linux-hardening - RE: [PATCH v3 2/2] tty: Allow TIOCSTI to be disabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 29 Jun 2023 13:23:54 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Samuel Thibault' <samuel.thibault@...-lyon.org>,
        Kees Cook <keescook@...omium.org>
CC:     Kees Cook <kees@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        Simon Brand <simon.brand@...tadigitale.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>,
        "Dave@...lke.cc" <Dave@...lke.cc>
Subject: RE: [PATCH v3 2/2] tty: Allow TIOCSTI to be disabled

From: Samuel Thibault
> Sent: 28 June 2023 07:07
...
> > So is there really no solution for brltty and TIOCSTI being disabled?
> 
> No, there is no way to simulate characters on the Linux console. The
> alternative would be to use uinput, but that simulates keycodes, not
> characters, thus requiring backtranslating first, which is very fragile.

It could probably be rewritten to use a pseudo-tty pair.
It might even be possible to emulate (the functionality of) TIOCSTI
in the relay process that handles the pseudo-tty.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)