bugtraq - Re: [Full-disclosure] Linux kernel source archive vulnerable

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Message-ID: <Pine.LNX.4.64.0609080806550.16223@shalla.de>
Date: Fri, 8 Sep 2006 08:09:51 +0200 (CEST)
From: Christine Kronberg <seeker@...lla.de>
To: Raj Mathur <raju@...ux-delhi.org>
Cc: bugtraq@...urityfocus.com
Subject: Re: [Full-disclosure] Linux kernel source archive vulnerable

On Fri, 8 Sep 2006, Raj Mathur wrote:
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>>>>>> "Hadmut" == Hadmut Danisch <hadmut@...isch.de> writes:
>
>    Hadmut> [snip]
>
>    Hadmut> When unpacking such an archive, tar also sets the uid,
>    Hadmut> gid, and file permissions given in the tar
>    Hadmut> archive. Unfortunately, plenty of files and directories in
>    Hadmut> that archive are world writable. E.g. in the 2.6.17.11
>    Hadmut> archive, there are 1201 world writable directories and
>    Hadmut> 19554 world writable files.
>
> I wouldn't know if something has changed drastically between 2.6.16
> and 2.6.17.11, but:
>
> raju@...l:~$ find /usr/src/linux-2.6.16/ -perm -666 ! -type l
> raju@...l:~$
>
> Not a single world-writable file or directory.  Perhaps pre-release
> kernel tarballs are more lax?

   Seems to. I just checked linux-2.6.13 and linux-2.6.17.6. While the
   first has no world writeable files or directories at all the latter
   has tons of it. Interesting.

   Cheers,

   Chris Kronberg.