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diff --git a/zarb-ml/mageia-dev/2012-April/014879.html b/zarb-ml/mageia-dev/2012-April/014879.html new file mode 100644 index 000000000..084f8c288 --- /dev/null +++ b/zarb-ml/mageia-dev/2012-April/014879.html @@ -0,0 +1,151 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML> + <HEAD> + <TITLE> [Mageia-dev] Handling single user/rescue/failsafe mode + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Handling%20single%20user/rescue/failsafe%20mode&In-Reply-To=%3CCA%2Bh4nj4%3DrAUgzXKDSmiKFNmVv0aRJ_3bVUJH3ixa5WP%2B06WpuQ%40mail.gmail.com%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="014877.html"> + <LINK REL="Next" HREF="014880.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Mageia-dev] Handling single user/rescue/failsafe mode</H1> + <B>Wolfgang Bornath</B> + <A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Handling%20single%20user/rescue/failsafe%20mode&In-Reply-To=%3CCA%2Bh4nj4%3DrAUgzXKDSmiKFNmVv0aRJ_3bVUJH3ixa5WP%2B06WpuQ%40mail.gmail.com%3E" + TITLE="[Mageia-dev] Handling single user/rescue/failsafe mode">molch.b at googlemail.com + </A><BR> + <I>Thu Apr 26 14:22:31 CEST 2012</I> + <P><UL> + <LI>Previous message: <A HREF="014877.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI>Next message: <A HREF="014880.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#14879">[ date ]</a> + <a href="thread.html#14879">[ thread ]</a> + <a href="subject.html#14879">[ subject ]</a> + <a href="author.html#14879">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>2012/4/26 Colin Guthrie <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>>: +><i> 'Twas brillig, and Wolfgang Bornath at 26/04/12 12:05 did gyre and gimble: +</I>>><i> 2012/4/26 Guillaume Rousse <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">guillomovitch at gmail.com</A>>: +</I>>>><i> Le 26/04/2012 12:12, Thierry Vignaud a écrit : +</I>>>><i> +</I>>>>><i> On 26 April 2012 11:38, Colin Guthrie<<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>>  wrote: +</I>>>>>><i> +</I>>>>>><i> It seems that in mga1 single user mode just gave a shell without +</I>>>>>><i> requiring root password. +</I>>>>>><i> +</I>>>>>><i> I'm not sure when this was added, but in the initscripts changelog, I +</I>>>>>><i> see it has come from the big mdvconf patch[1]. +</I>>>>>><i> +</I>>>>>><i> Can anyone remember the reason for this (perhaps it was related to tcb +</I>>>>>><i> support?) and whether or not we should do the same thing in systemd +</I>>>>>><i> which currently (now that I've fixed it) uses whatever SINGLE says in +</I>>>>>><i> /etc/sysconfig/init. +</I>>>>><i> +</I>>>>><i> +</I>>>>><i> This has been like this forever... +</I>>>>><i> At least for the past decade. +</I>>>>><i> I think other distros do/did it too. +</I>>>><i> +</I>>>><i> Some of them force the use of a password for single mode. Given the ease of +</I>>>><i> bypassing it through init=/bin/sh, unless the bootloader is also protected, +</I>>>><i> I'm a bit sceptic about the interest. +</I>>><i> +</I>>><i> For ages (Mandrakelinux/Mandriva) it has been +</I>>><i> +</I>>><i> SINGLE=/sbin/sushell +</I>><i> +</I>><i> Yes, but inittab itself just referenced /bin/sh (thus not caring what +</I>><i> SINGLE variable was set to). +</I>><i> +</I>>><i> as default. IMHO this default setting is a security issue. Someone +</I>>><i> with access to your machine (in an office or whereever) can simply +</I>>><i> turn it on (or first turn it off with the power button), select +</I>>><i> failsafe from the boot menue and has all the privileges he wants +</I>>><i> without any hurdles to jump. So I've been advocating to change this +</I>>><i> entry in /etc/sysconfig/init. +</I>>><i> +</I>>><i> I've been also recommending users to change the matching line in +</I>>><i> /etc/inittab accordingly: +</I>>><i> +</I>>><i> #Single user mode +</I>>><i> ~~:S:wait:/sbin/sulogin +</I>>><i> +</I>>><i> which does the same. Unfortunately Mandrake/Mandriva developpers did +</I>>><i> not share my view. +</I>><i> +</I>><i> As Guillaume pointed out, if they have physical access, you can also +</I>><i> just pass init=/bin/sh to the kernel prompt, so I see little real +</I>><i> security benefit here (it maybe raises the bar slightly, but insecure is +</I>><i> insecure). +</I> +I heard that argument before, so I'm used to it. +With the default settung nobody needs to be a wizard to switch on the +computer and select the failsafe mode. With that little bar you have +to know how to get to the kernel prompt (I guess you mean the kernel +line in the boot menue) and how to change it. So the small bar +prevents mischievous kids to do anything to dad's computer and office +collegues playing bad with you. + +What is the advantage to leave the barn door open? To make it easier +on those who can not remember their root password? Having to find out +how to overcome that small bar will not hurt them but teach them a +lesson. + +-- +wobo +</PRE> + + + + + + + + + + + + + + + + + + + + + + + + + + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="014877.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI>Next message: <A HREF="014880.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#14879">[ date ]</a> + <a href="thread.html#14879">[ thread ]</a> + <a href="subject.html#14879">[ subject ]</a> + <a href="author.html#14879">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://www.mageia.org/mailman/listinfo/mageia-dev">More information about the Mageia-dev +mailing list</a><br> +</body></html> |