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Re: Linux kernel 0day - dynamite inside, don't burn your fingers
From: Iñaki "Rodriguez [ackstorm]" <irodriguez () ackstorm es>
Date: Sat, 15 Jul 2006 01:05:06 +0200

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

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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/


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