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released Aug 28th 2018
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geoffwilliams/system_users — version 0.5.5 Aug 28th 2018
system_users
Table of Contents
- Description
- Usage - Configuration options and additional functionality
- Limitations - OS compatibility, etc.
- Development - Guide for contributing to the module
Description
This module provides various classes for locking down local users on a system in order to set password policies, remove invalid users, etc. The other main feature of the module is to provide a fact called user_audit that includes information about all local users, any suspicious files they possess and details of users breaking various aspects of the login system integrity such as duplicated or mismatched UIDs or GIDs.
The user_audit fact is structured as follows:
"user_audit": {
"empty_password": [], // array of users who have empty passwords
"low_uids": [], // array of 'low uid' users (UID < 500)
"system_uids": [], // array of 'system' users (UID < 1000)
"homedirs": { // home directory information for each user (only one shown for clarity)
"root": {
"path": "/root",
"ensure": "directory",
"owner": "root",
"group": "root",
"mode": "0550",
"og_write": [] // array of other/group writable dotfiles in the top level directory
},
},
"local_users": { // user ID information for all local users (only one shown for clarity, password info on RHEL/Solaris only)
"root": {
"uid": "0",
"gid": "0",
"comment": "root",
"home": "/root",
"shell": "/bin/bash",
"last_change_days": "17207",
"change_allowed_days": "0",
"must_change_days": "99999",
"warning_days": "7",
"expires_days": "",
"disabled_days": ""
},
},
"duplicate": {
"uid": [], // array of duplicated UIDs
"username": [], // array of duplicated usernames
"gid": [], // array of duplicated GIDs
"groupname": [], // array of duplicated groupnames
"root_alias": [] // array of duplicated root users (UID==0)
}
},
Usage
Most classes will need to be loaded using the class resource syntax in order to pass the appropriate class defaults, eg:
class { "foo:bar":
param1 => "value1",
param2 => "value2",
}
Parameters, where available, are documented inside the individual classes. See Reference section.
Limitations
- AIX 6.1/7.1, RHEL 6/7, Solaris 10 only
- Not supported by Puppet, Inc.
Development
PRs accepted :)
Testing
This module supports testing using PDQTest.
Test can be executed with:
bundle install
bundle exec pdqtest all
See .travis.yml for a working CI example
Reference
Table of Contents
Classes
system_users::delete_nis: Delete legacy NIS users from this systemsystem_users::delete_root_alias: Remove all aliases of the root accountsystem_users::disable_system_account: Lock the password and shell of system/low uid userssystem_users::homedir: Ensure user homedirs set to correctmodesystem_users::lock_empty_password: Lock all user accounts with empty passwordssystem_users::lock_inactive: Lock users who have been inactive for a certain periodsystem_users::root: Ensure root user and its homedir are setup correctlysystem_users::root_group: Set the group for therootuser to be GID 0
Resource types
system_users_disable_overrides: Disable the files .netrc, .forward, .rhosts and .shosts by changing the owner to root and the permissions to 000
Classes
system_users::delete_nis
Delete legacy NIS users from this system (lines starting + in /etc/group, /etc/gshadow, /etc/passwd and
/etc/shadow).
Examples
Remove all + entries
include system_users::delete_nis
system_users::delete_root_alias
Remove all aliases of the root account (UID == 0 and username != root). These are
identified by the user_audit fact
system_users::disable_system_account
Lock the password and shell of:
System users
system_uids- uid < 1000
Low uids
low_uids- uid < 500
For system accounts present on this node excluding:
- root
- sync (password lock only)
- shutdown (password lock only)
- halt (password lock only)
You can exclude particular usernames from the above requirement with the exempt_users
parameter. This should be used if you want to leave particular users alone. The action
of locking the password and shell is guarded to try to avoid clashes with other catalog
resources. For this to work, you need to evaluate this class after any other user
resources that should take precidence.
The data on users in the UID range is sourced from the user_audit fact which ships inside this module. The fact
itself excludes the root user.
Parameters
The following parameters are available in the system_users::disable_system_account class.
uid_range
Data type: Enum['low_uids', 'system_uids']
Range of UIDs to lockdown (see above)
Default value: 'system_uids'
exempt_users
Data type: Array[String]
Additional usernames to exempt
Default value: []
system_users::homedir
The user_audit fact contains a list of all homedirs for users local to this system. We
use this information to enforce the desired mode on these directories, excluding the root
user and other system home directories (see code for details).
- Note The
modeparameter must be set for any changes to happen.
Parameters
The following parameters are available in the system_users::homedir class.
mode
Data type: Optional[String]
Mode to set home directories to, eg 0700
Default value: undef
system_users::lock_empty_password
The user_audit fact contains a list of users with empty passwords, we use this to
determine if any accounts need locking
Parameters
The following parameters are available in the system_users::lock_empty_password class.
lock_method
Data type: Any
string to insert into password field to lock the account
Default value: '*'
system_users::lock_inactive
Lock users who have been inactive for a certain period:
Solaris
- set
definactin/usr/sadm/defadduser useradd -D
RHEL
- set
INACTIVE=in/etc/default/useradd
Parameters
The following parameters are available in the system_users::lock_inactive class.
period
Data type: Integer
How long to wait before locking a user (days)
Default value: 30
system_users::root
Features:
- Manage the
rootuser and its homedir - Manage permissions on
/rootand ensure it exists
system_users::root_group
Manage the gid of the root user and nothing else
- Note incompatible with
system_users::root
Resource types
system_users_disable_overrides
Disable the files .netrc, .forward, .rhosts and .shosts by changing the owner to root and the permissions to 000
Properties
The following properties are available in the system_users_disable_overrides type.
ensure
Valid values: overrides_disabled
not used
Parameters
The following parameters are available in the system_users_disable_overrides type.
ensure
namevar
arbitrary sting
Types in this module release
Dependencies
- puppetlabs-stdlib (>= 4.14.0)
- geoffwilliams-filemagic (0.6.1)
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