10 Excellent Ways to Secure Your Spring Boot Application - Devoxx Belgium 2019

Spring Boot is an excellent way to build Java applications with the Spring Framework. If you’re developing apps that handle sensitive data, you should make sure they’re secure.

This session will cover HTTPS, dependency checking, CSRF, using a CSP to prevent XSS, OIDC, password hashing, and much more!

You’ll learn how to add these features to a real application, using the Java language you know and love.

* YouTube video: https://www.youtube.com/watch?v=PpqNMhe4Bd0
* Blog post: https://developer.okta.com/blog/2018/07/30/10-ways-to-secure-spring-boot
* Cheat sheet: https://snyk.io/blog/spring-boot-security-best-practices/

Transcript

1. Brian Vermeer and Matt Raible 10 Excellent Ways to Secure Your Spring Boot Application @BrianVerm | @mraible
2. 10 Excellent Ways... https://bit.ly/secure-spring-boot
3. 1. Use HTTPS
4. Use HTTPS Everywhere! 4 Let’s Encrypt offers free HTTPS certificates certbot can be used to generate certificates mkcert can be used to create localhost certificates Spring Boot Starter ACME for automating certificates
5. howhttps.works
6. @Configuration public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.requiresChannel().anyRequest().requiresSecure(); } }
7. @Configuration public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.requiresChannel() .requestMatchers(r -> r.getHeader("X-Forwarded-Proto") != null) .requiresSecure(); } }
8. 2. Scan Dependencies
10. Java Struts 2 RCE Vulnerability CVE 2017-5638 Source: SecurityIntelligence.com
11. Your App
12. Your App Your Code
13. Serverless Example: Fetch file & store in S3 'use strict'; const fetch = require('node-fetch'); const AWS = require('aws-sdk'); // eslint-disable-line import/no-extraneous-dependencies const s3 = new AWS.S3(); module.exports.save = (event, context, callback) => { fetch(event.image_url) .then((response) => { if (response.ok) { return response; } return Promise.reject(new Error( `Failed to fetch ${response.url}: ${response.status} ${response.statusText}`)); }) .then(response => response.buffer()) .then(buffer => ( s3.putObject({ Bucket: process.env.BUCKET, Key: event.key, Body: buffer, }).promise() )) .then(v => callback(null, v), callback); }; 19 Lines of Code https://github.com/serverless/examples/tree/master/aws-node-fetch-file-and-store-in-s3
14. Serverless Example: Fetch file & store in S3 'use strict'; const fetch = require('node-fetch'); const AWS = require('aws-sdk'); // eslint-disable-line import/no-extraneous-dependencies const s3 = new AWS.S3(); module.exports.save = (event, context, callback) => { fetch(event.image_url) .then((response) => { if (response.ok) { return response; } return Promise.reject(new Error( `Failed to fetch ${response.url}: ${response.status} ${response.statusText}`)); }) .then(response => response.buffer()) .then(buffer => ( s3.putObject({ Bucket: process.env.BUCKET, Key: event.key, Body: buffer, }).promise() )) .then(v => callback(null, v), callback); }; 19 Lines of Code 2 Direct dependencies https://github.com/serverless/examples/tree/master/aws-node-fetch-file-and-store-in-s3 { "dependencies": { "aws-sdk": "^2.7.9", "node-fetch": "^1.6.3" } }
15. Serverless Example: Fetch file & store in S3 'use strict'; const fetch = require('node-fetch'); const AWS = require('aws-sdk'); // eslint-disable-line import/no-extraneous-dependencies const s3 = new AWS.S3(); module.exports.save = (event, context, callback) => { fetch(event.image_url) .then((response) => { if (response.ok) { return response; } return Promise.reject(new Error( `Failed to fetch ${response.url}: ${response.status} ${response.statusText}`)); }) .then(response => response.buffer()) .then(buffer => ( s3.putObject({ Bucket: process.env.BUCKET, Key: event.key, Body: buffer, }).promise() )) .then(v => callback(null, v), callback); }; 19 Lines of Code 2 Direct dependencies 19 dependencies (incl. indirect) https://github.com/serverless/examples/tree/master/aws-node-fetch-file-and-store-in-s3 { "dependencies": { "aws-sdk": "^2.7.9", "node-fetch": "^1.6.3" } }
16. Serverless Example: Fetch file & store in S3 'use strict'; const fetch = require('node-fetch'); const AWS = require('aws-sdk'); // eslint-disable-line import/no-extraneous-dependencies const s3 = new AWS.S3(); module.exports.save = (event, context, callback) => { fetch(event.image_url) .then((response) => { if (response.ok) { return response; } return Promise.reject(new Error( `Failed to fetch ${response.url}: ${response.status} ${response.statusText}`)); }) .then(response => response.buffer()) .then(buffer => ( s3.putObject({ Bucket: process.env.BUCKET, Key: event.key, Body: buffer, }).promise() )) .then(v => callback(null, v), callback); }; 19 Lines of Code 2 Direct dependencies 19 dependencies (incl. indirect) 191,155 Lines of Code https://github.com/serverless/examples/tree/master/aws-node-fetch-file-and-store-in-s3 { "dependencies": { "aws-sdk": "^2.7.9", "node-fetch": "^1.6.3" } }
17. https://snyk.io/opensourcesecurity-2019
18. Demo
19. Matt's Life Hack: Don't fix your socks; fix your toes!
20. 3. Upgrade Libraries
22. How well do you know your dependencies? 22 Dependencies Dependency Health Indirect Dependencies Regular Commits Regular Releases
23. Check for Updates with npm npm i -g npm-check-updates ncu https://www.npmjs.com/package/npm-check-updates
24. Check for Updates with Maven mvn versions:display-dependency-updates https://www.mojohaus.org/versions-maven-plugin
25. Check for Updates with Gradle gradle dependencyUpdates \ -Drevision=release https://github.com/ben-manes/gradle-versions-plugin
26. 4. Enable CSRF
27. @EnableWebSecurity public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http .csrf() .csrfTokenRepository( CookieCsrfTokenRepository.withHttpOnlyFalse()); } }
28. Brian's Life Hack: Portable pizza oven
29. Brian's Life Hack: Portable pizza oven
30. 5. Use a CSP
31. Default Spring Security Headers Cache-Control: no-cache, no-store, max-age=0, must-revalidate Pragma: no-cache Expires: 0 X-Content-Type-Options: nosniff Strict-Transport-Security: max-age=31536000; includeSubDomains X-Frame-Options: DENY X-XSS-Protection: 1; mode=block
32. @EnableWebSecurity public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.headers() .contentSecurityPolicy("script-src 'self' " + "https://trustedscripts.example.com; " + "object-src https://trustedplugins.example.com; " + "report-uri /csp-report-endpoint/"); } }
33. https://securityheaders.com
34. https://developer.okta.com/blog/2019/04/11/site-security-cloudflare-netlify
35. Brian's Life Hack Easy anti virus system
36. Brian's Life Hack Easy anti virus system
37. 6. Use OIDC for Auth
38. OIDC Authorization Code Flow
39. Spring Security OIDC Configuration spring: security: oauth2: client: registration: okta: client-id: {clientId} client-secret: {clientSecret} provider: okta: issuer-uri: https://{yourOktaDomain}/oauth2/default
40. OIDC Authentication Demo @Grab('spring-boot-starter-oauth2-client') @RestController class Application { @GetMapping('/') String home(java.security.Principal user) { 'Hello ' + user.name } }
41. Works with Spring WebFlux https://developer.okta.com/blog/2018/11/26/spring-boot-2-dot-1-oidc-oauth2-reactive-apis
42. And JHipster! https://developer.okta.com/blog/2019/04/04/java-11-java-12-jhipster-oidc
43. 7. Hash Passwords
44. Deterministic hash("TSD") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 hash("TSD") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 hash("TSD") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 hash("TSD") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3
45. One-way Function hash("TSD") =3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 unhash("3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3") = ???
46. It should not be predictable hash("TSD0") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 hash("TSD1") = 98eadd540e6c0579a1bcbe375c8d1ae2863beacdfb9af803e5f4d6dd1f8926c2 hash("TSD2") = 665ec59d7fb01f6070622780e744040239f0aaa993eae1d088bc4f0137d270ef hash("TSD3") = 7ae89eb10a765ec2459bee59ed1d3ed97dbb9f31ec5c7bd13d19380bc39f5288
47. One-to-one mapping hash("TSD") = 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3 hash("123") != 3c9c93e0f8eb2161e5787f7cd3e4b67f8d98fbd80b7d237cc757583b06daa3e3
48. Hashed Passwords in Spring @Bean public PasswordEncoder passwordEncoder() { return new SCryptPasswordEncoder(); }
49. Hashed Passwords in Spring @Autowired private PasswordEncoder passwordEncoder; public String hashPassword(String password) { return passwordEncoder.encode(password); }
50. Matt's Life Hack: Clean hard-to-reach places with
51. 8. Use Secure Secrets
53. https://github.com/awslabs/git-secrets
54. Spring Vault <dependencies> <dependency> <groupId>org.springframework.vault</groupId> <artifactId>spring-vault-core</artifactId> <version>2.2.0.RELEASE</version> </dependency> </dependencies>
55. Spring Vault @Value("${password}") char[] password;
56. Why char[] instead of String for password? Strings are immutable, can't wipe data String passwords can be accidentally printed https://www.baeldung.com/java-storing-passwords Printing String password -> password Printing char[] password -> [C@6e8cf4c6
57. 9. Test with ZAP
58. OWASP Zed Attack Proxy Two approaches: Spider and Active Scan Spider starts with a seed of URLs Active Scan records a session then plays it back, scanning for known vulnerabilities
59. Learn More About ZAP Homepage https://www.owasp.org/index.php/OWASP_Zed_Attack_Proxy_Project GitHub https://github.com/zaproxy/zaproxy Twitter @zaproxy
60. 10. Security Reviews
61. Code Review Topics 1. Identify and validate any third party input 2. Never store credentials as code/config 3. Test for new security vulnerabilities in third-party open source dependencies. 4. Authenticate inbound requests 5. Enforce the least privilege principle 6. Prefer whitelist over blacklist 7. Handle sensitive data with care 8. Do not allow back doors in your code 9. Protect against well-known attacks 10. Statically test your source code on every PR, automatically
62. Java security best practices cheat sheet http://bit.ly/java-security
63. 10 Excellent Ways to Secure Spring Boot 1. Use HTTPS 2. Scan dependencies 3. Dependencies up-to-date 4. Enable CSRF protection 5. Use a Content Security Policy 6. Use OIDC 7. Hash passwords 8. Store secrets securely 9. Test with OWASP's ZAP 10. Code review with experts
64. https://snyk.io/blog/spring-boot-security-best-practices
66. Life Hack: Use a toilet seat for a TV dinner setup
67. Questions? 67 Keep in Touch! @mraible @BrianVerm Presentation speakerdeck.com/mraible Code github.com/oktadeveloper