Now That's What I Call WordPress Security 2010

Brad Williams
Co-Founder of WebDevStudios.com
Organizer NJ WordPress Meetup
Co-Host SitePoint Podcast
Co-Author of Professional WordPress (http://bit.ly/pro-wp)
Who Am I?

The Goal of this Presentation…

…Is to scare the crap out of you!

…and then make everything better
with the best security tips!

 Example WordPress Hacks
 Securing Your WordPress Website
 How to Clean Up a Hacked Site
 Recommended Plugins
Topics

ExampleExample
WordPress
Hacker bot finds a security hole on your website

ExampleExample
Hacker bot hides a file in your WordPress installation
WordPress
Akismet.cache.php is NOT an Akismet file

ExampleExample
WordPress Hacker Bot
Hacker bot can now trigger this file/code remotely

ExampleExample
WordPress Hacker Bot
Common Hacker bot script jobs
• Add spam content and links to your websites theme files
• Create posts and pages with spam content and links
• Delete posts/pages/settings wreaking havoc on your site
• etc, etc, bad stuff, etc, etc

<b style=“display:none”>Any text you want to hide</b>
CSS Hides the SpamCSS Hides the Spam

Hidden Spam LinksHidden Spam Links

Only Noobs Get HackedOnly Noobs Get Hacked

FeaturedContentGallery.com: HACKED

Don’t use the admin account
UPDATE wp_users SET user_login='newuser' WHERE user_login='admin';
If you are using the admin account you are wrong!
Either change the username in MySQL:
Or create a new/unique account with administrator privileges.
1.Create a new account. Make the username very unique
2.Assign account to Administrator role
3.Log out and log back in with new account
4.Delete admin account
Make it hard on the hacker! If they already know your username that’s half the battle

Don’t use the admin account
WordPress 3.0 lets you set
the administrator username
during the installation
process!

The Great Permission Debate
What folder permissions should you use?
Good Rule of Thumb:
• Files should be set to 644
• Folders should be set to 755
Start with the default settings above
if you can’t upload increase privileges (ie 775, 777)
Permission levels vary depending on server configuration

The Great Permission Debate
Permissions can be set via FTP
find [your path here] -type d -exec chmod 755 {} ;
find [your path here] -type f -exec chmod 644 {} ;
Or via SSH with the following commands

Move the wp-config.php file
WordPress 2.6 added the ability to move the wp-config.php
file one directory above your WordPress root
This makes it nearly impossible for anyone to access your wp-config.php
file as it now resides outside of your website’s root directory
You can move your wp-config.php file to here
WordPress automatically checks the parent directory if a
wp-config.php file is not found in your root directory
public_html/wordpress/wp-config.php
If WordPress is located here:
public_html/wp-config.php

Move the wp-content Directory
WordPress 2.6 added the ability to move the wp-content directory
1. Move your wp-content directory
2. Make two additions to wp-config.php
define( 'WP_CONTENT_DIR', $_SERVER['DOCUMENT_ROOT'] . '/blog/wp-content' );
define( 'WP_CONTENT_URL', 'http://domain.com/blog/wp-content');
define( 'WP_PLUGIN_DIR', $_SERVER['DOCUMENT_ROOT'] . '/blog/wp-content/plugins' );
define( 'WP_PLUGIN_URL', 'http://domain.com/blog/wp-content/plugins');
If you have compatibility issues with plugins there are two optional settings
If hackers can’t find your wp-content folder, they can’t hack it!

Remove WordPress Version from Header
Viewing source on most WP sites will reveal the version they are running
This helps hackers find vulnerable WP blogs running older versions
<meta name="generator" content="WordPress 2.9.2" /> 
To remove find the code below in your header.php file of your theme and remove it
<meta name="generator" content="WordPress <?php bloginfo('version'); ?>" />

Themes and plugins might also display
versions in your header.
The wp_head function also includes the WP version in your header
To remove drop this line of code in your themes functions.php file
remove_action('wp_head', 'wp_generator');

Stay Current on Updates
Keep WordPress core, plugins, and theme files up to date
The plugin Changelog tab
makes it very easy to view
what has changed in a new
plugin version
Recent WordPress hack only affected outdated WordPress installs

Use Secure Passwords
Use strong passwords to protect your website from dictionary attacks
Not just for WordPress, but also FTP, MySQL, etc
BAD PASSWORD: bradrocks
Great resource:
toughpassword.com
Creates random passwords
GOOD PASSWORD: S-gnop2D[6@8
WordPress will tell you
when you have it right

Use Secret Keys
define('AUTH_KEY', 'put your unique phrase here');
define('SECURE_AUTH_KEY', 'put your unique phrase here');
define('LOGGED_IN_KEY', 'put your unique phrase here');
define('NONCE_KEY', 'put your unique phrase here');
define('AUTH_SALT', 'put your unique phrase here');
define('SECURE_AUTH_SALT', 'put your unique phrase here');
define('LOGGED_IN_SALT', 'put your unique phrase here');
define('NONCE_SALT', 'put your unique phrase here');
1. Edit wp-config.php
A secret key is a hashing salt which makes your site harder to
hack by adding random elements to the password.
2. Visit this URL to get your secret keys: https://api.wordpress.org/secret-key/1.1/salt
BEFORE
define('AUTH_KEY', '*8`:Balq!`,-j.JTl~sP%&>@ON,t(}S6)IG|nG1JIfY(,y=][-3$!N6be]-af|BD');
define('SECURE_AUTH_KEY', 'q+i-|3S~d?];6$[$!ZOXbw6c]0 !k/,UxOod>fqV!sWCkvBihF2#hI=CDt_}WaH1');
define('LOGGED_IN_KEY', 'D/QoRf{=&OC=CrT/^Zq}M9MPT&49^O}G+m2L{ItpX_jh(-I&-?pkeC_SaF0nw;m+');
define('NONCE_KEY', 'oJo8C&sc+ C7Yc,W1v o5}.FR,Zk!J<]vaCa%2D9nj8otj5z8UnJ_q.Q!hgpQ*-H');
define('AUTH_SALT', 'r>O/;U|xg~I5v.u(Nq+JMfYHk.*[p8!baAsb1DKa8.0}q/@V5snU1hV2eR!|whmt');
define('SECURE_AUTH_SALT', '3s1|cIj d7y<?]Z1n# i1^FQ *L(Kax)Y%r(mp[DUX.1a3!jv(;P_H6Q7|y.!7|-');
define('LOGGED_IN_SALT', '`@>+QdZhD!|AKk09*mr~-F]/F39Sxjl31FX8uw+wxUYI;U{NWx|y|+bKJ*4`uF`*');
define('NONCE_SALT', 'O+#iqcPw#]O4TcC%Kz_DAf:mK!Zy@Zt*Kmm^C25U|T!|?ldOf/l1TZ6Tw$9y[M/6');
AFTER
You can add/change secret keys at anytime.
This will invalidate all existing cookies and require your users to login again

Change WordPress Table Prefix
/**
* WordPress Database Table prefix.
*
* You can have multiple installations in one database if you give each a unique
* prefix. Only numbers, letters, and underscores please!
*/
$table_prefix = ‘drupal_';
1. Edit wp-config.php before installing WordPress
All database tables will now have a unique prefix (ie drupal_posts)
2. Change the prefix wp_ to something unique:

Force SSL Login and Admin Access
define('FORCE_SSL_LOGIN', true);
Set the below option in wp-config.php to force SSL (https) on login
Set the below option in wp-config.php to force SSL (https) on all admin pages
define('FORCE_SSL_ADMIN', true);

.htaccess lockdown
AuthUserFile /dev/null
AuthGroupFile /dev/null
AuthName "Access Control"
AuthType Basic
order deny,allow
deny from all
#IP address to Whitelist
allow from 67.123.83.59
allow from 123.123.123.123
1. Create a .htaccess file in your wp-admin directory
Only a user with the IP 67.123.83.59 or 123.123.123.123 can access wp-admin
2. Add the following lines of code:

Step 1: Delete Everything and Start Over!

Step 1: Do a Fresh Install of WordPress
• Delete, don’t overwrite, all original WordPress files
• Upload fresh copies of all WordPress core files
Be sure to backup your theme, plugins, media, etc

Step 2: Re-install All Plugins
• Install fresh copies of all WP plugins need
• DON’T use the same plugin files from the hacked site

Step 3: Re-install Your Theme
• If possible install a fresh copy of your theme
• If using the old theme be sure to inspect every file for hack code

Step 4: Change all Passwords and Keys
• Change your passwords: WordPress, FTP, MySQL
• Verify the hacker didn’t create another user, if so delete it
• Update your secret keys in wp-config.php (as shown earlier)

Step 5: Scan Database for Malicious Code
• Look for common hack keywords:
• eval, base64, strrev, iframe, noscript, display
• Use WordPress Exploit Scanner plugin (discussed later)
Example SQL: SELECT * FROM wp_posts WHERE post_content LIKE '%eval%'

Step 6: Verify folder/file permissions
• Check all folder and file permissions are correct
• Reset to 755 on folders and 644 on files if needed

WP Security Scan
http://wordpress.org/extend/plugins/wp-security-scan/

WP-MalWatch
http://wordpress.org/extend/plugins/wp-malwatch/
• Nightly security scan
• Detects files based on
configurable file patterns
• Detects hidden files
•

ServerBuddy
http://wordpress.org/extend/plugins/serverbuddy-by-pluginbuddy/

WordPress Exploit Scanner
http://wordpress.org/extend/plugins/exploit-scanner/

WordPress File Monitor
http://wordpress.org/extend/plugins/wordpress-file-monitor/

Login Lockdown
http://wordpress.org/extend/plugins/login-lockdown/

 Security Related Codex Articles
› http://codex.wordpress.org/Hardening_WordPress
› http://codex.wordpress.org/Changing_File_Permissions
› http://codex.wordpress.org/Editing_wp-config.php
› http://codex.wordpress.org/htaccess_for_subdirectories
 Blog Security Articles
› http://www.wpbeginner.com/wp-tutorials/11-vital-tips-and-hacks-to-protect-your-wordpress-
admin-area/
› http://www.growmap.com/wordpress-exploits/
› http://lorelle.wordpress.com/2009/03/07/firewalling-and-hack-proofing-your-wordpress-
blog/
› http://semlabs.co.uk/journal/how-to-stop-your-wordpress-blog-getting-hacked/
› http://www.makeuseof.com/tag/18-useful-plugins-and-hacks-to-protect-your-wordpress-
blog/
› http://www.catswhocode.com/blog/10-easy-ways-to-secure-your-wordpress-blog
 Clean A Hacked Site
› http://codex.wordpress.org/FAQ_My_site_was_hacked
› http://ottodestruct.com/blog/2009/hacked-wordpress-backdoors/
› http://ocaoimh.ie/did-your-wordpress-site-get-hacked/
› http://smackdown.blogsblogsblogs.com/2008/06/24/how-to-completely-clean-your-hacked-
wordpress-installation/
› http://blog.sucuri.net/2010/02/removing-malware-from-wordpress-blog.html
WordPress Security Resources

Brad Williams
brad@webdevstudios.com
Blog: strangework.com
Twitter: @williamsba
IRC: WDS-Brad
http://www.slideshare.net/williamsba
Contact

Tweet: @williamsba WordPress Security Rocks! #wcchicago
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Now That's What I Call WordPress Security 2010

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