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Date: Wed, 27 Mar 2024 13:57:12 -0700
From: nightmare.yeah27@...ecat.org
To: oss-security@...ts.openwall.com
Subject: Re: CVE-2024-28085: Escape sequence injection in util-linux wall
On Wed, Mar 27, 2024 at 11:00:00AM -0400, Skyler Ferrante (RIT Student) wrote:
> Wall-Escape (CVE-2024-28085)
> This allows unprivileged users to put arbitrary text on other
> users terminals, if mesg is set to y and wall is setgid. CentOS
> is not vulnerable since wall is not setgid. On Ubuntu 22.04 and
> Debian Bookworm, wall is both setgid and mesg is set to y by
> default.
I wonder how this comes about? I have looked around for a bit,
but the places that seemed relevant -- mostly /etc/default/devpts
and /etc/login.defs -- seem to show it should be 0600 by default.
Something somewhere overrides these, but I can't find that
something anywhere.
--
Ian
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