11 +423,11 @@ function updateRecsList() {
 			Janus.debug("Got a list of available recordings:", list);
 			for(var mp in list) {
 				Janus.debug("  >> [" + list[mp]["id"] + "] " + list[mp]["name"] + " (" + list[mp]["date"] + ")");
-				$('#recslist').append("<li><a href='#' id='" + list[mp]["id"] + "'>" + list[mp]["name"] + " [" + list[mp]["date"] + "]" + "</a></li>");
+				$('#recslist').append("<li><a href='#' id='" + list[mp]["id"] + "'>" + escapeXmlTags(list[mp]["name"]) + " [" + list[mp]["date"] + "]" + "</a></li>");
 			}
 			$('#recslist a').unbind('click').click(function() {
 				selectedRecording = $(this).attr("id");
-				selectedRecordingInfo = $(this).text();
+				selectedRecordingInfo = escapeXmlTags($(this).text());
 				$('#recset').html($(this).html()).parent().removeClass('open');
 				$('#play').removeAttr('disabled').click(startPlayout);
 				return false;
@@ -545,3 +545,12 @@ function getQueryStringValue(name) {
 		results = regex.exec(location.search);
 	return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 }
+
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
diff --git a/html/screensharingtest.js b/html/screensharingtest.js
index 61eac70f43..c64d8dbd67 100644
--- a/html/screensharingtest.js
+++ b/html/screensharingtest.js
@@ -161,7 +161,7 @@ $(document).ready(function() {
 										if(event === "joined") {
 											myid = msg["id"];
 											$('#session').html(room);
-											$('#title').html(msg["description"]);
+											$('#title').html(escapeXmlTags(msg["description"]));
 											Janus.log("Successfully joined room " + msg["room"] + " with ID " + myid);
 											if(role === "publisher") {
 												// This is our session, publish our stream
@@ -514,3 +514,12 @@ function newRemoteFeed(id, display) {
 			}
 		});
 }
+
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
diff --git a/html/streamingtest.js b/html/streamingtest.js
index 7dd2e1f681..3f9937f11c 100644
--- a/html/streamingtest.js
+++ b/html/streamingtest.js
@@ -323,7 +323,7 @@ function updateStreamsList() {
 			Janus.debug(list);
 			for(var mp in list) {
 				Janus.debug("  >> [" + list[mp]["id"] + "] " + list[mp]["description"] + " (" + list[mp]["type"] + ")");
-				$('#streamslist').append("<li><a href='#' id='" + list[mp]["id"] + "'>" + list[mp]["description"] + " (" + list[mp]["type"] + ")" + "</a></li>");
+				$('#streamslist').append("<li><a href='#' id='" + list[mp]["id"] + "'>" + escapeXmlTags(list[mp]["description"]) + " (" + list[mp]["type"] + ")" + "</a></li>");
 			}
 			$('#streamslist a').unbind('click').click(function() {
 				selectedStream = $(this).attr("id");
@@ -345,7 +345,7 @@ function getStreamInfo() {
 	var body = { request: "info", id: parseInt(selectedStream) || selectedStream };
 	streaming.send({ message: body, success: function(result) {
 		if(result && result.info && result.info.metadata) {
-			$('#metadata').html(result.info.metadata);
+			$('#metadata').html(escapeXmlTags(result.info.metadata));
 			$('#info').removeClass('hide').show();
 		}
 	}});
@@ -394,6 +394,15 @@ function stopStream() {
 	simulcastStarted = false;
 }
 
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
+
 // Helpers to create Simulcast-related UI, if enabled
 function addSimulcastButtons() {
 	$('#curres').parent().append(
diff --git a/html/textroomtest.js b/html/textroomtest.js
index 082ae44905..3d0697e35a 100644
--- a/html/textroomtest.js
+++ b/html/textroomtest.js
@@ -153,9 +153,7 @@ $(document).ready(function() {
 									var what = json["textroom"];
 									if(what === "message") {
 										// Incoming message: public or private?
-										var msg = json["text"];
-										msg = msg.replace(new RegExp('<', 'g'), '&lt');
-										msg = msg.replace(new RegExp('>', 'g'), '&gt');
+										var msg = escapeXmlTags(json["text"]);
 										var from = json["from"];
 										var dateString = getDateString(json["date"]);
 										var whisper = json["whisper"];
@@ -170,9 +168,7 @@ $(document).ready(function() {
 										}
 									} else if(what === "announcement") {
 										// Room announcement
-										var msg = json["text"];
-										msg = msg.replace(new RegExp('<', 'g'), '&lt');
-										msg = msg.replace(new RegExp('>', 'g'), '&gt');
+										var msg = escapeXmlTags(json["text"]);
 										var dateString = getDateString(json["date"]);
 										$('#chatroom').append('<p style="color: purple;">[' + dateString + '] <i>' + msg + '</i>');
 										$('#chatroom').get(0).scrollTop = $('#chatroom').get(0).scrollHeight;
@@ -180,7 +176,7 @@ $(document).ready(function() {
 										// Somebody joined
 										var username = json["username"];
 										var display = json["display"];
-										participants[username] = display ? display : username;
+										participants[username] = escapeXmlTags(display ? display : username);
 										if(username !== myid && $('#rp' + username).length === 0) {
 											// Add to the participants list
 											$('#list').append('<li id="rp' + username + '" class="list-group-item">' + participants[username] + '</li>');
@@ -282,7 +278,7 @@ function registerUsername() {
 			username: myid,
 			display: username
 		};
-		myusername = username;
+		myusername = escapeXmlTags(username);
 		transactions[transaction] = function(response) {
 			if(response["textroom"] === "error") {
 				// Something went wrong
@@ -312,7 +308,7 @@ function registerUsername() {
 			if(response.participants && response.participants.length > 0) {
 				for(var i in response.participants) {
 					var p = response.participants[i];
-					participants[p.username] = p.display ? p.display : p.username;
+					participants[p.username] = escapeXmlTags(p.display ? p.display : p.username);
 					if(p.username !== myid && $('#rp' + p.username).length === 0) {
 						// Add to the participants list
 						$('#list').append('<li id="rp' + p.username + '" class="list-group-item">' + participants[p.username] + '</li>');
@@ -418,3 +414,12 @@ function getQueryStringValue(name) {
 		results = regex.exec(location.search);
 	return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 }
+
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
diff --git a/html/videocalltest.js b/html/videocalltest.js
index d1c1ab8d07..18ccbc2c47 100644
--- a/html/videocalltest.js
+++ b/html/videocalltest.js
@@ -148,7 +148,7 @@ $(document).ready(function() {
 										} else if(result["event"]) {
 											var event = result["event"];
 											if(event === 'registered') {
-												myusername = result["username"];
+												myusername = escapeXmlTags(result["username"]);
 												Janus.log("Successfully registered as " + myusername + "!");
 												$('#youok').removeClass('hide').show().html("Registered as '" + myusername + "'");
 												// Get a list of available peers, just for fun
@@ -163,7 +163,7 @@ $(document).ready(function() {
 												bootbox.alert("Waiting for the peer to answer...");
 											} else if(event === 'incomingcall') {
 												Janus.log("Incoming call from " + result["username"] + "!");
-												yourusername = result["username"];
+												yourusername = escapeXmlTags(result["username"]);
 												// Notify user
 												bootbox.hideAll();
 												incoming = bootbox.dialog({
@@ -213,7 +213,7 @@ $(document).ready(function() {
 												});
 											} else if(event === 'accepted') {
 												bootbox.hideAll();
-												var peer = result["username"];
+												var peer = escapeXmlTags(result["username"]);
 												if(!peer) {
 													Janus.log("Call started!");
 												} else {
@@ -598,6 +598,15 @@ function getQueryStringValue(name) {
 	return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 }
 
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
+
 // Helpers to create Simulcast-related UI, if enabled
 function addSimulcastButtons(temporal) {
 	$('#curres').parent().append(
diff --git a/html/videoroomtest.js b/html/videoroomtest.js
index 6a566891d8..5a3ade9be9 100644
--- a/html/videoroomtest.js
+++ b/html/videoroomtest.js
@@ -400,7 +400,7 @@ function registerUsername() {
 			ptype: "publisher",
 			display: username
 		};
-		myusername = username;
+		myusername = escapeXmlTags(username);
 		sfutest.send({ message: register });
 	}
 }
@@ -530,7 +530,7 @@ function newRemoteFeed(id, display, audio, video) {
 							}
 						}
 						remoteFeed.rfid = msg["id"];
-						remoteFeed.rfdisplay = msg["display"];
+						remoteFeed.rfdisplay = escapeXmlTags(msg["display"]);
 						if(!remoteFeed.spinner) {
 							var target = document.getElementById('videoremote'+remoteFeed.rfindex);
 							remoteFeed.spinner = new Spinner({top:100}).spin(target);
@@ -685,6 +685,15 @@ function getQueryStringValue(name) {
 	return results === null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
 }
 
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
+
 // Helpers to create Simulcast-related UI, if enabled
 function addSimulcastButtons(feed, temporal) {
 	var index = feed;
diff --git a/html/vp9svctest.js b/html/vp9svctest.js
index eca0239c32..b22ccf3340 100644
--- a/html/vp9svctest.js
+++ b/html/vp9svctest.js
@@ -387,7 +387,7 @@ function registerUsername() {
 			ptype: "publisher",
 			display: username
 		};
-		myusername = username;
+		myusername = escapeXmlTags(username);
 		sfutest.send({ message: register });
 	}
 }
@@ -486,7 +486,7 @@ function newRemoteFeed(id, display, audio, video) {
 							}
 						}
 						remoteFeed.rfid = msg["id"];
-						remoteFeed.rfdisplay = msg["display"];
+						remoteFeed.rfdisplay = escapeXmlTags(msg["display"]);
 						if(!remoteFeed.spinner) {
 							var target = document.getElementById('videoremote'+remoteFeed.rfindex);
 							remoteFeed.spinner = new Spinner({top:100}).spin(target);
@@ -630,6 +630,15 @@ function newRemoteFeed(id, display, audio, video) {
 		});
 }
 
+// Helper to escape XML tags
+function escapeXmlTags(value) {
+	if(value) {
+		var escapedValue = value.replace(new RegExp('<', 'g'), '&lt');
+		escapedValue = escapedValue.replace(new RegExp('>', 'g'), '&gt');
+		return escapedValue;
+	}
+}
+
 // Helpers to create SVC-related UI for a new viewer
 function addSvcButtons(feed) {
 	var index = feed;