I will follow up with #763013, it's an obvious duplicate. I had an unusable system after removing bash because of dhclient. Although there is probably some other case where dhclient-script does not work correctly, using /bin/sh instead got me an operational desktop system.
I find the risk of breakage over scripts that require /bin/bash is far easier to manage than the risk of a new 0-day remote bash exploit worm. On Sat, Sep 27, 2014 at 07:21:06AM +0000, Debian Bug Tracking System wrote: > This is an automatic notification regarding your Bug report > which was filed against the isc-dhcp-client package: > > #763013: isc-dhcp-client depends on /bin/bash, not /bin/sh > > It has been closed by Thijs Kinkhorst <th...@debian.org>. > > Their explanation is attached below along with your original report. > If this explanation is unsatisfactory and you have not received a > better one in a separate message then please contact Thijs Kinkhorst > <th...@debian.org> by > replying to this email. > > > -- > 763013: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=763013 > Debian Bug Tracking System > Contact ow...@bugs.debian.org with problems > Date: Sat, 27 Sep 2014 09:17:47 +0200 > From: Thijs Kinkhorst <th...@debian.org> > To: 763013-d...@bugs.debian.org > Subject: Re: isc-dhcp-client depends on /bin/bash, not /bin/sh > X-Spam-Status: No, score=-6.0 required=4.0 tests=BAYES_00,FROMDEVELOPER, > MURPHY_DRUGS_REL8,RCVD_IN_DNSWL_NONE autolearn=ham > version=3.3.2-bugs.debian.org_2005_01_02 > > Hi Troy, > > > Severity: critical > > Tags: patch > > Justification: breaks the whole system > > > Remove dependency on bash. Fixes ifup/ifdown with dhcp on unbashed-system. > > This is not a critical bug since using bash does not 'break the whole system'. > > The patch is also not correct because this script is marked /bin/bash for a > reason, because it's not fully posix compliant and therefore will not run > with > just any /bin/sh. > > It's a valid request for the script to be modified to change its interpreter, > it's already filed at #762923. Maybe you can help develop a tested patch for > that to move it forward. > > > Cheers, > Thijs > Date: Sat, 27 Sep 2014 00:23:56 -0500 > From: Troy Benjegerdes <troy-debb...@7el.us> > To: Debian Bug Tracking System <sub...@bugs.debian.org> > Subject: isc-dhcp-client depends on /bin/bash, not /bin/sh > X-Spam-Status: No, score=-10.6 required=4.0 > tests=BAYES_00,FOURLA,HAS_PACKAGE, > MURPHY_DRUGS_REL8,RCVD_IN_PBL,RCVD_IN_SORBS_DUL,RDNS_DYNAMIC, > XMAILER_REPORTBUG,X_DEBBUGS_CC autolearn=ham > version=3.3.2-bugs.debian.org_2005_01_02 > X-Mailer: reportbug 6.4.4 > > Package: isc-dhcp-client > Version: 4.2.2.dfsg.1-5+deb70u6 > Severity: critical > Tags: patch > Justification: breaks the whole system > > Remove dependency on bash. Fixes ifup/ifdown with dhcp on unbashed-system. > > Also see bug 763012 > > --- dhclient-script.bad 2014-09-27 00:21:48.377145358 -0500 > +++ /sbin/dhclient-script 2014-09-27 00:15:31.508982652 -0500 > @@ -1,4 +1,4 @@ > -#!/bin/bash > +#!/bin/sh > > # dhclient-script for Linux. Dan Halbert, March, 1997. > # Updated for Linux 2.[12] by Brian J. Murrell, January 1999. > > > -- System Information: > Debian Release: 7.6 > APT prefers stable-updates > APT policy: (500, 'stable-updates'), (500, 'stable') > Architecture: amd64 (x86_64) > > Kernel: Linux 3.2.0-4-amd64 (SMP w/2 CPU cores) > Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/dash > > Versions of packages isc-dhcp-client depends on: > ii debianutils 4.3.2 > ii iproute 20120521-3+b3 > ii isc-dhcp-common 4.2.2.dfsg.1-5+deb70u6 > ii libc6 2.13-38+deb7u4 > > isc-dhcp-client recommends no packages. > > Versions of packages isc-dhcp-client suggests: > ii avahi-autoipd 0.6.31-2 > pn resolvconf <none> > > -- no debconf information -- ---------------------------------------------------------------------------- Troy Benjegerdes t...@7el.us 7 elements earth::water::air::fire::mind::spirit::soul grid.coop Never pick a fight with someone who buys ink by the barrel, nor try buy a hacker who makes money by the megahash -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
