Vulnerability Development mailing list archives
Re: CSS, CSS & let me give you some more CSS
From: "Bill Pennington" <billp () boarder org>
Date: Fri, 1 Feb 2002 08:38:35 -0800
For any commercial site it is almost impossible to use any portion of the address for "authentication" or non-repudiation. The main reason is AOL. The last e-com site I managed 70% or our traffic came from AOL. IIRC AOL used proxy "pods" for their netblocks. I would watch users hop from IP to IP and sometime across entire subnets during a session. Now you could code your app to break for AOL users but if you are a commercial entity that could present a few problems. The best use to IP address authentication is in a LAN environment where users are far less likely to go address hoping. ----- Original Message ----- From: <info () elitesoft org> To: "Obscure" <obscure () eyeonsecurity net> Cc: "Joe Harrison" <list-general () ntlworld com>; "Securityfocus-Vulndev" <vuln-dev () securityfocus com> Sent: Friday, February 01, 2002 8:08 AM Subject: RE: CSS, CSS & let me give you some more CSS
If you use IP address for session cookie attacker can't use stolen cookie. However, you can't use IP address when BGP or Proxy are used. In this case the best protection is to change session cookie for each transaction using transaction counter. This will provide a transaction non-repudiation. If such session cookie is stolen and used by a hacker prior to a user, then user session will be blown away. Mike
Current thread:
- RE: CSS, CSS & let me give you some more CSS Obscure (Jan 31)
- <Possible follow-ups>
- RE: CSS, CSS & let me give you some more CSS info (Feb 01)
- Re: CSS, CSS & let me give you some more CSS Bill Pennington (Feb 01)
- Re: CSS, CSS & let me give you some more CSS E M (Feb 01)
- Re: CSS, CSS & let me give you some more CSS Sverre H. Huseby (Feb 01)
- New thoughts on CSS Brett Moore (Feb 01)
- RE: New thoughts on CSS Matt Dickinson (Feb 01)
- RE: New thoughts on CSS jon schatz (Feb 01)
- Re: New thoughts on CSS Blue Boar (Feb 01)
- Re: New thoughts on CSS Jonas M Luster (Feb 03)
- RE: New thoughts on CSS other (Feb 02)
- Re: CSS, CSS & let me give you some more CSS Blake Frantz (Feb 01)
- Re: CSS, CSS & let me give you some more CSS Andre Mariƫn (Feb 04)