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Date: Tue, 14 Mar 2023 11:46:33 +0100
From: Peter Bex <>
Subject: Re: TTY pushback vulnerabilities / TIOCSTI

On Tue, Mar 14, 2023 at 09:51:03AM +0100, Hanno Böck wrote:
> This seems to be the only real mitigation for this issue. It appears
> su has a parameter, and in sudo one can configure the creation of a new
> pty in the sudoers file. I don't consider these as satisfying fixes, as
> they are optinal, and thus rely on the expectation that users are aware
> of this risk and manually use these mitigations. That does not seem
> realistic to me.

Indeed, opendoas (the portable version of OpenBSD's "doas") has this
exact bug as well:


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