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Date: Mon, 6 Jun 2011 13:22:02 -0400 (EDT)
From: Josh Bressers <>
Cc: Russell Coker <>, Daniel Ruoso <>,
        "Steven M. Christey" <>
Subject: Re: CVE request -- coreutils -- tty hijacking
 possible in "su" via TIOCSTI ioctl

----- Original Message -----
> Hello Josh, Steve, vendors,
> based on Debian BTS report:
> [1]
> (first CVE-2011-XXYY required for Debian case)
> looked more into original report:
> [2]
> and the first paragraph of [2] suggests:
> "When starting a program via "su - user -c program" the user session
> can escape to the parent session by using the TIOCSTI ioctl to push
> characters into the input buffer. This allows for example a non-root
> session to push "chmod 666 /etc/shadow" or similarly bad commands into
> the input buffer such that after the end of the session they are
> executed."
> this should get a CVE-2005-YYZZ CVE id.

This really shouldn't get a CVE id. It's well known, and sadly not easy to
fix. There are more details in this bug:

I would classify this as an administration issue, not a flaw in su or sudo.
If you're running arbitrary things, you're in far more trouble than this.

I'm happy to let MITRE overrule me.


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