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Date:      Sat, 30 May 2009 09:20:44 +0100
From:      Chris Rees <utisoft@googlemail.com>
To:        Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
Cc:        perryh@pluto.rain.com, freebsd-questions@freebsd.org
Subject:   Re: Remotely edit user disk quota
Message-ID:  <b79ecaef0905300120l79aee6ei126cc1c907494080@mail.gmail.com>
In-Reply-To: <alpine.BSF.2.00.0905291249220.10254@wojtek.tensor.gdynia.pl>
References:  <200905281030.n4SAUXdA046386@banyan.cs.ait.ac.th>  <200905280847.12966.kirk@strauser.com> <alpine.BSF.2.00.0905281553001.60364@wojtek.tensor.gdynia.pl>  <200905280904.44025.kirk@strauser.com> <20090528183801.82b36bbb.freebsd@edvax.de>  <alpine.BSF.2.00.0905282129560.61809@wojtek.tensor.gdynia.pl>  <4a1f9cf7.UEl7lAiK4FGe5eG7%perryh@pluto.rain.com> <alpine.BSF.2.00.0905291249220.10254@wojtek.tensor.gdynia.pl>

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2009/5/29 Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>:
>> Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote:
>>
>>> Even 15 seconds of thinking is enough to understand that logging
>>> to other user and then su - gives completely no extra security.
>>
>> I don't buy this, given that root's login name is well known :)
>
> if someone can intercept the passwords you type, then he/she will intercept
> both user password you log in and then su password you type.
>
> He/she actually can gain more if you use su, as you may use the same user
> password somewhere else.

But we're talking about vulnerability to dictionary and brute-force
attacks. You'd have to first:

Ascertain a username in the wheel group.

Brute-force that password.

THEN, you need to brute-force root's password.

Chris



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