Vulnerability Development mailing list archives
Re: CSS, CSS & let me give you some more CSS
From: "E M" <rdnktrk () hotmail com>
Date: Fri, 01 Feb 2002 11:13:43 -0800
I think we are getting away from the original topic, CSS and how it effects you.
Basically the general agreement is that cookie stealing via embedded code is the most dangerous use for CSS and the most common.
This brings me to the point that cookie based authentication is unsafe inherently and as far as I can tell not something that security minded developers would even consider.
So the jist is that CSS is mainly used to exploit older web app's that use cookie based authentication (Prime example older versions of Yet another Bulletin Board (Yabb). Not to say it can't be used for other things, just that from what I'm seeing... its not.
Eric McCarty
From: "Bill Pennington" <billp () boarder org> To: "Securityfocus-Vulndev" <vuln-dev () securityfocus com> Subject: Re: CSS, CSS & let me give you some more CSS Date: Fri, 1 Feb 2002 08:38:35 -0800 For any commercial site it is almost impossible to use any portion of theaddress for "authentication" or non-repudiation. The main reason is AOL. Thelast 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 andsometime 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 presenta 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 >
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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)
- RE: CSS, CSS & let me give you some more CSS Brian McWilliams (Feb 01)