From ebacda9b0c3cc88a4ad32276d4db6a2cdb198b69 Mon Sep 17 00:00:00 2001
From: Chris Brame <polonel@gmail.com>
Date: Thu, 6 Dec 2018 01:15:20 -0500
Subject: [PATCH] fix(crash): idle users array out-of-bounds

---
 src/socketserver.js | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/src/socketserver.js b/src/socketserver.js
index 388f6c45a..a004f48cb 100644
--- a/src/socketserver.js
+++ b/src/socketserver.js
@@ -628,11 +628,22 @@ var socketServer = function(ws) {
                     utils.sendToSelf(socket, '$trudesk:chat:updateOnlineBubbles', {sortedUserList: sortedUserList, sortedIdleList: sortedIdleList});
                 }
             } else {
-                idleUsers[user.username].sockets.push(socket.id);
-                sortedUserList = _.fromPairs(_.sortBy(_.toPairs(usersOnline), function(o) { return o[0]; }));
-                sortedIdleList = _.fromPairs(_.sortBy(_.toPairs(idleUsers), function(o) { return o[0]; }));
-
-                utils.sendToSelf(socket, '$trudesk:chat:updateOnlineBubbles', {sortedUserList: sortedUserList, sortedIdleList: sortedIdleList});
+                var idleUser = idleUsers[user.username.toLowerCase()];
+                if (!_.isUndefined(idleUser)) {
+                    idleUser.sockets.push(socket.id);
+
+                    sortedUserList = _.fromPairs(_.sortBy(_.toPairs(usersOnline), function (o) {
+                        return o[0];
+                    }));
+                    sortedIdleList = _.fromPairs(_.sortBy(_.toPairs(idleUsers), function (o) {
+                        return o[0];
+                    }));
+
+                    utils.sendToSelf(socket, '$trudesk:chat:updateOnlineBubbles', {
+                        sortedUserList: sortedUserList,
+                        sortedIdleList: sortedIdleList
+                    });
+                }
             }
         });