linux-kernel - Re: [Security] [PATCH 00/20] world-writable files in sysfs and debugfs

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Message-ID: <20110315030956.GA2234@kroah.com>
Date:	Mon, 14 Mar 2011 20:09:56 -0700
From:	Greg KH <greg@...ah.com>
To:	James Bottomley <James.Bottomley@...e.de>
Cc:	Vasiliy Kulikov <segoon@...nwall.com>, security@...nel.org,
	acpi4asus-user@...ts.sourceforge.net, linux-scsi@...r.kernel.org,
	rtc-linux@...glegroups.com, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	open-iscsi@...glegroups.com, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [Security] [PATCH 00/20] world-writable files in sysfs and
 debugfs

On Mon, Mar 14, 2011 at 10:26:05PM -0400, James Bottomley wrote:
> On Sat, 2011-03-12 at 23:23 +0300, Vasiliy Kulikov wrote:
> > > Vasiliy Kulikov (20):
> > >  mach-ux500: mbox-db5500: world-writable sysfs fifo file
> > >  leds: lp5521: world-writable sysfs engine* files
> > >  leds: lp5523: world-writable engine* sysfs files
> > >  misc: ep93xx_pwm: world-writable sysfs files
> > >  rtc: rtc-ds1511: world-writable sysfs nvram file
> > >  scsi: aic94xx: world-writable sysfs update_bios file
> > >  scsi: iscsi: world-writable sysfs priv_sess file
> > 
> > These are still not merged :(
> 
> OK, so I've not been tracking where we are in the dizzying ride on
> security systems.  However, I thought we landed up in the privilege
> separation arena using capabilities.  That means that world writeable
> files aren't necessarily a problem as long as the correct capabilities
> checks are in place, right?

There are no capability checks on sysfs files right now, so these all
need to be fixed.

thanks,

greg k-h
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