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QA Fest , Kyiv 2018
56K DoS
QA Fest , Kyiv 2018
Denys Zhevner
✖ Senior Troll QA;
✖ The prisoner of Azkaban
Enterprise;
✖ Open Source evangelist;
✖ Old good paranoid;
QA Fest , Kyiv 2018
DoS
}{@ckEr: я новый нюк нашел, ща всех
поубиваю!!!
}{@ckEr: дайте IP какого-нить лоха!!!
Tr011: 127.0.0.1
}{@ckEr: Пасиба! щас он подохнет!!!11
*}{@ckEr went offline.
© somewhere on the internet
QA Fest , Kyiv 2018
Agenda:
✘ DoS, DDoS;
✘ OSI;
✘ Level 7 DoS;
✘ Slow and Low;
✘ How it works?
✘ How to test?
✘ How to mitigate;
QA Fest , Kyiv 2018
DoS
QA Fest , Kyiv 2018
DDoS
QA Fest , Kyiv 2018
OSI
QA Fest , Kyiv 2018
Classic DDoS
QA Fest , Kyiv 2018
OSI
QA Fest , Kyiv 2018
Level 7 (HTTP) (D)DoS
QA Fest , Kyiv 2018
Slow and Low
QA Fest , Kyiv 2018
Slow and Low
QA Fest , Kyiv 2018
Affected web servers
QA Fest , Kyiv 2018
Types of attacks
Slow HTTP Post
(R-U-Dead-
Yet)
Slow Read Slow SSL
Slow Loris
(Slow headers)
QA Fest , Kyiv 2018
How does it work?
Open
connection
to the
server
Send partial
request
data/header
Never
complete
the request
QA Fest , Kyiv 2018
How does it work?
QA Fest , Kyiv 2018
“Features”
✘ Uses legitimate Level 4 (TCP) traffic;
✘ Mimics legitimate Level 7 (HTTP) traffic;
✘ Requires extremely low link bandwidth;
✘ Works with proxy, VPN, TOR, etc.
✘ Low local resources utilization;
✘ Cross tech, platforms, agentless;
✘ Scalable to other L7 protocols / apps;
QA Fest , Kyiv 2018
Tools to use
✘ Slow HTTP Test
✘ R.U.D.Y.
✘ OWASP HTTP Post Tool
✘ Slowloris
✘ Burp Suite
QA Fest , Kyiv 2018
Let’s try ;)
http://qafest.biz.tm
QA Fest , Kyiv 2018
Ways to mitigate
✘ Limit request body/headers size;
✘ Limit connections from one IP;
✘ Identify common legitimate requests speed;
✘ Increase maximum connections allowed;
✘ Use Reverse Proxy;
✘ Firewalls, load balancers, etc
QA Fest , Kyiv 2018
thanks!
Any questions?
You can find me at
denys.zhevner@globallogic.com
Skype: denis.zhevner
FaceBook: denis.v.zhevner

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QA Fest 2018. Денис Жевнер. 56k Denial of Service

  • 1. QA Fest , Kyiv 2018 56K DoS
  • 2. QA Fest , Kyiv 2018 Denys Zhevner ✖ Senior Troll QA; ✖ The prisoner of Azkaban Enterprise; ✖ Open Source evangelist; ✖ Old good paranoid;
  • 3. QA Fest , Kyiv 2018 DoS }{@ckEr: я новый нюк нашел, ща всех поубиваю!!! }{@ckEr: дайте IP какого-нить лоха!!! Tr011: 127.0.0.1 }{@ckEr: Пасиба! щас он подохнет!!!11 *}{@ckEr went offline. © somewhere on the internet
  • 4. QA Fest , Kyiv 2018 Agenda: ✘ DoS, DDoS; ✘ OSI; ✘ Level 7 DoS; ✘ Slow and Low; ✘ How it works? ✘ How to test? ✘ How to mitigate;
  • 5. QA Fest , Kyiv 2018 DoS
  • 6. QA Fest , Kyiv 2018 DDoS
  • 7. QA Fest , Kyiv 2018 OSI
  • 8. QA Fest , Kyiv 2018 Classic DDoS
  • 9. QA Fest , Kyiv 2018 OSI
  • 10. QA Fest , Kyiv 2018 Level 7 (HTTP) (D)DoS
  • 11. QA Fest , Kyiv 2018 Slow and Low
  • 12. QA Fest , Kyiv 2018 Slow and Low
  • 13. QA Fest , Kyiv 2018 Affected web servers
  • 14. QA Fest , Kyiv 2018 Types of attacks Slow HTTP Post (R-U-Dead- Yet) Slow Read Slow SSL Slow Loris (Slow headers)
  • 15. QA Fest , Kyiv 2018 How does it work? Open connection to the server Send partial request data/header Never complete the request
  • 16. QA Fest , Kyiv 2018 How does it work?
  • 17. QA Fest , Kyiv 2018 “Features” ✘ Uses legitimate Level 4 (TCP) traffic; ✘ Mimics legitimate Level 7 (HTTP) traffic; ✘ Requires extremely low link bandwidth; ✘ Works with proxy, VPN, TOR, etc. ✘ Low local resources utilization; ✘ Cross tech, platforms, agentless; ✘ Scalable to other L7 protocols / apps;
  • 18. QA Fest , Kyiv 2018 Tools to use ✘ Slow HTTP Test ✘ R.U.D.Y. ✘ OWASP HTTP Post Tool ✘ Slowloris ✘ Burp Suite
  • 19. QA Fest , Kyiv 2018 Let’s try ;) http://qafest.biz.tm
  • 20. QA Fest , Kyiv 2018 Ways to mitigate ✘ Limit request body/headers size; ✘ Limit connections from one IP; ✘ Identify common legitimate requests speed; ✘ Increase maximum connections allowed; ✘ Use Reverse Proxy; ✘ Firewalls, load balancers, etc
  • 21. QA Fest , Kyiv 2018 thanks! Any questions? You can find me at denys.zhevner@globallogic.com Skype: denis.zhevner FaceBook: denis.v.zhevner