Cype CMS SQL Injection: A Historical Exploit Deep Dive

What this paper is

This paper describes a SQL injection vulnerability found in Cype Content Management System (CMS). The author, Sora, published this exploit in January 2010. It details how an attacker could exploit a flaw in index.php to inject malicious SQL commands, potentially leading to unauthorized access or data manipulation.

Simple technical breakdown

The vulnerability lies in how the Cype CMS handles user input for the order parameter within its index.php script. When this parameter is not properly sanitized, an attacker can insert SQL code. The exploit uses a specific URL structure to trigger this injection. By appending a single quote (') to the order parameter, the attacker breaks the intended SQL query. Then, by adding further SQL syntax, they can manipulate the query's logic.

Complete code and payload walkthrough

The provided "Code/Proof of Concept (PoC)" is a URL string, not traditional executable code or shellcode.

• URL: http://server/index.php?cype=main&page=ranking&order='&job=500

Let's break down the components of this URL in the context of a potential SQL injection:

• http://server/index.php: This is the target script. It's the entry point for the web application.
• ?: This character separates the script path from the query parameters.
• cype=main: This is a parameter named cype with the value main. It likely controls a specific module or section of the CMS.
• &: This character separates different query parameters.
• page=ranking: This parameter named page has the value ranking. It probably indicates which page or content to load.
• order=': This is the critical parameter. The vulnerability is in how the order parameter is processed. By providing a single quote ('), the attacker is attempting to terminate the string literal that the order parameter is supposed to be part of within the backend SQL query.
• &job=500: This is another parameter named job with the value 500. Its role in the exploit is less direct but likely part of the original query structure that the injection is modifying.

Mapping:

• http://server/index.php?cype=main&page=ranking&order='&job=500 -> Exploitation URL structure

Explanation of the injection mechanism:

The exploit assumes that the index.php script constructs a SQL query that looks something like this (this is an inference, as the paper doesn't show the backend code):

SELECT ... FROM some_table WHERE page = 'ranking' ORDER BY some_column ' . $_GET['order'] . ' ...

When the order parameter is provided as ', the query becomes:

SELECT ... FROM some_table WHERE page = 'ranking' ORDER BY some_column '' ...

The single quote closes the some_column part, and the subsequent single quote is an unmatched quote. This often leads to a SQL syntax error. However, skilled attackers can leverage this to inject further SQL.

A more advanced injection might look like this:

order=' OR 1=1 --

This would transform the query into:

SELECT ... FROM some_table WHERE page = 'ranking' ORDER BY some_column '' OR 1=1 -- ' ...

• '': The first single quote closes the intended string, the second is an unmatched quote.
• OR 1=1: This condition is always true, effectively bypassing any filtering or ordering logic.
• -- : This is a SQL comment. It comments out the rest of the original query, preventing syntax errors from unmatched quotes or other clauses.

The paper itself only provides the initial trigger (order=') which, on its own, would likely cause an error. The true power of SQL injection comes from chaining this initial break with further malicious SQL commands to achieve a desired outcome (e.g., extracting data, logging in as an administrator). The paper doesn't detail these subsequent commands, only the initial point of injection.

Practical details for offensive operations teams

• Required Access Level: Network access to the target web server. No prior authentication is typically required for this type of vulnerability.
• Lab Preconditions:
  • A vulnerable Cype CMS installation. Since this is an older exploit, finding a live, unpatched instance might be challenging.
  • A web server environment (e.g., Apache, Nginx) running PHP.
  • A database server (e.g., MySQL) that the CMS connects to.
  • A tool to craft and send HTTP requests (e.g., curl, Burp Suite, OWASP ZAP).
  • A tool to automate SQL injection attempts and analyze results (e.g., sqlmap).
• Tooling Assumptions:
  • Standard web proxies for traffic interception and modification.
  • Automated SQL injection scanners are highly recommended for discovering the full extent of the vulnerability and crafting payloads.
• Execution Pitfalls:
  • WAF/IDS Evasion: Modern Web Application Firewalls (WAFs) and Intrusion Detection Systems (IDS) are likely to detect common SQL injection patterns. Payloads may need to be obfuscated or encoded.
  • Database Specific Syntax: The exact SQL syntax for exploitation (e.g., comments, union queries) can vary slightly between database systems (MySQL, PostgreSQL, SQL Server, etc.). The exploit assumes a common syntax, likely MySQL given the PHP context.
  • Application Logic: The effectiveness of the injection depends heavily on how the index.php script processes the order parameter and constructs the final SQL query. If the application has robust input validation or parameterized queries, this exploit would fail.
  • Error Handling: If the application suppresses SQL errors and returns generic error messages, it can be harder to confirm the injection and determine the database structure.
  • Payload Complexity: The provided PoC is a basic trigger. Crafting payloads to extract specific data or gain shell access requires significant understanding of SQL and the target database schema.

Where this was used and when

• Context: This exploit targets the Cype Content Management System, a web application. It would have been used against websites running this specific CMS.
• Timeframe: Published in January 2010. Exploitation would have occurred around this period and potentially for some time afterward until the vulnerability was patched or the CMS was updated. Given its age, it's unlikely to be a prevalent threat against actively maintained systems today.

Defensive lessons for modern teams

• Input Validation is Paramount: Always validate and sanitize all user-supplied input before it's used in database queries. This includes checking for special characters, length, and expected data types.
• Parameterized Queries (Prepared Statements): This is the most effective defense against SQL injection. By separating SQL code from data, the database engine treats input strictly as data, not executable commands.
• Least Privilege: Ensure the database user account used by the web application has only the minimum necessary privileges. This limits the damage an attacker can do even if they achieve SQL injection.
• Web Application Firewalls (WAFs): While not a silver bullet, WAFs can provide a layer of defense by detecting and blocking known malicious patterns. They should be used in conjunction with secure coding practices.
• Regular Patching and Updates: Keep all CMS and web application software up-to-date to patch known vulnerabilities.
• Error Message Suppression: Configure applications to not reveal detailed database error messages to end-users, as these can provide valuable information to attackers.

ASCII visual (if applicable)

This exploit is a web-based attack targeting a single script. A simple flow diagram can illustrate the request and potential injection point.

+-----------------+      +-----------------------+      +-----------------+
| Attacker's      |----->| Web Server            |----->| Cype CMS        |
| Browser/Tool    |      | (index.php)           |      | (index.php)     |
+-----------------+      +-----------------------+      +-----------------+
                           |                                   |
                           | HTTP Request                      | SQL Query
                           | (with injected parameter)         | (potentially malformed)
                           v                                   v
                     +-----------------+      +-----------------+
                     | Database Server |<-----| Application     |
                     | (SQL Execution) |      | Logic           |
                     +-----------------+      +-----------------+

Source references

• Exploit Title: Cype Content Management System Remote SQL Injection Exploit
• Date: January 1st, 2010
• Author: Sora
• Version: Revision 241
• Tested on: Linux (Backtrack 3)
• Paper URL: https://www.exploit-db.com/papers/10885

Original Exploit-DB Content (Verbatim)

# Exploit Title: Cype Content Management System Remote SQL Injection Exploit
# Date: January 1st, 2010
# Author: Sora
# Version: Revision 241
# Tested on: Linux (Backtrack 3)

-----------------------------------------

> Cype CMS Remote SQL Injection Exploit
> Author: Sora
> Contact: vhr95zw [at] hotmail [dot] com
> Website: http://greyhathackers.wordpress.com/
> Google Dork: In your dreams, script kiddies.

# Exploit Description:
Cype CMS suffers a remote SQL injection vulnerability in index.php.

# Code/Proof of Concept (PoC):
http://server/index.php?cype=main&page=ranking&order='&job=500