Bug 222208 - Installation not using shadow passwords by default
Installation not using shadow passwords by default
Product: Fedora
Classification: Fedora
Component: shadow-utils (Show other bugs)
x86_64 Linux
medium Severity medium
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Assigned To: Peter Vrabec
David Lawrence
Depends On:
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Reported: 2007-01-10 16:40 EST by Robert Banfield
Modified: 2007-11-30 17:11 EST (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2007-01-12 06:54:53 EST
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Description Robert Banfield 2007-01-10 16:40:02 EST
Description of problem:
In the Xen context, I have created images for virtualization using yum to
groupinstall base, etc.  Upon instantiation, shadow passwords are not used. 
pwconv must be used to convert to shadow passwords

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.yum --installroot=/mnt/fc6image groupinstall base (and others)
2.chroot /mnt/fc6image /usr/sbin/useradd abc -p blah_encrypted_blah_blah
3./mnt/fc6image/etc/shadow does not exist
Actual results:
Shadow does not exist, password in passwd

Expected results:
passwd contains :x: and shadow contains the password

Additional info:
Fix is to use pwconv.  For this unsuspecting (like me before I found out), this
can be a flaw waiting to be exploited.
Comment 1 Peter Vrabec 2007-01-11 11:55:17 EST
shadow-utils doesn't use /etc/shadow, because it doesn't exit.

# rpm -qf /etc/shadow

Phil, do you know something about this?
Comment 2 Phil Knirsch 2007-01-12 06:50:35 EST
Installing a guest using yum will by default use the most basic and default
configuration for it (resp. it will be completely unconfigured). And an
unconfigured system will by default not use /etc/shadow. So this is expected and
intended behaviour.

Using a proper installer (like anaconda) to setup up guest or by running
firstboot after doing it with yum will result in a proper set up guest.

Read ya, Phil

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