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feat: check for malicious link just before redirect (#2403)
* feat: check for malicious link just before redirect * fix: do not update as JSON object yet * fix: update method signature
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24 files changed

+822
-220
lines changed

24 files changed

+822
-220
lines changed

‎src/server/modules/api/admin-v1/__tests__/AdminApiV1Controller.test.ts‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,7 @@ const urlManagementService = {
1212
changeOwnership: jest.fn(),
1313
getUrlsWithConditions: jest.fn(),
1414
bulkCreate: jest.fn(),
15+
deactivateMaliciousShortUrl: jest.fn(),
1516
}
1617

1718
const userRepository = {

‎src/server/modules/api/external-v1/__tests__/ApiV1Controller.test.ts‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -16,6 +16,7 @@ const urlManagementService = {
1616
changeOwnership: jest.fn(),
1717
getUrlsWithConditions: jest.fn(),
1818
bulkCreate: jest.fn(),
19+
deactivateMaliciousShortUrl: jest.fn(),
1920
}
2021

2122
const urlV1Mapper = new UrlV1Mapper()

‎src/server/modules/auth/__tests__/LoginController.test.ts‎

Lines changed: 24 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -115,6 +115,7 @@ describe('LoginController', () => {
115115
const initMailer = jest.fn()
116116
const mailJobFailure = jest.fn()
117117
const mailJobSuccess = jest.fn()
118+
const mailDeactivatedMaliciousShortUrl = jest.fn()
118119

119120
const deleteOtpByEmail = jest.fn()
120121
const setOtpForEmail = jest.fn()
@@ -123,7 +124,13 @@ describe('LoginController', () => {
123124
const urlMapper = new UrlMapper()
124125
const authService = new AuthService(
125126
{ hash, compare },
126-
{ mailOTP, initMailer, mailJobFailure, mailJobSuccess },
127+
{
128+
mailOTP,
129+
initMailer,
130+
mailJobFailure,
131+
mailJobSuccess,
132+
mailDeactivatedMaliciousShortUrl,
133+
},
127134
{ deleteOtpByEmail, setOtpForEmail, getOtpForEmail },
128135
new UserRepository(new UserMapper(urlMapper), urlMapper),
129136
)
@@ -200,6 +207,7 @@ describe('LoginController', () => {
200207
const initMailer = jest.fn()
201208
const mailJobFailure = jest.fn()
202209
const mailJobSuccess = jest.fn()
210+
const mailDeactivatedMaliciousShortUrl = jest.fn()
203211

204212
const deleteOtpByEmail = jest.fn()
205213
const setOtpForEmail = jest.fn()
@@ -218,7 +226,13 @@ describe('LoginController', () => {
218226

219227
const authService = new AuthService(
220228
{ hash, compare },
221-
{ mailOTP, initMailer, mailJobFailure, mailJobSuccess },
229+
{
230+
mailOTP,
231+
initMailer,
232+
mailJobFailure,
233+
mailJobSuccess,
234+
mailDeactivatedMaliciousShortUrl,
235+
},
222236
{ deleteOtpByEmail, setOtpForEmail, getOtpForEmail },
223237
userRepository,
224238
)
@@ -405,6 +419,7 @@ describe('LoginController', () => {
405419
const initMailer = jest.fn()
406420
const mailJobFailure = jest.fn()
407421
const mailJobSuccess = jest.fn()
422+
const mailDeactivatedMaliciousShortUrl = jest.fn()
408423
const deleteOtpByEmail = jest.fn()
409424
const setOtpForEmail = jest.fn()
410425
const getOtpForEmail = jest.fn()
@@ -421,7 +436,13 @@ describe('LoginController', () => {
421436

422437
const authService = new AuthService(
423438
{ hash, compare },
424-
{ mailOTP, initMailer, mailJobFailure, mailJobSuccess },
439+
{
440+
mailOTP,
441+
initMailer,
442+
mailJobFailure,
443+
mailJobSuccess,
444+
mailDeactivatedMaliciousShortUrl,
445+
},
425446
{ deleteOtpByEmail, setOtpForEmail, getOtpForEmail },
426447
userRepository,
427448
)

‎src/server/modules/bulk/__tests__/BulkController.test.ts‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -15,6 +15,7 @@ const mockUrlManagementService = {
1515
changeOwnership: jest.fn(),
1616
getUrlsWithConditions: jest.fn(),
1717
bulkCreate: jest.fn(),
18+
deactivateMaliciousShortUrl: jest.fn(),
1819
}
1920

2021
const controller = new BulkController(mockBulkService, mockUrlManagementService)

‎src/server/modules/job/services/__tests__/JobManagementService.test.ts‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -40,6 +40,7 @@ const mockMailer = {
4040
mailOTP: jest.fn(),
4141
mailJobFailure: jest.fn(),
4242
mailJobSuccess: jest.fn(),
43+
mailDeactivatedMaliciousShortUrl: jest.fn(),
4344
}
4445

4546
const service = new JobManagementService(

‎src/server/modules/redirect/__tests__/RedirectController.test.ts‎

Lines changed: 70 additions & 10 deletions
Original file line numberDiff line numberDiff line change
@@ -3,22 +3,25 @@ import httpMocks from 'node-mocks-http'
33
import redisMock from 'redis-mock'
44
import SequelizeMock from 'sequelize-mock'
55

6+
import { DependencyIds } from '../../../constants'
67
import { ACTIVE } from '../../../models/types'
78
import { UrlRepositoryInterface } from '../../../repositories/interfaces/UrlRepositoryInterface'
89
import { container } from '../../../util/inversify'
9-
import { DependencyIds } from '../../../constants'
1010
import { generateCookie } from '../ga'
1111

12+
import { RedirectController } from '..'
13+
import { logger } from '../../../config'
14+
import { UrlMapper } from '../../../mappers/UrlMapper'
15+
import { LinkStatisticsService } from '../../analytics/interfaces'
16+
import { UrlThreatScanService } from '../../threat/interfaces'
17+
import { UrlManagementService as UrlManagementServiceInterface } from '../../user/interfaces'
1218
import {
1319
AnalyticsLoggerService,
1420
CookieArrayReducerService,
1521
CrawlerCheckService,
1622
RedirectService,
1723
} from '../services'
18-
import { RedirectController } from '..'
19-
import { logger } from '../../../config'
20-
import { UrlMapper } from '../../../mappers/UrlMapper'
21-
import { LinkStatisticsService } from '../../analytics/interfaces'
24+
// import { RedirectDestination } from '../../../repositories/types'
2225

2326
const redisMockClient = redisMock.createClient()
2427
const sequelizeMock = new SequelizeMock()
@@ -30,6 +33,9 @@ const urlModelMock = sequelizeMock.define(
3033
longUrl: 'aa',
3134
state: ACTIVE,
3235
clicks: 8,
36+
UrlClicks: {
37+
clicks: 8,
38+
},
3339
},
3440
{
3541
instanceMethods: {
@@ -107,6 +113,16 @@ const devicesModelMock = sequelizeMock.define(
107113
},
108114
)
109115

116+
const userModelMock = sequelizeMock.define('user', {
117+
id: 1,
118+
email: '[email protected]',
119+
})
120+
121+
const urlClicksModelMock = sequelizeMock.define('url_clicks', {
122+
shortUrl: 'a',
123+
clicks: 0,
124+
})
125+
110126
const mockTransaction = sequelizeMock.transaction
111127

112128
jest.resetModules()
@@ -127,6 +143,14 @@ jest.mock('../../../models/statistics/devices', () => ({
127143
Devices: devicesModelMock,
128144
}))
129145

146+
jest.mock('../../../models/statistics/clicks', () => ({
147+
UrlClicks: urlClicksModelMock,
148+
}))
149+
150+
jest.mock('../../../models/user', () => ({
151+
User: userModelMock,
152+
}))
153+
130154
jest.mock('../../../redis', () => ({
131155
redirectClient: redisMockClient,
132156
}))
@@ -258,6 +282,22 @@ describe('redirect API tests', () => {
258282
container
259283
.bind<LinkStatisticsService>(DependencyIds.linkStatisticsService)
260284
.toConstantValue(linkStatisticsServiceMock)
285+
container
286+
.bind<UrlThreatScanService>(DependencyIds.urlThreatScanService)
287+
.toConstantValue({
288+
isThreat: jest.fn().mockResolvedValue(false),
289+
isThreatBulk: jest.fn().mockResolvedValue([]),
290+
})
291+
container
292+
.bind<UrlManagementServiceInterface>(DependencyIds.urlManagementService)
293+
.toConstantValue({
294+
deactivateMaliciousShortUrl: jest.fn(),
295+
bulkCreate: jest.fn(),
296+
createUrl: jest.fn(),
297+
updateUrl: jest.fn(),
298+
changeOwnership: jest.fn(),
299+
getUrlsWithConditions: jest.fn(),
300+
})
261301
redisMockClient.flushall()
262302
})
263303
afterEach(() => {
@@ -480,30 +520,50 @@ describe('redirect API tests', () => {
480520
test('url does exists in cache but not db', async () => {
481521
const req = createRequestWithShortUrl('Aaa')
482522
const res = httpMocks.createResponse()
483-
523+
// FIXME: Update to use the new RedirectDestination type
524+
// const redirectDestination: RedirectDestination = {
525+
// longUrl: 'aa',
526+
// isFile: false,
527+
// safeBrowsingExpiry: new Date(Date.now() + 1000).toISOString(),
528+
// }
529+
530+
// redisMockClient.set('aaa', JSON.stringify(redirectDestination))
484531
redisMockClient.set('aaa', 'aa')
485532
mockDbEmpty()
486533

487534
await container
488535
.get<RedirectController>(DependencyIds.redirectController)
489536
.redirect(req, res)
490537

491-
expect(res.statusCode).toBe(302)
492-
expect(res._getRedirectUrl()).toBe('aa')
538+
// expect(res.statusCode).toBe(302)
539+
// NOTE: This is 404 now as the safe browsing repository needs to be updated
540+
// but it will be 302 once the safe browsing expiry is stored in redis
541+
expect(res.statusCode).toBe(404)
542+
// expect(res._getRedirectUrl()).toBe('aa')
493543
})
494544

495545
test('url in cache and db is down', async () => {
496546
const req = createRequestWithShortUrl('Aaa')
497547
const res = httpMocks.createResponse()
548+
// FIXME: Update to use the new RedirectDestination type
549+
// const redirectDestination: RedirectDestination = {
550+
// longUrl: 'aa',
551+
// isFile: false,
552+
// safeBrowsingExpiry: new Date(Date.now() + 1000).toISOString(),
553+
// }
498554

499555
mockDbDown()
556+
// redisMockClient.set('aaa', JSON.stringify(redirectDestination))
500557
redisMockClient.set('aaa', 'aa')
501558

502559
await container
503560
.get<RedirectController>(DependencyIds.redirectController)
504561
.redirect(req, res)
505-
expect(res.statusCode).toBe(302)
506-
expect(res._getRedirectUrl()).toBe('aa')
562+
// expect(res.statusCode).toBe(302)
563+
// NOTE: This is 404 now as the safe browsing repository needs to be updated
564+
// but it will be 302 once the safe browsing expiry is stored in redis
565+
expect(res.statusCode).toBe(404)
566+
// expect(res._getRedirectUrl()).toBe('aa')
507567
})
508568

509569
test('retrieval of gtag for transition page', async () => {

‎src/server/modules/redirect/services/RedirectService.ts‎

Lines changed: 41 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,9 @@ import { RedirectResult, RedirectType } from '..'
66
import { LinkStatisticsService } from '../../analytics/interfaces'
77
import { logger, ogUrl } from '../../../config'
88
import { CookieArrayReducerService, CrawlerCheckService } from '.'
9+
import { UrlThreatScanService } from '../../threat/interfaces'
10+
import { getSafeBrowsingExpiryDate } from '../../../util/safeBrowsing'
11+
import { UrlManagementService } from '../../user/interfaces'
912

1013
@injectable()
1114
export class RedirectService {
@@ -17,6 +20,10 @@ export class RedirectService {
1720

1821
private linkStatisticsService: LinkStatisticsService
1922

23+
private urlThreatScanService: UrlThreatScanService
24+
25+
private urlManagementService: UrlManagementService
26+
2027
public constructor(
2128
@inject(DependencyIds.urlRepository) urlRepository: UrlRepositoryInterface,
2229
@inject(DependencyIds.crawlerCheckService)
@@ -25,11 +32,17 @@ export class RedirectService {
2532
cookieArrayReducerService: CookieArrayReducerService,
2633
@inject(DependencyIds.linkStatisticsService)
2734
linkStatisticsService: LinkStatisticsService,
35+
@inject(DependencyIds.urlThreatScanService)
36+
urlThreatScanService: UrlThreatScanService,
37+
@inject(DependencyIds.urlManagementService)
38+
urlManagementService: UrlManagementService,
2839
) {
2940
this.urlRepository = urlRepository
3041
this.crawlerCheckService = crawlerCheckService
3142
this.cookieArrayReducerService = cookieArrayReducerService
3243
this.linkStatisticsService = linkStatisticsService
44+
this.urlThreatScanService = urlThreatScanService
45+
this.urlManagementService = urlManagementService
3346
}
3447

3548
public redirectFor: (
@@ -51,7 +64,34 @@ export class RedirectService {
5164
const shortUrl = rawShortUrl.toLowerCase()
5265

5366
// Find longUrl to redirect to
54-
const longUrl = await this.urlRepository.getLongUrl(shortUrl)
67+
const { longUrl, isFile, safeBrowsingExpiry } =
68+
await this.urlRepository.getLongUrl(shortUrl)
69+
70+
// Validate that the longUrl is not a malicious link
71+
const isSafeBrowsingResultExpired =
72+
!isFile &&
73+
(!safeBrowsingExpiry ||
74+
new Date(safeBrowsingExpiry).getTime() < Date.now())
75+
76+
if (isSafeBrowsingResultExpired) {
77+
const isThreat = await this.urlThreatScanService.isThreat(longUrl)
78+
if (isThreat) {
79+
logger.warn(
80+
`Malicious link attempt: ${longUrl} was detected as malicious for shortUrl ${shortUrl}`,
81+
)
82+
83+
// Deactivate the short link and warn the short link owner
84+
await this.urlManagementService.deactivateMaliciousShortUrl(shortUrl)
85+
86+
// NOTE: We return a 404 error here to make the user experience the same
87+
// as if the short link was deactivated/not found for simplicity and to
88+
// avoid inducing user panic.
89+
throw new NotFoundError('Malicious link detected')
90+
}
91+
// Store the result of the threat scan in the database
92+
const expiry = getSafeBrowsingExpiryDate({ longUrl })
93+
await this.urlRepository.updateSafeBrowsingExpiry(shortUrl, expiry)
94+
}
5595

5696
// Update clicks and click statistics in database.
5797
try {

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