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Web architecture mechanism and threats

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Fundamental of web architecture and threats, OWASP Thailand 2014

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Web architecture mechanism and threats

  1. 1. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture - Mechanism and Threats Sumedt Jitpukdebodin Senior Security Researcher CompTIA Security+, LPIC-1 , NCLA, C|EHv6, eCPPT, eWPT, IWSS, CPTE
  2. 2. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. ~# whoami  Name: Sumedt Jitpukdebodin(สุเมธ จิตภักดีบดินทร์)  My blog: http://www.r00tsec.com, http://twitter.com/materaj, https://www.facebook.com/hackandsecbook  Jobs – I-SECURE Co., Ltd. – Research And Develop Engineer, Senior Web Application Security Specialist, Senior Security Researcher – Writer – English article@ http://packetstormsecurity.com/files/author/9011/ and please google my name. – Many Thai article, please google my Thai name. – หนังสือ “Hacking & Security Book "Network Security หนังสือฉบับก้าวสู่นักทดสอบและป้ องกันการเจาะระบบ”  Hobby: Penetration Testing, Hacking, Reading Info Security, Play Games, Traveling around the world, Write Article, Teaching and more...
  3. 3. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Agenda
  4. 4. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Agenda  Web Architecture  Web Architecture Attack  Security Controls & Mechanism
  5. 5. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture
  6. 6. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Basic Web Architecture  Two Tier Architecture – Web browser display content that return from Web Server – Web server provide resource for client
  7. 7. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. HTML  HTML(Hyper Text Markup Language) – Document Layout Language – Viewed by using Web Browser.
  8. 8. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. URI  URI(Universal Resource Identifier)
  9. 9. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. URI(2)  URL(Universal Resource Locator)  URN(Universal Resource Name)
  10. 10. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. HTTP  HTTP(Hyper Text Transfer Protocol)  HTTP is an application layer.  HTTP has 2 way communication: HTTP Request and HTTP Response.
  11. 11. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. HTTP(2)  Request Message – Request Line – Request Header – An empty line – An optional Message Body
  12. 12. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. HTTP(3)
  13. 13. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Request Method – HEAD – GET – POST – PUT – DELETE – TRACE – OPTIONS – CONNECT
  14. 14. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Safe Method – HEAD – GET – OPTIONS – TRACE – POST – PUT – DELETE – CONNECT
  15. 15. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Status Code  Success: 2xx  Redirection: 3xx  Client-Side Error: 4xx  Server-Side Error: 5xx
  16. 16. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. HTTP Session State  HTTP is stateless Protocol  Solutions – Cookies – Sessions – Hidden variable – URL encode parameter( /index.php?session_id=$session_code)
  17. 17. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture Extension  Two tier architecture is not enough  Common Gateway Interface(CGI)  Standard protocol for interfacing with external application software with a web server  CGI program are executable programs that run on the web server.
  18. 18. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Javascript  Scripting language designed for dynamic, interactive web application  Run on client side.  Preprocessing data on the client before submission to a server.  Changing content type and styles
  19. 19. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Three tier web architecture
  20. 20. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Make HTTP to stateful(2)  Cookie  A text stored on a client’s computer by a web browser.  Sent as an HTTP Header  Can used for authenticating, session tracking
  21. 21. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Server and Client Processing  Server-Side Processing  PHP  ASP  ASP.NET  Perl  J2EE  Python, Django  Ruby On Rail  Client-Side Processing  CSS  HTML  Javascript  Adobe Flash  Microsoft Silverlight
  22. 22. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. AJAX  Asynchronous Javascript and XML(AJAX)  Create by Jesse James Garrett, Febuary 18, 2005  Ajax Incorporates  XHTML, CSS, Document Object Model(DOM), XML and XSLT, XMLHttpRequest, Javascript
  23. 23. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. AJAX(2)
  24. 24. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. AJAX(3)
  25. 25. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. JSON  Javascript Object Notation(JSON)  JSON is lightweight computer data interchange format.  JSON is based on a subset of Javascript programming language.  Using of XML format.
  26. 26. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. JSON Request && Response
  27. 27. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. JSON(2)
  28. 28. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. XML  eXtensible Markup Language  Using for information exchange.  Two primary building blocks of XML are elements and attributes.  Elements are tags and have values.  Elements are structured as a tree.  Alternatively, elements may have both attributes as well as data.  Attributes help you to give more meaning and describe your element more efficiently and clearly.
  29. 29. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. XML(2)  Tag  Element  Content
  30. 30. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. XML(3)
  31. 31. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. XML(4)
  32. 32. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. XML vs JSON
  33. 33. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Services  Web service is a software system designed to support machine-to- machine intraction over a network.  Web service are frequently just used to Internet Application Programming Interfaces(API).  Web service use HTTP for transmitting messages(RPC,SOAP,REST)
  34. 34. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. SOAP vs REST  SOAP(Simple Object Access Protocol) – Web service based on XML  REST(Representational State Transfer) – Web service represent in format of application
  35. 35. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. SOAP vs REST
  36. 36. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. SOAP Example Reference:: http://www.soapui.org/The-World-Of-API-Testing/soap-vs-rest- challenges.html
  37. 37. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. REST Example Reference:: http://www.soapui.org/The-World-Of-API-Testing/soap-vs-rest- challenges.html
  38. 38. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture Attack
  39. 39. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture Reference :: Web Application Hacking/Security 101(https://docs.google.com/presentation/d/1fw7fO7kmVTcfXuupGTezSM76cdQH3IbYos5xu95L yMs/edit#slide=id.p)
  40. 40. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Web Architecture Attack Reference :: Web Application Hacking/Security 101(https://docs.google.com/presentation/d/1fw7fO7kmVTcfXuupGTezSM76cdQH3IbYos5xu95L yMs/edit#slide=id.p)
  41. 41. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. OWASP 2013  Injection  Broken Authentication and Session Management  Cross-Site Scripting(XSS)  Insecure Direct Object Rerefence  Security Misconfiguration  Sensitive Data Exposure  Missing Function Level Access Control  Cross-Site Request Forgery(CSRF)  Using Components with Known Vulnerability  Unvalidated Redirects and Forwards
  42. 42. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Security Controls & Mechanism
  43. 43. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Security Control  Application Layer  Network Layer
  44. 44. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Application Layer  Input Validation  Sessions Management  Authentication Method  Strong Policy(Such as password policy)  Same-Origin Policy
  45. 45. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Network Layer  Firewall  Intrusion Detection System/Intrusion Prevention System(IDS/IPS)  Web Application Firewall(WAF)  Centralize Log Server
  46. 46. © Copyright 2013 i-secure Co., Ltd. The informationcontained herein is subject to change without notice. Network Layer Diagram Reference :: http://www.umv.co.kr/main_eng/sm_enterprise.php
  47. 47. www.i-secure.co.th Questions © Copyright 2013 ACIS i-secure Co., Ltd. The informationcontained herein is subject to change without notice.

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