bugtraq - Re: WU-FTPD 2.6.2 Freezer

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Message-ID: <20031101144736.GG875@percy.comedia.it>
Date: Sat, 1 Nov 2003 15:47:36 +0100
From: Luca Berra <bluca@...edia.it>
To: bugtraq@...urityfocus.com
Subject: Re: WU-FTPD 2.6.2 Freezer


On Fri, Oct 31, 2003 at 11:40:44AM -0800, Seth Arnold wrote:
>On Fri, Oct 31, 2003 at 02:55:43PM -0000, Angelo Rosiello wrote:
>> 	for( i=0; i<loop; i++ )
>> 	{
>> 		write( sd, "LIST -w 1000000 -C\n", 19 );
>> 	}
>
>It is probably worth pointing out that it is FSF ls(1) at fault here;
>wu-ftpd just provides a convenient way for potentially unauthenticated
>users to DoS the machine. If your OS supports rlimits (ulimit(3)), I
>believe they will provide reliable protection against this problem.

it might be also worth noting that wu-ftpd can be rebuilt with internal
ls code.

regards,
L.

-- 
Luca Berra -- bluca@...edia.it
        Communication Media & Services S.r.l.
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