From 7b54a81cccf6b4c12269e9d6897d608b1a99537a Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Thu, 6 Jan 2022 11:16:35 +0100
Subject: [PATCH] Prevent video import on non unicast ips

---
 .../validators/videos/video-imports.ts        | 18 ++++++++++++
 .../tests/api/check-params/video-imports.ts   | 28 +++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/server/middlewares/validators/videos/video-imports.ts b/server/middlewares/validators/videos/video-imports.ts
index 640139c73..e4b54283f 100644
--- a/server/middlewares/validators/videos/video-imports.ts
+++ b/server/middlewares/validators/videos/video-imports.ts
@@ -13,6 +13,7 @@ import { CONFIG } from '../../../initializers/config'
 import { CONSTRAINTS_FIELDS } from '../../../initializers/constants'
 import { areValidationErrors, doesVideoChannelOfAccountExist } from '../shared'
 import { getCommonVideoEditAttributes } from './videos'
+import { isValid as isIPValid, parse as parseIP } from 'ipaddr.js'
 
 const videoImportAddValidator = getCommonVideoEditAttributes().concat([
   body('channelId')
@@ -71,6 +72,23 @@ const videoImportAddValidator = getCommonVideoEditAttributes().concat([
       return res.fail({ message: 'Should have a magnetUri or a targetUrl or a torrent file.' })
     }
 
+    if (req.body.targetUrl) {
+      const hostname = new URL(req.body.targetUrl).hostname
+
+      if (isIPValid(hostname)) {
+        const parsed = parseIP(hostname)
+
+        if (parsed.range() !== 'unicast') {
+          cleanUpReqFiles(req)
+
+          return res.fail({
+            status: HttpStatusCode.FORBIDDEN_403,
+            message: 'Cannot use non unicast IP as targetUrl.'
+          })
+        }
+      }
+    }
+
     if (!await isImportAccepted(req, res)) return cleanUpReqFiles(req)
 
     return next()
diff --git a/server/tests/api/check-params/video-imports.ts b/server/tests/api/check-params/video-imports.ts
index d6d745488..6c31daa9b 100644
--- a/server/tests/api/check-params/video-imports.ts
+++ b/server/tests/api/check-params/video-imports.ts
@@ -108,6 +108,34 @@ describe('Test video imports API validator', function () {
       await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields })
     })
 
+    it('Should fail with localhost', async function () {
+      const fields = { ...baseCorrectParams, targetUrl: 'http://localhost:8000' }
+
+      await makePostBodyRequest({ url: server.url, path, token: server.accessToken, fields })
+    })
+
+    it('Should fail with a private IP target urls', async function () {
+      const targetUrls = [
+        'http://127.0.0.1:8000',
+        'http://127.0.0.1',
+        'http://127.0.0.1/hello',
+        'https://192.168.1.42',
+        'http://192.168.1.42'
+      ]
+
+      for (const targetUrl of targetUrls) {
+        const fields = { ...baseCorrectParams, targetUrl }
+
+        await makePostBodyRequest({
+          url: server.url,
+          path,
+          token: server.accessToken,
+          fields,
+          expectedStatus: HttpStatusCode.FORBIDDEN_403
+        })
+      }
+    })
+
     it('Should fail with a long name', async function () {
       const fields = { ...baseCorrectParams, name: 'super'.repeat(65) }