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Date:      Wed, 29 Jul 2020 19:13:15 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 248335] O_BENEATH leaks information about parent directories
Message-ID:  <bug-248335-227-jD9qZzOTOM@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-248335-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-248335-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248335

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |emaste@freebsd.org

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
I am not convinced that the discovered oracle is useful for anything.  It c=
an
only answer the question 'is given dirfd has such upper full path'.  So wha=
t ?

But even that, I do not see how it prevents code from opening and listing
arbitrary  directories by not using O_BENEATH, since you are not in the cap
mode.

I would prefer to see some (potential) real-world application of O_BENEATH =
that
is damaged by the behavior, before making any decision.

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