sanitize-html库XSS漏洞分析与修复指南

漏洞概述 该漏洞涉及 库中的 XSS（跨站脚本攻击）漏洞。具体来说，漏洞存在于处理 和 标签时，未正确转义或过滤用户输入，导致攻击者可以通过构造恶意输入执行任意 JavaScript 代码。 影响范围 受影响版本： 库的特定版本（具体版本号未在截图中明确显示）。 影响场景：任何使用 库进行 HTML 内容 sanitization 的应用程序，特别是那些允许用户输入包含 或 标签的场景。 修复方案 1. 更新依赖： - 将 库更新到最新版本，以包含对 和 标签的安全处理。 - 更新 库到版本 或更高，以修复相关的 XSS 漏洞。 2. 代码修改： - 在 库中，对 和 标签的内容进行更严格的转义和过滤。 - 确保在处理这些标签时，不会将未转义的用户输入直接输出到 HTML 中。 3. 测试验证： - 运行现有的测试套件，确保修复后的代码不会引入新的问题。 - 添加新的测试用例，专门针对 和 标签的 XSS 漏洞进行验证。 POC 代码 以下是截图中提供的 POC 代码，用于演示如何利用该漏洞： ```javascript it('should handle sibling raw-text elements correctly without leaking states', function () { // htmlparser2 >= 11 treats as a raw-text element, so its inner // ... arrives as literal text and is escaped (insert) // rather than unwrapped. content is still parsed normally, so // if it's disallowed is dropped and only is kept. Either way // nothing executable leaks. assert.htmlEqual( sanitizeHtml('alert(1)body()'), 'alert(1)body()' ); }); it('should escape inside a nested directly in ', function () { // Original vulnerability: htmlparser2 or ) as closing a // raw-text element, so it kept everything after it as raw text. A // spec-compliant browser (htmlparser2 DOES treat as a // valid close, so any markup after it is parsed as a live element. Because // raw-text content was re-emitted without escaping, that smuggled live // markup passed through -- an allowedTags bypass / mutation-XSS. // // This is now defended at two layers, so the whole family of solidus // breakouts is inert: // 1. htmlparser2 >= 11 fixes the tokenization, so closes // the element and the trailing markup becomes a separate, // non-allowedList tag that is dropped (output ). // 2. sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration points such // as and ) to be namespace-aware and parses // and inside SVG/MathML as ordinary elements, so their // non-allowedList children (such as the injected ) are dropped by the // allowlist instead of being preserved as raw text; and any raw-text content // in sanitize-html still waits for these tags (at HTML integration point

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sanitize-html库XSS漏洞分析与修复指南

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sanitize-html库XSS漏洞分析与修复指南

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目标达成感谢每一位支持者 — 我们达成了 100% 目标！