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Slipping Past the Firewall

Slipping Past the Firewall. DNS Rebinding with Pure Java Applets. Billy K Rios (BK) and Nate McFeters. Implications of DNS Rebinding Attacks The Attack Demo Final Thoughts Questions?. Overview. Some Thoughts about Firewalls “I prefer pwning the server :p” Client Side Technologies

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Slipping Past the Firewall

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  1. Slipping Past the Firewall DNS Rebinding with Pure Java Applets Billy K Rios (BK) and Nate McFeters

  2. Implications of DNS Rebinding Attacks The Attack Demo Final Thoughts Questions? Overview

  3. Some Thoughts about Firewalls “I prefer pwning the server :p” Client Side Technologies Heavy Doors with Open Windows Sun Tzu was a Hacker…. Implication of DNS Rebinding Attacks

  4. JavaScript Sockets?!?! Flash Sockets! LiveConnect (Firefox and other Gecko Based Browsers) Sockets! Implication of DNS Rebinding Attacks

  5. David Bryne Java Applets? ….. Actually LiveConnect (Firefox only!) Why JAVA Applets?

  6. Princeton Computer Science PHDs? Why JAVA Applets?

  7. Sockets! Abstraction Libraries / Classes JDBC SSL Others Remote Control over Java Applet Why JAVA Applets?

  8. The Attack - Setup Oracle DB XSSd Web Site The Internet Attacker Victim

  9. The Attack - Setup

  10. The Attack - Setup

  11. The Attack - Setup

  12. The Attack - Setup

  13. The Attack - Setup

  14. The Attack - Setup

  15. The Attack - Setup

  16. The Attack - Setup

  17. The Attack - Setup

  18. The Attack - Setup

  19. The Attack - Setup

  20. The Attack - Setup

  21. The Attack - Setup

  22. The Attack - Setup

  23. The Attack - Setup

  24. Close The Browser Closing the Browser Destroys the Instance of the JVM Applet Remains cached till 2010 Call an External Java Supported Application Firefoxurl, Navigatorurl, Picasa… Each Application has its own instance of the JVM Applet Remains cached till 2010 Load Different Versions of the JRE Somewhat limited in newer versions of the JVM Maybe removed in the future Applet Remains cached till 2010 The Attack - Setup

  25. The Attack

  26. The Attack

  27. The Attack

  28. The Attack

  29. The Attack

  30. The Attack

  31. The Attack

  32. The Attack

  33. Script Src Remote JavaScript is loaded Via Script Src Dynamic Content (Despite Caching) JavaScript / Java Applet Interaction Public Methods Public Variables Remote Control Through an XSS Proxy (XS-Sniper) Remotely Controlling the Applet

  34. DEMO

  35. Questions and Final Thoughts

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