bugtraq - Re: /proc filesystem allows bypassing directory permissions on Linux

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Message-ID: <4AE21EA6.5050002@buanzo.com.ar>
Date: Fri, 23 Oct 2009 18:22:46 -0300
From: "Arturo 'Buanzo' Busleiman" <buanzo@...nzo.com.ar>
To: Dan Yefimov <dan@...htwave.net.ru>
Cc: Matthew Bergin <matt.bergin@...mail.com>,
	bugtraq@...urityfocus.com
Subject: Re: /proc filesystem allows bypassing directory permissions on Linux

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Dan Yefimov wrote:
> Please tell me, who issued 'chmod 0666 unwritable_file'? Was that an
> attacker? No, that was the owner of 'unwritable_file', nobody else. What
> the 0666 file mode means? It means, that everybody can write to the
> file, can't he? So why do you believe that pretension legitimate?

I think he means the 0700 on the containing directory for the "unwritable_file".

- --
Arturo "Buanzo" Busleiman / Arturo Busleiman @ 4:900/107
Independent Linux and Security Consultant - SANS - OISSG - OWASP
http://www.buanzo.com.ar/pro/eng.html
Mailing List Archives at http://archiver.mailfighter.net
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