From: Serg B (sergeslists@gmail.com)
Date: Tue Mar 18 2008 - 21:07:12 EST
Jerry,
You are partially correct, in some cases this would not be possible.
However, generally speaking this is a solution.
See http://www.owasp.org/index.php/Session_Management, section 8.2:
How to protect yourself.
Serg
On Wed, Mar 19, 2008 at 10:38 AM, Shenk, Jerry A
<jshenk@decommunications.com> wrote:
> Sometimes, tying an http session to an IP address will incorrectly kick
> users out who are going through proxies. AOL traffic causes this at
> times by switching proxies. Since HTTP is a protocol that makes lots of
> different connections, the browser can easily (but not often) change IP
> addresses during a session.
>
> The fact that each HTTP connection is a different IP session makes using
> ports in the session management a problem too....in fact, I don't see
> how that would work at all.
>
>
>
> -----Original Message-----
> From: listbounce@securityfocus.com [mailto:listbounce@securityfocus.com]
> On Behalf Of Serg B
> Sent: Tuesday, March 18, 2008 6:42 PM
> To: 11ack3r
> Cc: pen-test@securityfocus.com
> Subject: Re: Session Hijacking over HTTP
>
> To protect session cookies you can set the cookie property: to send
> only over SSL. Also, regenerate SID after the user has authenticated
> to the application - this will safe guard their account in case the
> SID was compromised prior to authentication. The SID itself should be
> custom generated and include a digest of the following client
> properties (can be more, this is the minimum): IP address, port
> number, agent string. This way a session will be tied to a particular
> machine and user. This is the industry best practice.
>
> Don't worry about building "custom browser or enterprise solution"
> since it will only complicate things and get you hacked, remember the
> KISS principle. This is of course excluding the fact that it sounds
> like a complete bandaid solution to a problem that should be solved at
> design or implementation stage of the SDLC. In regards to the "trusted
> channel" - SSL is about as trusted a it gets (excluding my uber army
> of specially trained carrier pidgins of course).
>
> Serg
>
>
> On Tue, Mar 18, 2008 at 10:21 PM, 11ack3r <11ack3r@gmail.com> wrote:
> > Hello Everyone,
> >
> > I was curious to know how would webmail portals like gmail.com and
> > yahoo.com protect their users from session hijacking when they use
> > HTTP after authentication.
> >
> > As I see it is trivial to capture traffic over the wire including
> > session cookies. In such a case can an attacker just reuse the
> session
> > cookies in his/her browser and compromise the user account?
> >
> > WHat is the best way to protect session cookies from hijacking esp.
> > due to network eavesdropping? Of course HTTPS can also be bypassed
> > with MITM attacks if users ignore browser warnings.
> >
> > Looking forward to some knowledge here.
> >
> > Cheers!!
> >
> >
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