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Date: Mon, 11 Mar 2024 16:09:43 +0100
From: Andreas Schwab <schwab@...e.de>
To: "Skyler Ferrante (RIT Student)" <sjf5462@....edu>
Cc: Alejandro Colomar <alx@...nel.org>, Thorsten Glaser <tg@...bsd.de>,
Rich Felker <dalias@...c.org>, musl@...ts.openwall.com, NRK
<nrk@...root.org>, Guillem Jover <guillem@...rons.org>,
libc-alpha@...rceware.org, libbsd@...ts.freedesktop.org, "Serge E.
Hallyn" <serge@...lyn.com>, Iker Pedrosa <ipedrosa@...hat.com>,
Christian Brauner <christian@...uner.io>
Subject: Re: Re: Tweaking the program name for <err.h> functions
On Mär 11 2024, Skyler Ferrante (RIT Student) wrote:
> It seems like this is the main thing shadow-utils (and other projects)
> should be concerned about. Every setuid/setgid program should check
> for fd 0,1,2 being open at the start of execution, and either abort or
> open new fds to /dev/null to prevent file descriptor omission attacks.
That's what glibc already does.
--
Andreas Schwab, SUSE Labs, schwab@...e.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
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