Understanding the SoftBizScripts Hosting Script SQL Injection Exploit

What this paper is

This paper describes a SQL injection vulnerability found in the SoftBizScripts Hosting Script. The vulnerability allows an attacker to manipulate database queries by injecting malicious SQL code through a specific URL parameter. This can lead to unauthorized access to sensitive data or even modification of the database.

Simple technical breakdown

The core of the vulnerability lies in how the web application handles user input from the cid parameter in the browsecats.php script. Instead of properly sanitizing or validating this input, the application directly incorporates it into a SQL query.

By appending specific SQL commands (like UNION SELECT) and characters (like ' and --), an attacker can trick the database into executing unintended queries. The example provided shows how to extract the database version, which is a common first step in understanding the database environment.

Complete code and payload walkthrough

The provided "code" is not a full script but rather an example of an exploited URL and a demonstration of the attack vector.

• Exploited Link: http://[site]m/browsecats.php?cid=2'

  • Purpose: This is the initial target URL. The [site] placeholder represents the vulnerable web server. The browsecats.php script is the vulnerable file. The cid=2' part is crucial. The ' (single quote) is appended to the expected numeric cid value (likely 2). This single quote is intended to break out of the original SQL query's string context, allowing for further SQL commands to be appended.

• Example Payload: http://[site]/browsecats.php?cid=2+union+select+1,version(),3,4--

  • Purpose: This is the actual exploit payload. Let's break it down:
    • http://[site]/browsecats.php?cid=2: This is the base URL with the vulnerable parameter.
    • +: In URLs, + often represents a space.
    • union: This is a SQL keyword used to combine the results of two or more SELECT statements. It's used here to inject our own query into the application's original query.
    • select: This is the standard SQL command to retrieve data.
    • 1,version(),3,4: This is the core of the injected SELECT statement.
      • 1, 3, 4: These are placeholder values. The UNION SELECT statement must return the same number of columns as the original SELECT statement it's combined with. These numbers represent columns that are likely present in the original query but not of interest for this specific exploit.
      • version(): This is a SQL function that returns the version of the database server. By including this, the attacker aims to display the database version on the web page, confirming the injection is successful and providing information about the target database.
    • --: This is a SQL comment indicator. In many SQL dialects, -- followed by a space (or just -- depending on the specific SQL server) comments out the rest of the original SQL query. This prevents any syntax errors that might arise from the original query's remaining parts after our injected UNION SELECT.

Mapping list:

• browsecats.php?cid=2': Attempts to break out of the original SQL query context.
• union select: Injects a new query to combine results.
• version(): Retrieves database version information.
• --: Comments out the remainder of the original SQL query.

Practical details for offensive operations teams

• Required Access Level: No elevated access is required beyond being able to send HTTP requests to the target web server. This is a client-side attack vector.
• Lab Preconditions:
  • A target web server running the vulnerable SoftBizScripts Hosting Script.
  • The web server must be accessible over the network.
  • A local environment to craft and send HTTP requests.
• Tooling Assumptions:
  • A web browser for initial reconnaissance and manual testing.
  • A command-line HTTP client like curl or wget for scripting and automation.
  • A proxy tool like Burp Suite or OWASP ZAP for intercepting and modifying requests.
  • SQL injection specific tools (e.g., sqlmap) could automate finding and exploiting this, but manual understanding is key.
• Execution Pitfalls:
  • Incorrect cid value: If the cid parameter is not an integer or if the application uses a different parameter for this functionality, the exploit might fail.
  • Database type differences: The version() function might vary slightly or not be available on all database systems. Similarly, the -- comment syntax might need adjustment for specific SQL dialects (e.g., # for MySQL in some contexts).
  • WAF/IPS: A Web Application Firewall or Intrusion Prevention System could detect and block the malicious SQL syntax.
  • Application logic: The output of the UNION SELECT might not be displayed directly on the page, or it might be filtered. The attacker would need to find a way to exfiltrate the data.
  • Number of columns: The UNION SELECT statement must match the number of columns in the original query. If the original query selects 5 columns, UNION SELECT 1,version(),3,4 would fail. The attacker would need to perform column discovery first.
• Tradecraft Considerations:
  • Reconnaissance: Use search engine dorks (like inurl:"browsecats.php?cid=") to find potential targets.
  • Enumeration: Start with simple probes like ?cid=2' to see if the application throws an error or behaves differently. Then, try ?cid=2' OR '1'='1 to see if it returns all records.
  • Data Exfiltration: Once the vulnerability is confirmed, the attacker would move to extracting specific data, potentially using UNION SELECT with other functions or by joining with other tables.
  • Anonymity: Use proxies, VPNs, or Tor to mask the origin of the requests.

Where this was used and when

• Context: This exploit targets a specific web application script, "SoftBizScripts Hosting Script," which is likely used by web hosting providers or individuals to manage hosting accounts or categories.
• Approximate Year/Date: The paper was published on April 28, 2010. This indicates the vulnerability was likely discovered and weaponized around that time. Exploits of this nature were common in the late 2000s and early 2010s as web application security practices were less mature.

Defensive lessons for modern teams

• Input Validation and Sanitization: This is the most critical defense. Never trust user input.
  • Parameterized Queries/Prepared Statements: Use these exclusively for database interactions. They separate SQL code from data, preventing injection.
  • Whitelisting: If possible, only allow known-good characters or formats for input.
  • Blacklisting (less effective): Avoid relying solely on blacklisting potentially malicious characters, as attackers can often find bypasses.
• Web Application Firewalls (WAFs): Deploy and properly configure WAFs to detect and block common attack patterns, including SQL injection attempts. Keep WAF rules updated.
• Least Privilege: Ensure the web application's database user has only the minimum necessary permissions. This limits the damage an attacker can do even if they achieve some level of database access.
• Regular Patching and Updates: Keep all web applications, frameworks, and server software up-to-date to patch known vulnerabilities.
• Security Audits and Code Reviews: Regularly review application code for security flaws.
• Error Handling: Configure applications to log errors securely but avoid displaying detailed error messages (like SQL errors) to end-users, as these can provide valuable information to attackers.

ASCII visual (if applicable)

This exploit is a direct interaction with a web server and its backend database. An ASCII visual can represent the flow of data.

+-----------------+      +-----------------+      +-----------------+
| Attacker's      |----->| Web Server      |----->| Database Server |
| Machine         |      | (Vulnerable App)|      |                 |
+-----------------+      +-----------------+      +-----------------+
      |                                                   ^
      | HTTP Request (with injected SQL)                  | SQL Query Result
      |                                                   | (e.g., DB Version)
      +---------------------------------------------------+

Explanation:

1. The attacker crafts a malicious HTTP request containing SQL injection payloads.
2. The web server receives the request and, due to the vulnerability, passes the malicious input directly to the database.
3. The database server executes the injected SQL query.
4. The database returns the result of the injected query (e.g., the database version) back to the web server.
5. The web server might then display this information to the attacker.

Source references

• Paper Title: SoftBizScripts Hosting Script SQL Injection Vunerability
• Author: 41.w4r10r
• Published: 2010-04-28
• Exploit-DB Paper URL: https://www.exploit-db.com/papers/12439

Original Exploit-DB Content (Verbatim)

# Exploit Title: SoftBizScripts Hosting Script SQL Injection Vunerability
# Date: 29-4-2010
# Author: 41.w4r10r
# Vendor Link : http://softbizscripts.com/
# Version: Web Application
# Tested on: Apcahe/Unix
# CVE : [if exists]
# Dork :  inurl:"browsecats.php?cid="
# Code :
---------------------------------------------------------------------------------------
############################################################################
#Greetz to all Andhra Hackers and ICW Memebers[Indian Cyber
Warriors]
#Thanks:
SaiSatish,FB1H2S,Godwin_Austin,Micr0,Harin,Jappy,Dark_Blue,sid3^3f3c7
#Shoutz: hg_H@x0r,r45c4l,Yash,Hackuin,unn4m3d
#Catch us at www.andhrahackers.com or www.teamicw.in
############################################################################



Exploited Link :

http://[site]m/browsecats.php?cid=2'

example :

http://[site]/browsecats.php?cid=2+union+select+1,version(),3,4--



#41.w4r10r mailto:41.w4r10r@andhrahackers.com