full-disclosure - Re: Linux Kernel 2.6.x PRCTL Core Dump Handling - Local r00t Exploit ( BID 18874 / CVE-2006-2451 )

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Message-ID: <20060712193157.1b41110b.advisory@dyadsecurity.com>
Date: Thu Jul 13 03:31:38 2006
From: advisory at dyadsecurity.com (advisory)
Subject: Re: Linux Kernel 2.6.x PRCTL Core Dump Handling
	- Local r00t Exploit ( BID 18874 / CVE-2006-2451 )


it would help if the exploit bothered to invoke bash (/bin/sh on almost all linux distros)
with -p so that it didnt drop euid root. There are alot of reasons why this shouldnt
work on selinux, using a strict policy, other than (file?) contexts.

"\n* * * * * root /bin/sh /tmp/commands_to_run_as_root.sh;exit;\n" might work better as
a payload.

<3
advisory.

On Thu, 13 Jul 2006 01:23:10 +0300
Ariel Biener <ariel@...t.tau.ac.il> wrote:

> On Wednesday 12 July 2006 03:15, Roman Medina-Heigl Hernandez wrote:
> 
> Ignore my previous post, it does create a setuid bash version in /tmp/sh, the 
> reason it doesn't work is due to SELinux contexts.
> 
> --Ariel
> > Maybe this is obvious for Paul Starzetz (as well as many other people) but
> > full-disclosure is not really "full" without exploit code.
> >
> > Working exploit attached. You can also download it from:
> > http://www.rs-labs.com/exploitsntools/rs_prctl_kernel.c
> >
> > Greetz to !dSR ppl :-)
> 
> -- 
>  --
>  Ariel Biener
>  e-mail: ariel@...t.tau.ac.il
>  PGP: http://www.tau.ac.il/~ariel/pgp.html
> 
> _______________________________________________
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> 


-- 
Jack
- jack@...turesecurity.org