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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4AE21C53.9040702@lightwave.net.ru>
Date: Sat, 24 Oct 2009 01:12:51 +0400
From: Dan Yefimov <dan@...htwave.net.ru>
To: Matthew Bergin <matt.bergin@...mail.com>
Cc: bugtraq@...urityfocus.com
Subject: Re: /proc filesystem allows bypassing directory permissions on Linux

On 24.10.2009 0:35, Matthew Bergin wrote:
> doesnt look like the original owner is trying to write to it. Shows it
> cant, it had guest write to it via the proc folders bad permissions.
> Looks legitimate
>
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?
-- 

Sincerely Your, Dan.