linux-kernel - Re: Upstream first policy

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:	Tue, 9 Mar 2010 03:09:11 +0100
From:	Luca Barbieri <luca.barbieri@...il.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>, James Morris <jmorris@...ei.org>,
	linux-kernel@...r.kernel.org, Kyle McMartin <kyle@...artin.ca>,
	Alexander Viro <viro@....linux.org.uk>
Subject: Re: Upstream first policy

> <sarcasm>
> Yeah, especially when it's read by sshd.  Who cares, indeed?  So it's got
> a passwordless root, that's even better, right?  Nobody will see your
> real root password that way...
> </sarcasm>

Not sure what you mean exactly.
You won't have a passwordless root if you don't allow anyone to modify
the file at /etc/shadow, or change that dentry by deleting a file
there or putting an arbitrary file there (with creat, rename or link).
This is conceptually a path-based security check.

It is also separate from the problem of not giving anyone knowledge of
the root password or hash of it, which a conceptually content-based
security check on reads.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/