Re: [Full-disclosure] 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@xxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxx
PGP: http://www.tau.ac.il/~ariel/pgp.html

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--
Jack
- jack@xxxxxxxxxxxxxxxxxxx

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