Defeating SSL/TLS - Blackhat-09 Video

Marlinspike release SSLStrip tool to automate this attack. Using the SSLStrip tool Marlinspike was able to retreive over 130 usernames and passwords over a Tor network. These credentials were from sites such as Gmail, Yahoo, Linkedin, Paypal etc.

The way the SSLStrip tool works by:

• Does an MITM on the HTTP connection

• Replaces all the HTTPS links with HTTP ones but remembers the links which were changed

• Communicates with the victim client on an HTTP connection for any secure link

• Communicates with the legitimate server over HTTPS for the same secure link

• Communication is transparently proxied between the victim client and the legitimate server

• Images such as the favicon are replaced by images of the familiar "secure lock" icon, to build trust

• As the MITM is taking places all passwords, credentials etc are stolen without the Client knowing

This is the full video of the SSL attack demonstrated by Moxie at Blackhat this year.

"This presentation will demonstrate some new tools and techniques that allow attackers to silently alter, inject, and log traffic intended for secure transmission by SSL/TLS in common web applications such as online banking or secure webmail logins. It builds off of the SSL exploit tools and research on the failure of browsers to validate BasicConstraints that I published in 2002, and will include demonstrations of a new tool for exploiting current use patterns as well as some data gathered from field testing in the real world."

http://securitytube.net/Defeating-SSL-using-SSLStrip-(Marlinspike-Blackhat)-video.aspx