linux-kernel - Re: [PATCH] Audit: Add TTY input auditing

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Message-ID: <713627.48330.qm@web36601.mail.mud.yahoo.com>
Date:	Thu, 7 Jun 2007 15:32:04 -0700 (PDT)
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	Jan Engelhardt <jengelh@...putergmbh.de>,
	Miloslav Trmac <mitr@...hat.com>
Cc:	Steve Grubb <sgrubb@...hat.com>, dwmw2@...radead.org,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...hat.com>,
	Alexander Viro <aviro@...hat.com>
Subject: Re: [PATCH] Audit: Add TTY input auditing


--- Jan Engelhardt <jengelh@...putergmbh.de> wrote:


> Someone please enlighten me why a regular keylogger² that captures
> both input and output could not do the same. (Auditing what one has done.)

1. shell aliases
   # innocuous -p 0 
2. shell variables
   # $INNOCUOUS -p 0
3. symlinks
   # ./innocuous -p 0

Yes, I know there are ways to prevent each of these "attacks",
but it's surprising how often simple textual changes are effective
in hiding behavior.


Casey Schaufler
casey@...aufler-ca.com
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