linux-kernel - Re: Security: information leaks in /proc enable keystroke recovery

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Message-ID: <h67kou$ahr$1@taverner.cs.berkeley.edu>
Date:	Sun, 16 Aug 2009 00:44:14 +0000 (UTC)
From:	daw@...berkeley.edu (David Wagner)
To:	linux-kernel@...r.kernel.org
Subject: Re: Security: information leaks in /proc enable keystroke recovery

Theodore Tso  wrote:
> A configuration option which defaults to disabling ESP and EIP would
> be a simple way to prevent this specific instance of information
> leakage.  The problem is there are other files that might reveal
> timing information, but which are very useful for a system
> administrator.  A key example of this is /proc/$pid/wchan, which is
> responsible for the WCHAN column is a ps listing.

If they're useful for system administrators, would making them
readable to root (but not everyone) be enough?
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