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diff --git a/zarb-ml/mageia-dev/2012-April/014877.html b/zarb-ml/mageia-dev/2012-April/014877.html new file mode 100644 index 000000000..eabd89664 --- /dev/null +++ b/zarb-ml/mageia-dev/2012-April/014877.html @@ -0,0 +1,152 @@ +<!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=%3C4F993516.9060501%40colin.guthr.ie%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="014875.html"> + <LINK REL="Next" HREF="014879.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[Mageia-dev] Handling single user/rescue/failsafe mode</H1> + <B>Colin Guthrie</B> + <A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Handling%20single%20user/rescue/failsafe%20mode&In-Reply-To=%3C4F993516.9060501%40colin.guthr.ie%3E" + TITLE="[Mageia-dev] Handling single user/rescue/failsafe mode">mageia at colin.guthr.ie + </A><BR> + <I>Thu Apr 26 13:44:22 CEST 2012</I> + <P><UL> + <LI>Previous message: <A HREF="014875.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI>Next message: <A HREF="014879.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#14877">[ date ]</a> + <a href="thread.html#14877">[ thread ]</a> + <a href="subject.html#14877">[ subject ]</a> + <a href="author.html#14877">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>'Twas brillig, and Wolfgang Bornath at 26/04/12 12:05 did gyre and gimble: +><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> +Yes, but inittab itself just referenced /bin/sh (thus not caring what +SINGLE variable was set to). + +><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> +As Guillaume pointed out, if they have physical access, you can also +just pass init=/bin/sh to the kernel prompt, so I see little real +security benefit here (it maybe raises the bar slightly, but insecure is +insecure). + +Col + + + +-- + +Colin Guthrie +colin(at)mageia.org +<A HREF="http://colin.guthr.ie/">http://colin.guthr.ie/</A> + +Day Job: + Tribalogic Limited <A HREF="http://www.tribalogic.net/">http://www.tribalogic.net/</A> +Open Source: + Mageia Contributor <A HREF="http://www.mageia.org/">http://www.mageia.org/</A> + PulseAudio Hacker <A HREF="http://www.pulseaudio.org/">http://www.pulseaudio.org/</A> + Trac Hacker <A HREF="http://trac.edgewall.org/">http://trac.edgewall.org/</A> +</PRE> + + + + + + + + + + + + + + + + + + + + + + + + + + + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="014875.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI>Next message: <A HREF="014879.html">[Mageia-dev] Handling single user/rescue/failsafe mode +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#14877">[ date ]</a> + <a href="thread.html#14877">[ thread ]</a> + <a href="subject.html#14877">[ subject ]</a> + <a href="author.html#14877">[ 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> |