bugtraq - Re: WU-FTPD 2.6.2 Freezer

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Message-ID: <20031031194044.GD27612@wirex.com>
Date: Fri, 31 Oct 2003 11:40:44 -0800
From: Seth Arnold <sarnold@...ex.com>
To: bugtraq@...urityfocus.com
Subject: Re: WU-FTPD 2.6.2 Freezer

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.

-- 
http://www.immunix.com/  secure Linux distributions and appliances

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