Bypassing DRM Protections at Content Delivery Networks

•

2 recomendaciones•2,571 vistas

Adrian Villa Bermudez

Slides of the Rooted 2015 conference

Internet

Bypassing DRM Protections
at Content Delivery
Networks
Adrián Villa Bermúdez
@AdriVillaB

# whoami
• @AdriVillaB
• Computer Engineering graduate
• Pentester @ Tarlogic

Scope
• OTT configuration flaws
• Objetive
– Distribution of protected content
– Own players

Disclaimer
SQLi or other injection stuff
Privilege scalation
Steal user credentials
Economic proffit
Review implementation and configuration

OTT infraestructure
• Over-the-Top technologies
– Video on Demand
– Channel live streaming
• Content distribution over CDN
• Content protection using DRM

HTTP Dynamic Streaming
• Delivery streaming content over HTTP
• F4V
– De facto standard

Orange TV
• Preproduction analysis
• Microsoft Smooth Streaming
• IP-based DRM
– X-Forwarded-For?

Nubeox
• Limit number of devices
• Crossdomain.xml
• Decompile original player
– Device ID generation
• Extra ball
– “Pass the hash”

Wuaki.tv
• IP-based DRM
– X-Forwarded-For
– True-Client-IP

Netflix
• NCCP
• RSA & HMAC
• Obfuscate Silverlight player
• Tamper DLLs

Conclusions
• Delegate business logic on the server side
• Not trust HTTP proxy headers
• Implement protections access content
• Obfuscate source code

Thank you
• Special thanks:
– @Tarlogic
– @RootedCON
@AdriVillaB
Adrian.Villa@Tarlogic.com

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Bypassing DRM Protections at Content Delivery Networks

1. Bypassing DRM Protections at Content Delivery Networks Adrián Villa Bermúdez @AdriVillaB

2. # whoami • @AdriVillaB • Computer Engineering graduate • Pentester @ Tarlogic

3. Scope • OTT configuration flaws • Objetive – Distribution of protected content – Own players

4. Disclaimer SQLi or other injection stuff Privilege scalation Steal user credentials Economic proffit Review implementation and configuration

5. Disclaimer

6. OTT infraestructure • Over-the-Top technologies – Video on Demand – Channel live streaming • Content distribution over CDN • Content protection using DRM

7. How it works

8. How it works

9. HTTP Dynamic Streaming • Delivery streaming content over HTTP • F4V – De facto standard

10. Analysis

11. Orange TV • Preproduction analysis • Microsoft Smooth Streaming • IP-based DRM – X-Forwarded-For?

12. Orange TV

13. Nubeox • Limit number of devices • Crossdomain.xml • Decompile original player – Device ID generation • Extra ball – “Pass the hash”

14. Nubeox • Limit number of devices • Crossdomain.xml • Decompile original player – Device ID generation • Extra ball – “Pass the hash”

15. Nubeox

16. Wuaki.tv • IP-based DRM – X-Forwarded-For – True-Client-IP

17. Wuaki.tv • IP-based DRM – X-Forwarded-For – True-Client-IP

18. Wuaki.tv

19. TotalChannel • Smooth Streaming

20. TotalChannel • Smooth Streaming

21. TotalChannel

22. Netflix • NCCP • RSA & HMAC • Obfuscate Silverlight player • Tamper DLLs

23. Videoclub: PitM

24. Videoclub: PitM

25.

26. Conclusions • Delegate business logic on the server side • Not trust HTTP proxy headers • Implement protections access content • Obfuscate source code

27. Thank you • Special thanks: – @Tarlogic – @RootedCON @AdriVillaB Adrian.Villa@Tarlogic.com

Notas del editor

OTT configuration flaws Delegate on the client side HTTP proxy headers
Las peticiones al DRM y al CDN se hacen sin cookies
Manifest -> F4M file Segments -> F4F file
Crossdomain.xml *.nubeox.com *.casadellibro.com RABCDASM
Crossdomain.xml *.nubeox.com *.casadellibro.com RABCDASM
Crossdomain.xml *.nubeox.com *.casadellibro.com RABCDASM

Bypassing DRM Protections at Content Delivery Networks

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