full-disclosure - Re: Linux kernel source archive vulnerable

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Message-ID: <20060908105315.GA11082@danisch.de>
Date: Fri, 8 Sep 2006 12:53:15 +0200
From: hadmut@...isch.de (Hadmut Danisch)
To: Lee Ball <lee@...ective-it.co.uk>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Linux kernel source archive vulnerable

On Fri, Sep 08, 2006 at 11:44:02AM +0100, Lee Ball wrote:
> 
> Sorry to add my 2 pence worth but I noticed that Raj ran his command as
> a normal user and you Hadmut have ran yours as root. Isn't it going to
> be ok as the directories above these world writeable files aren't
> writeable/readable by a non-superuser?

Actually it wasn't my own computer where I found the problem. I was
performing some security checks on a customer machine and found these
open directories, so it was someone else's machine.

No, this is not correct. Even if /usr/src is not world writable, you
can write into those subdirectories and files. 

Just think about it: Otherwise you could not write any file into your
home directory since /home is not world writable.

regards
Hadmut

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