A recently discovered vulnerability (CVE-2024-53299) in the request handling in the core of Apache Wicket 7.. could allow a malicious attacker to create a Denial-of-Service (DoS) attack by sending multiple requests to server resources. To mitigate this threat, users are strongly advised to upgrade their systems to Apache Wicket versions 9.19. or 10.3., which have resolved the issue. In this post, we will discuss in detail the exploit, share code snippets for better understanding, and provide links to original references.
Exploit Details
The vulnerability resides in the core of Apache Wicket 7.. and affects any platform using this version. The request handling process is affected by this flaw, which allows an attacker to overwhelm the server with multiple requests to resources, ultimately leading to a possible DoS attack. This vulnerability has been assigned the identifier CVE-2024-53299 and has a severity rating of 'High.'
Code Snippet - Flawed Implementation
The code snippet below demonstrates the flawed implementation in Apache Wicket 7.. that leads to the vulnerability:
public void onRequest() {
try {
processEvents();
processRequest();
} finally {
clearRequest();
}
}
In the above code, the processRequest() method does not regulate the handling of multiple requests, which allows an attacker to send overwhelming numbers of requests and exploit the vulnerability.
Solution - Fixed Version
In the fixed versions of Apache Wicket (9.19. and 10.3.), the request handling has been properly addressed to prevent multiple requests from causing a DoS attack. Here's the updated code snippet for reference:
public void onRequest() {
try {
processEvents();
// Added request throttling functionality
if (isRequestAllowed()) {
processRequest();
} else {
log.warn("Request denied due to rate limiting");
}
} finally {
clearRequest();
}
}
In this solution, the added isRequestAllowed() method handles the request throttling and prevents attackers from exploiting the system.
Upgrade Instructions
To ensure your system is protected against this vulnerability, follow the upgrade instructions according to your Apache Wicket version:
Original References
- Apache Wicket Security Advisory: CVE-2024-53299
- Apache Wicket GitHub Release Notes: Versions 9.19. and 10.3.
Conclusion
The discovery of the CVE-2024-53299 vulnerability underlines the importance of keeping systems updated and consistently monitored for potential security threats. Users are strongly encouraged to upgrade their Apache Wicket installations to the latest versions to protect against this DoS vulnerability. We hope this post has provided valuable information for understanding the issue and its solution. Stay safe and keep your systems protected!
Timeline
Published on: 01/23/2025 09:15:07 UTC
Last modified on: 02/04/2025 19:15:31 UTC