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Date: Wed, 13 Oct 2021 01:16:30 -0500
From: "A. Wilcox" <>
Subject: Re: get/set*ent functions and real world applications

On Oct 11, 2021, at 12:41 PM, √Črico Nogueira <> wrote:
> Things in /etc
> can, theoretically, only be written to by root or at least trusted
> users, so treating as entirely untrusted seems a bit over the top...

My understanding is that tcb exists explicitly to make these files modifiable by non-root users, to make the shadow tools unprivileged.

I don't recall if GECOS or group fields are included in tcb, or if it is only the password itself.  If the other fields are included, this is a much more important bug than otherwise.

A. Wilcox (Sent from my iPhone)
Mac, iOS, Linux software engineer

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