full-disclosure - Re: Linux kernel exploit

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Message-ID: <BLU148-W1626AD75458091C94D4A4B42D0@phx.gbl>
Date: Wed, 8 Dec 2010 11:58:58 -0600
From: John Jacobs <flamdugen@...mail.com>
To: <dan.j.rosenberg@...il.com>, <full-disclosure@...ts.grok.org.uk>,
	<bugtraq@...urityfocus.com>
Subject: Re: Linux kernel exploit

> I've included here a proof-of-concept local privilege escalation exploit
> for Linux.  Please read the header for an explanation of what's going
> on.  Without further ado, I present full-nelson.c:

Hello Dan, is this exploitation not mitigated by best practice 
defense-in-depth strategies such as preventing the CAP_SYS_MODULE 
capability or '/sbin/sysctl -w kernel.modules_disabled=1' respectively? 
 It seems it'd certainly stop the Econet/Acorn issue.

Curious to hear your input as I fear too many rely solely on errata updates and not a good defense-in-depth approach.

> Happy hacking,
> Dan

Cheers,
John Jacobs

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