bugtraq - Re: Linux Kernel 2.6.x PRCTL Core Dump Handling -- Simple workaround

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Message-ID: <Pine.LNX.4.58.0607142106300.10538@gandalf.hugo.vanderkooij.org>
Date: Fri, 14 Jul 2006 21:08:46 +0200 (CEST)
From: Hugo van der Kooij <hvdkooij@...derkooij.org>
To: bugtraq@...urityfocus.com
Subject: Re: Linux Kernel 2.6.x PRCTL Core Dump Handling -- Simple workaround

On Fri, 14 Jul 2006, Caveo Internet BV - Security wrote:

> The most easy way to stop this vulnerability is this by sepcifying the core
> dump location
>
> echo /root/core > /proc/sys/kernel/core_pattern
>
> This specifies /root as core dump location which makes it unavailable for
> the local user.

This would be just shifting problems. /root is usually not that big. So
you end up with a core dump filling up your root disk. Not a pretty sight
I might add.

Either disable coredumps or send them to a place with plenty of diskspace
left and protect that one from prying eyes.

Hugo.

-- 
	I hate duplicates. Just reply to the relevant mailinglist.
	hvdkooij@...derkooij.org		http://hvdkooij.xs4all.nl/
		Don't meddle in the affairs of magicians,
		for they are subtle and quick to anger.