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

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Message-ID: <20060714173251.GM26570@osdn.org.ua>
Date: Fri, 14 Jul 2006 20:32:51 +0300
From: Michael Shigorin <mike@...n.org.ua>
To: bugtraq@...urityfocus.com
Subject: Re: Linux Kernel 2.6.x PRCTL Core Dump Handling -- Simple workaround

On Fri, Jul 14, 2006 at 04:50:19PM +0200, 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.

Better yet (generally), 

sysctl -w kernel.core_pattern=/dev/null
[ -f /etc/sysctl.conf ] && { grep -q ^kernel.core_pattern /etc/sysctl.conf || echo kernel.core_pattern = /dev/null >> /etc/sysctl.conf }

-- 
 ---- WBR, Michael Shigorin <mike@...linux.ru>
  ------ Linux.Kiev http://www.linux.kiev.ua/

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