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Re: Linux kernel 0day - dynamite inside, don't burn your fingers
From: "Brian Jung Myeng Lee" <jm3lee () gmail com>
Date: Fri, 14 Jul 2006 23:15:49 -0400

This doesn't work on Ubuntu 6.06 LTS.

brian () ubuntu:~/tmp$ uname -a
Linux ubuntu 2.6.15-26-386 #1 PREEMPT Fri Jul 7 19:27:00 UTC 2006 i686
GNU/Linuxbrian () ubuntu:~/tmp$ ./a.out
/nfs/hd2/movies/Fight.Club.1999.avi

preparing
trying to exploit /nfs/hd2/movies/Fight.Club.1999.avi

sh-3.1$ whoami
brian


On 7/14/06, Iñaki Rodriguez [ackstorm] <irodriguez () ackstorm es> wrote:
El vie, 14-07-2006 a las 23:55 +0200, Dan B escribió:
> Hello,
>
> Joanna R. wrote:
> > Hello,
> >
> > attached 0day kernel 2.6 local root exploit. This is a new genuine
> > bug,  unpatched in 2.6.17.4 - don't get confused by prctl inside - it
> > is only used to change process status.

Tested on 2.6.17.4 - it works

> Tested on
>
> dan () n-box ~ $ uname -a
> Linux n-box 2.6.16-gentoo-r9 #1 Fri Jun 9 16:44:22 CEST 2006 i686
> Intel(R) Pentium(R) M processor 2.00GHz GNU/Linux
>
> dan () n-box ~ $ ./h00lyshit ./Media/Audio/DnB/TheEngineer_060331.mp3
>
> preparing
> trying to exploit ./Media/Audio/DnB/TheEngineer_060331.mp3
>
> sh-3.1# id
> uid=0(root) gid=100(users) groups=7(lp),10(wheel),18(audio),27(video),35(games),81(apache),100(users),7353(svnusers)
> sh-3.1# whoami
> root
> sh-3.1#
>
>
> > The code exploits a root race in /proc
>
> So it does :)
> >
> > have a nice day.
>
> But this means that I've gotta worry about more servers now! Dam it!
>
> And is there a workaround to protect against this attack?
>

Mount /proc as nosuid.

>
> Cheers,
> Dan.
>

Greetings

> _______________________________________________
> Full-Disclosure - We believe in it.
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--
---

Iñaki Rodríguez
irodriguez () ackstorm es
Departamento de Sistemas
ACK STORM, S.L.
Dedicated Hosting services
http://ackstorm.es


_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/



--
Brian Jung Myeng Lee
Homepage: http://koreanbrian.com

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/


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