full-disclosure - Re: Linux kernel exploit

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20101208142656.GC3976@suse.de>
Date: Wed, 8 Dec 2010 15:26:56 +0100
From: Marcus Meissner <meissner@...e.de>
To: Kai <kai@...nn.net>
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Re: Linux kernel exploit

On Wed, Dec 08, 2010 at 12:44:09AM +0300, Kai wrote:
> 
>  > Anyone tested this in sandbox yet?
> 
> 00:37 linups:../expl/kernel > cat /etc/*release*
> openSUSE 11.3 (i586)
> VERSION = 11.3
> 00:37 linups:../expl/kernel > uname -r
> 2.6.34.4-0.1-desktop
> 00:37 linups:../expl/kernel > gcc _2.6.37.local.c -o test
> 00:37 linups:../expl/kernel > ./test
> [*] Failed to open file descriptors.

openSUSE 11.2 and 11.3 do not have ECONET compiled,
openSUSE 11.1 has ECONET, but not the 0 ptr deref issue.

The CVE-2010-4258 problem is however in all openSUSEs.

Temporary workaround (for all distributions, not just openSUSE):
	echo 1 > /proc/sys/kernel/panic_on_oops
This will now panic the machine instead of making it exploitable.

Ciao, Marcus

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