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Displaying posts with tag: authentication (reset)
Building a better CREATE USER command

Prior to MySQL 5.7, the CREATE USER command had a number of limitations:

  • No way to set both authentication plugin and password
  • No way to disable a user
  • No way to define user resource limitations
  • No way to set a non-default password expiration policy
  • No way to require SSL/x509

All of these things could be done through other means, but typically involved other statements, such as GRANT commands.  Starting with MySQL 5.7.6, these can all be done through a new and improved CREATE USER syntax:

Passwords and authentication plugin

The most important aspect to me, from a security perspective, is the ability to now create user accounts with non-default authentication plugins (like sha256_password) and a non-blank password:

mysql> CREATE USER new@localhost
-> IDENTIFIED WITH sha256_password …

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Stop using FLUSH PRIVILEGES

Mermaids have the same probability of fixing your permission problems, but people continue believing in the FLUSH PRIVILEGES myth.I see suggesting the usage of FLUSH PRIVILEGES every time someone writes a tutorial or a solution to a problem regarding creating a new account or providing different privileges. For example, the top post on /r/mysql as of the writing of these lines, “MySQL:The user specified as a definer does not exist (error 1449)-Solutions” has multiple guilty cases of this (Update: the user has corrected those lines after I posted this article).

It is not my intention to bash that post, but I have seen …

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Setting up authentication en masse

Managing many hosts is quite challenging task. There are many tools to solve the problem. My favorite is pdsh.

Running a command across a set of hosts is as simple as following:

# pdsh -w 192.168.177.[201-208] -R ssh reboot

Together with dshbak (which is a part of pdsh package) you can do even cooler things. Like, check which systems have yum:

# pdsh -w 192.168.177.[201-208] -R ssh "which yum" | dshbak -c
----------------
192.168.177.[201-203]
----------------
/usr/bin/yum 

Or which systems run older version of MySQL

# pdsh -w 192.168.177.[201-208] -R ssh "mysql -e \"SHOW VARIABLES LIKE 'version'\""  | dshbak -c
----------------
192.168.177.[201-203]
----------------
Variable_name   Value
version 5.6.19
----------------
192.168.177.[204-208]
----------------
Variable_name   Value
version 5.5.38

To make pdsh …

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MySQL 5.6 Experiences - .mylogin.cnf and mysql_config_editor

Having  basic ideas of how I am going to describe new features explained, I can proceed with some real (and I hope useful) content. As I read this page about new features from top to bottom, let's start with security improvements...

.mylogin.cnf and mysql_config_editor  Details:

  • you can store authentication credentials encrypted in an option file named .mylogin.cnf (in user's home directory or in %APPDATA%\MySQL on Windows)
  • password is no longer stored in plain text (like in .my.cnf) and still is not exposed in the command lines...
  • you have to use mysql_config_editor utility to create the .mylogin.cnf file
  • but if …
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Speaking at MySQL Connect 2012

At the end of September, the MySQL Connect 2012 conference will be held as part of Oracle OpenWorld in San Francisco. MySQL Connect is a two day event that allows attendees to focus on MySQL at a technical depth with presentations and interaction with many of the MySQL developers, engineers and other knowledgeable staff. There is also a range a international speakers to give broader knowledge to the presentations.

I am presenting a Hands-On Lab on Sunday 30th September 16:15 - 17:15 entitled HOL10474 - MySQL Security: Authentication and Auditing. The sessions goes through an introduction to the plugin API and how it can help expand the capabilities of MySQL. Since it is a hands-on lab, …

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MySQL PAM/LDAP authentication module configuration

MySQL Enterprise 5.5 (trial version available here) includes MySQL PAM authentication plugin. In this post I will show how to configure it with the OpenLDAP and Active Directory.

MySQL PAM authentication uses Linux pam_ldap library to send the calls. To configure MySQL LDAP authentication we will need to configure pam_ldap on linux.

OpenLDAP Linux configuration

  • Make sure that libpam-ldap/openldap is installed. If not, on RedHat/CentOS use commands:

# yum install openldap openldap-clients

  • Configure /etc/ldap.conf. Sample configuration:

debug 10 # set debug level only during the initial configuration
base dc=corp,dc=company_name,dc=com
binddn cn=service_account,OU=Service Accounts,OU=US Security,DC=corp,DC=company_name,DC=com
bindpw <password>
timelimit 120 …

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Windows Native Authentication for MySQL

Starting with MySQL 5.5.16 it is possible to setup a password-less connections from clients into MySQL server using Windows SSPI authentication framework. This functionality is provided by Windows Native Authentication (WNA) plugin distributed with the commercial version of 5.5.16 server. The client-side support for WNA authentication is built into the client library (libmysql) distributed with the community version of 5.5.16 server and requires no additional configuration. Clients which link to 5.5.16 or higher version of libmysql will be able to connect to MySQL accounts using WNA authentication out-of-the box.

For password-less connections to work, server's administrator must install the WNA plugin in the server and create user accounts which use this plugin for authentication. It is also possible to allow connections to existing MySQL accounts via a proxy WNA account. With this setup Windows clients can password-less connect to the …

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Windows Native Authentication for MySQL

Starting with MySQL 5.5.16 it is possible to setup a password-less connections from clients into MySQL server using Windows SSPI authentication framework. This functionality is provided by Windows Native Authentication (WNA) plugin distributed with the commercial version of 5.5.16 server. The client-side support for WNA authentication is built into the client library (libmysql) distributed with the community version of 5.5.16 server and requires no additional configuration. Clients which link to 5.5.16 or higher version of libmysql will be able to connect to MySQL accounts using WNA authentication out-of-the box.

For password-less connections to work, server's administrator must install the WNA plugin in the server and create user accounts which use this plugin for authentication. It is also possible to allow connections to existing MySQL accounts via a proxy WNA account. With this setup Windows clients can password-less connect to the …

[Read more]
Centralized Login Management Comes to MySQL: Introducing PAM and Windows Authentication Support

You probably remember the world of new possibilities introduced to MySQL 5.5. If you do, you probably would agree that no API is useful by itself.

This is why you need authentication plugins that fit the largest possible number of authentication setups.

I can only guess what these authentication solutions look like for your server. But chances are that your OS has a pretty good idea on how best to authenticate users in it. This is why we've decided to hook MySQL to the two most widely used OS authentication APIs : Pluggable Authentication Modules (a.k.a PAM) and the Windows Security Support Provider Interface

Let's …

[Read more]
Centralized Login Management Comes to MySQL: Introducing PAM and Windows Authentication Support

You probably remember the world of new possibilities introduced to MySQL 5.5. If you do, you probably would agree that no API is useful by itself.

This is why you need authentication plugins that fit the largest possible number of authentication setups.

I can only guess what these authentication solutions look like for your server. But chances are that your OS has a pretty good idea on how best to authenticate users in it. This is why we've decided to hook MySQL to the two most widely used OS authentication APIs : Pluggable Authentication Modules (a.k.a PAM) and the Windows Security Support Provider Interface

Let's …

[Read more]
Showing entries 11 to 20 of 48
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