full-disclosure - Re: password hash, funny myth in the industry!

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Date: Wed, 17 Oct 2007 14:04:01 +0200
From: "Stephan G." <st@...rent.ch>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: password hash, funny myth in the industry!

All BitTorrent Trackers built on the tb-source use this scheme, when you 
login you recieve a cookie with your password hash, when someone steals 
the cookie/pw-hash they can steal that account... Funny sidenote, 
tb-source is ofter vulnerable to XSS

upb wrote:
> this would effectively make the password hash the password.
> Are you sure this scheme is used?:P
>
>
> On 10/16/07, *Bipin Gautam* <gautam.bipin@...il.com 
> <mailto:gautam.bipin@...il.com>> wrote:
>
>     hi list,
>     i was reading the article,
>     http://www.f-secure.com/weblog/archives/00001293.html
>     <http://www.f-secure.com/weblog/archives/00001293.html>
>     but just an example.
>
>     why do many people out there think password hash "can't be" as good as
>     the password itself and needs to be computed/cracked first before it
>     can be used?
>
>     Consider the fact, many websites/forums don't use password hash+salt,
>     just password hash( generally SHA1, MD5) that gets computer client
>     side and POSTED to the web-forum for user authentication.
>
>     If someone can sniff this, given that, user name is available using
>     simple GUI tools as 'Tamper Data' ( firefox plug in ) even a low tech
>     malicious user can log on with someones credentials without having to
>     crack the password hash, instead just using the password hash itself
>     manipulating the POST request.
>
>     makes sense? :)
>
>     thanks,
>     -bipin
>
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