redirect_uri misconfig

.gitignore

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+node_modules

LICENSE

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+MIT License
+
+Copyright (c) 2024 [caterpii]
+
+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.

caido.config.ts

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+import { defineConfig } from '@caido-community/dev';
+
+export default defineConfig({
+  id: "oauth-vuln-detector",
+  name: "OAuth Vuln Detector",
+  description: "Detects OAuth misconfiguration.",
+  version: "0.0.1",
+  author: {
+    name: "caterpii",
+    email: "dlaha171@gmail.com",
+    url: "https://github.com/katerpii"
+  },
+  plugins: [
+    {
+      kind: "backend",
+      id: "oauth-backend",
+      root: "packages/backend",
+    },
+  ],
+  watch: {
+    port: 8081, 
+  },
+}
+);

dist/plugin_package/manifest.json

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+{
+  "id": "oauth-vuln-detector",
+  "name": "OAuth Vuln Detector",
+  "version": "0.0.1",
+  "description": "Detects OAuth misconfiguration.",
+  "author": {
+    "name": "caterpii",
+    "email": "dlaha171@gmail.com",
+    "url": "https://github.com/katerpii"
+  },
+  "links": {},
+  "plugins": [
+    {
+      "id": "oauth-backend",
+      "kind": "backend",
+      "name": "backend",
+      "entrypoint": "oauth-backend/index.js",
+      "runtime": "javascript"
+    }
+  ]
+}

dist/plugin_package/oauth-backend/index.js

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+// packages/backend/src/index.ts
+import { promises as fs } from "fs";
+import * as path from "path";
+import os from "os";
+var requestMap = /* @__PURE__ */ new Map();
+function init(sdk) {
+  sdk.events.onInterceptRequest(async (sdk2, req) => {
+    try {
+      const urlString = req.getUrl();
+      const url = new URL(urlString);
+      sdk2.console.log(`[OAuthPlugin] Intercepted request: ${urlString}`);
+      if (!url.pathname.includes("/authorize") && !url.pathname.includes("/auth")) return;
+      const params = new URLSearchParams(url.search);
+      const redirectUri = params.get("redirect_uri");
+      if (!redirectUri) return;
+      const reqId = req.getId();
+      requestMap.set(reqId, redirectUri);
+      const clientId = params.get("client_id") ?? "(missing)";
+      const responseType = params.get("response_type") ?? "(missing)";
+      const isScan = params.has("scan");
+      if (isScan) return;
+      const output = {
+        original_url: urlString,
+        client_id: clientId,
+        redirect_uri: redirectUri,
+        response_type: responseType
+      };
+      try {
+        const filePath = path.join(os.tmpdir(), "oauth-fuzz-input.json");
+        await fs.writeFile(filePath, JSON.stringify(output, null, 2));
+      } catch (err) {
+        await sdk2.findings.create({
+          title: "[fs] Write Failed",
+          description: `Could not write to file: ${err}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector"
+        });
+      }
+      await sdk2.findings.create({
+        title: "[ ] OAuth2 Authorization Request Collected",
+        description: `client_id: ${clientId}
+redirect_uri: ${redirectUri}
+response_type: ${responseType}`,
+        request: req,
+        reporter: "oauth-open-redirect-detector"
+      });
+    } catch (err) {
+      sdk2.console.error(`Error in onInterceptRequest: ${err}`);
+    }
+  });
+  sdk.events.onInterceptResponse(async (sdk2, req, resp) => {
+    try {
+      const reqId = req.getId();
+      const url = new URL(req.getUrl());
+      const status = resp.getCode();
+      const location = resp.getHeader("location")?.[0];
+      const params = new URLSearchParams(url.search);
+      const isScan = params.has("scan");
+      if (!isScan) {
+        requestMap.delete(reqId);
+        return;
+      }
+      if (status >= 300 && status < 400 && location) {
+        const redirectUri = requestMap.get(reqId) ?? "(unknown)";
+        await sdk2.findings.create({
+          title: "[+] Redirect URI Misconfiguration Detected",
+          description: `Status: ${status}
+Location: ${location}
+Original Redirect URI: ${redirectUri}
+Request URL: ${url.href}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector"
+        });
+      }
+      requestMap.delete(reqId);
+    } catch (err) {
+      sdk2.console.error(`Error in onInterceptResponse: ${err}`);
+    }
+  });
+}
+export {
+  init
+};

package.json

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+{
+  "name": "caido-oauth-plugin",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "typecheck": "pnpm -r typecheck",
+    "build": "caido-dev build",
+    "watch": "caido-dev watch"
+  },
+  "devDependencies": {
+    "@caido-community/dev": "^0.1.3",
+    "@caido/sdk-backend": "^0.46.0",
+    "typescript": "5.5.4"
+  }
+}

packages/backend/dist/index.js

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+// packages/backend/src/index.ts
+import { promises as fs } from "fs";
+import * as path from "path";
+import os from "os";
+var requestMap = /* @__PURE__ */ new Map();
+function init(sdk) {
+  sdk.events.onInterceptRequest(async (sdk2, req) => {
+    try {
+      const urlString = req.getUrl();
+      const url = new URL(urlString);
+      sdk2.console.log(`[OAuthPlugin] Intercepted request: ${urlString}`);
+      if (!url.pathname.includes("/authorize") && !url.pathname.includes("/auth")) return;
+      const params = new URLSearchParams(url.search);
+      const redirectUri = params.get("redirect_uri");
+      if (!redirectUri) return;
+      const reqId = req.getId();
+      requestMap.set(reqId, redirectUri);
+      const clientId = params.get("client_id") ?? "(missing)";
+      const responseType = params.get("response_type") ?? "(missing)";
+      const isScan = params.has("scan");
+      if (isScan) return;
+      const output = {
+        original_url: urlString,
+        client_id: clientId,
+        redirect_uri: redirectUri,
+        response_type: responseType
+      };
+      try {
+        const filePath = path.join(os.tmpdir(), "oauth-fuzz-input.json");
+        await fs.writeFile(filePath, JSON.stringify(output, null, 2));
+      } catch (err) {
+        await sdk2.findings.create({
+          title: "[fs] Write Failed",
+          description: `Could not write to file: ${err}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector"
+        });
+      }
+      await sdk2.findings.create({
+        title: "[ ] OAuth2 Authorization Request Collected",
+        description: `client_id: ${clientId}
+redirect_uri: ${redirectUri}
+response_type: ${responseType}`,
+        request: req,
+        reporter: "oauth-open-redirect-detector"
+      });
+    } catch (err) {
+      sdk2.console.error(`Error in onInterceptRequest: ${err}`);
+    }
+  });
+  sdk.events.onInterceptResponse(async (sdk2, req, resp) => {
+    try {
+      const reqId = req.getId();
+      const url = new URL(req.getUrl());
+      const status = resp.getCode();
+      const location = resp.getHeader("location")?.[0];
+      const params = new URLSearchParams(url.search);
+      const isScan = params.has("scan");
+      if (!isScan) {
+        requestMap.delete(reqId);
+        return;
+      }
+      if (status >= 300 && status < 400 && location) {
+        const redirectUri = requestMap.get(reqId) ?? "(unknown)";
+        await sdk2.findings.create({
+          title: "[+] Redirect URI Misconfiguration Detected",
+          description: `Status: ${status}
+Location: ${location}
+Original Redirect URI: ${redirectUri}
+Request URL: ${url.href}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector"
+        });
+      }
+      requestMap.delete(reqId);
+    } catch (err) {
+      sdk2.console.error(`Error in onInterceptResponse: ${err}`);
+    }
+  });
+}
+export {
+  init
+};

packages/backend/package.json

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+{
+  "name": "backend",
+  "version": "0.0.0",
+  "type": "module",
+  "types": "src/index.ts",
+  "scripts": {
+    "typecheck": "tsc --noEmit",
+    "build": "vite build"
+  }
+}

packages/backend/pnpm-lock.yaml

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+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    devDependencies:
+      '@caido/sdk-backend':
+        specifier: ^0.46.0
+        version: 0.46.0
+
+packages:
+
+  '@caido/quickjs-types@0.17.2':
+    resolution: {integrity: sha512-5kcucGORMNEbcdU91yKLYZG/TFDqsO6XmCZ1TnU6V48E61mmqrJg6kjrfOFP1WOugDm+ZcGd/Su3p3XkFXfaPg==}
+
+  '@caido/sdk-backend@0.46.0':
+    resolution: {integrity: sha512-peUKW/4Nrw9WVxIahc+6KrVtxA7vsbpuJqOoBxudxq7tQJ+cV9IEqzvYoFFo8KlnrTkeUQUJvd0W4WsM3HgxEg==}
+
+  '@caido/sdk-shared@0.1.1':
+    resolution: {integrity: sha512-JAV5ajUqxZdXYPTmDEvIKBZon8I5uHq44ATj0Nj3BVpllRDUGY9kcBd+PXMD50+3lv1CvhR3/f6q24T0+4aVJQ==}
+
+snapshots:
+
+  '@caido/quickjs-types@0.17.2': {}
+
+  '@caido/sdk-backend@0.46.0':
+    dependencies:
+      '@caido/quickjs-types': 0.17.2
+      '@caido/sdk-shared': 0.1.1
+
+  '@caido/sdk-shared@0.1.1': {}

packages/backend/src/index.ts

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+import type { SDK, DefineAPI } from "caido:plugin";
+import type { Request, Response } from "caido:utils";
+import { promises as fs } from "fs";
+import * as path from "path";
+import os from "os";
+
+export type API = DefineAPI<{}>;
+
+const requestMap = new Map<string, string>();
+export function init(sdk: SDK<API>) {
+
+  sdk.events.onInterceptRequest(async (sdk, req: Request) => {
+    try {
+      const urlString = req.getUrl();
+      const url = new URL(urlString);
+      sdk.console.log(`[OAuthPlugin] Intercepted request: ${urlString}`);
+
+      if (!url.pathname.includes("/authorize") && !url.pathname.includes("/auth")) return;
+
+      const params = new URLSearchParams(url.search);
+      const redirectUri = params.get("redirect_uri");
+      if (!redirectUri) return;
+
+      const reqId = req.getId();
+      requestMap.set(reqId, redirectUri);
+
+      const clientId = params.get("client_id") ?? "(missing)";
+      const responseType = params.get("response_type") ?? "(missing)";
+      const isScan = params.has("scan");
+      if (isScan) return;
+
+      const output = {
+        original_url: urlString,
+        client_id: clientId,
+        redirect_uri: redirectUri,
+        response_type: responseType,
+      };
+
+
+      try {
+        const filePath = path.join(os.tmpdir(), "oauth-fuzz-input.json");
+        await fs.writeFile(filePath, JSON.stringify(output, null, 2));
+      } catch (err) {
+        await sdk.findings.create({
+          title: "[fs] Write Failed",
+          description: `Could not write to file: ${err}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector"
+        });
+      }
+      await sdk.findings.create({
+        title: "[ ] OAuth2 Authorization Request Collected",
+        description: `client_id: ${clientId}\nredirect_uri: ${redirectUri}\nresponse_type: ${responseType}`,
+        request: req,
+        reporter: "oauth-open-redirect-detector"
+      });
+
+    } catch (err) {
+      sdk.console.error(`Error in onInterceptRequest: ${err}`);
+    }
+  });
+
+  sdk.events.onInterceptResponse(async (sdk, req: Request, resp: Response) => {
+    try {
+      const reqId = req.getId();
+      const url = new URL(req.getUrl());
+      const status = resp.getCode();
+      const location = resp.getHeader("location")?.[0];
+
+      const params = new URLSearchParams(url.search);
+      const isScan = params.has("scan");
+
+      if (!isScan) {
+        requestMap.delete(reqId);
+        return;
+      }
+
+      if (status >= 300 && status < 400 && location) {
+        const redirectUri = requestMap.get(reqId) ?? "(unknown)";
+
+        await sdk.findings.create({
+          title: "[+] Redirect URI Misconfiguration Detected",
+          description: `Status: ${status}\nLocation: ${location}\nOriginal Redirect URI: ${redirectUri}\nRequest URL: ${url.href}`,
+          request: req,
+          reporter: "oauth-open-redirect-detector",
+        });
+      }
+
+      requestMap.delete(reqId);
+    } catch (err) {
+      sdk.console.error(`Error in onInterceptResponse: ${err}`);
+    }
+  });
+}

packages/backend/tsconfig.json

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+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "types": ["@caido/sdk-backend"],
+    "lib": ["ESNext", "DOM"]
+  },
+  "include": ["./src/**/*.ts"]
+}

pnpm-workspace.yaml

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+packages:
+  - 'packages/*'

tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "esnext",
+    "module": "esnext",
+    "lib": ["ESNext"],
+
+    "jsx": "preserve",
+    "noImplicitAny": true,
+    "noUncheckedIndexedAccess": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "resolveJsonModule": true,
+
+    "moduleResolution": "bundler",
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "noUnusedLocals": true,
+
+    "useDefineForClassFields": true,
+    "isolatedModules": true,
+
+    "baseUrl": "."
+  }
+}