Re: SPAM-LOW: passw0rd trial limit

[Christopher Schwardt <nookieman () gmx de>]

Hi,

well a lil countermeasure is increase the delay it takes to answer the
login process the more requests are send. But in the end this method got
nearly the same drawbacks, and makes it easier for attackers (they may
try more often than in an 2 hour block).

The ban of IP's was already mentioned, and so was the workaround.

You may show the person who logs in the number of failed logins so he
will notice if someone is trying to brute-force his account. Therefore u
need users who are aware of this, and are willing to pass this
information to an admin or whoever is in charge of this kinda stuff.
Then the attack may even be tracked down, if the brute-force process is
discovered soon.

Chriz


> Hey,
>
> Disabling users is a kind of control that many companies use as
> countermeasure for brute force attacks.
>
> Can any one tell me, what are the other controls to prevent such kind of
> attack?
>
> Mohsin Ahmed
>
> -----Original Message-----
> From: ceyhun [mailto:jhun39 () gmail com] 
> Sent: Saturday, June 24, 2006 3:40 AM
> To: pen-test () lists securityfocus com
> Subject: SPAM-LOW: passw0rd trial limit
>
> hi
>
> i am trying to pen test a web site
>
> site has a login page and all the usernames are known
> the passw0rd length is fixed and 6 characters long
>
> i think with a brute force attack it wold be easy to login as any user,
>
> but the problem is when a user enters wrong paaw0rd more than five times
> he/she can only login for aboout 2 hours later
>
> how this obstacle can be overcomed do you have any idea?
>
> by the way remote server accepts another user login wehther you have 
> exceeded trial limit or not
> so i think it is not related with the ip filtering
>
>
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This List Sponsored by: Cenzic

Concerned about Web Application Security? 
Why not go with the #1 solution - Cenzic, the only one to win the Analyst's 
Choice Award from eWeek. As attacks through web applications continue to rise, 
you need to proactively protect your applications from hackers. Cenzic has the 
most comprehensive solutions to meet your application security penetration 
testing and vulnerability management needs. You have an option to go with a 
managed service (Cenzic ClickToSecure) or an enterprise software 
(Cenzic Hailstorm). Download FREE whitepaper on how a managed service can 
help you: http://www.cenzic.com/news_events/wpappsec.php 
And, now for a limited time we can do a FREE audit for you to confirm your 
results from other product. Contact us at request () cenzic com for details.
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