THC-SSL-DoS (New Attacking Tool Targets Web-Servers Using Secured Connections)

A newly released denial-of-service (DoS) tool can be used to bring down SSL servers using an average laptop computer and a standard DSL connection. Called THC-SSL-DoS,  the tool was created by German hacking outfit The Hackers Choice (THC) and exploits a rarely used, but widely available, feature in the SSL protocol called SSL renegotiation.


  • THC-SSL-DOS is a tool to verify the performance of SSL.
  • Establishing a secure SSL connection requires 15x more processing power on the server than on the client.
  • THC-SSL-DOS exploits this asymmetric property by overloading the server and knocking it off the Internet.
  • This problem affects all SSL implementations today. The vendors are aware of this problem since 2003 and the topic has been widely discussed.
  • This attack further exploits the SSL secure Renegotiation feature to trigger thousands of renegotiations via single TCP connection.
Counter Measurements:-
No real solutions exists. The following steps can mitigate (but not solve) the problem:
  • Disable SSL-Renegotiation
  • Invest into SSL Accelerator
Windows binary:
Unix Source   :    thc-ssl-dos-1.4.tar.gz

For more information click here


Voice Of GREYHAT is a non-profit Organization propagating news specifically related with Cyber security threats, Hacking threads and issues from all over the spectrum. The news provided by us on this site is gathered from various Re-Sources. if any person have some FAQ's in their mind they can Contact Us. Also you can read our Privacy Policy for more info. Thank You ! -Team VOGH
If you enjoyed VOGH News, Articles Then Do Make sure you to Subscribe Our RSS feed. Stay Tuned with VOGH and get Updated about Cyber Security News, Hacking Threads and Lots More. All our Articles and Updates will directly be sent to Your Inbox. Thank You! -Team VOGH

Categories: ,
Related Posts Plugin for WordPress, Blogger...