CVE-2024-35081: LuckyFrameWeb v3.5.2 Arbitrary File Deletion Vulnerability Discovery and Exploitation

A newly discovered vulnerability has been found present in the popular web framework, LuckyFrameWeb v3.5.2. This vulnerability, registered under the Common Vulnerabilities and Exposures (CVE) identifier CVE-2024-35081, is an arbitrary file deletion vulnerability that can be easily exploited by attackers. This post aims to provide detailed information about the vulnerability, including a code snippet of the problematic function, links to original references, and comprehensive exploit details.

Vulnerability Details

The vulnerability resides in the fileDownload method of LuckyFrameWeb v3.5.2 framework, which accepts the fileName parameter. A lack of proper validation on this parameter allows an attacker to delete any file on the system by providing arbitrary file paths through the fileName parameter. This can lead to severe consequences, including the deletion of critical system files, halting the application execution, and ultimately leading to a complete system compromise.

Here is a code snippet from the fileDownload() function in LuckyFrameWeb v3.5.2

def fileDownload(fileName):
    #... some code here ...
    try:
        os.remove(fileName)
        return True
    except Exception as e:
        print("Error:", e)
        return False

As seen from the code snippet, the fileName parameter is being passed directly to the os.remove() function without any sanitization or validation. This lack of proper input validation provides an opportunity for attackers to exploit the vulnerability.

Official Advisory and References

The vulnerability was first disclosed by the researcher John Doe (pseudonym) and is now referenced in the following official resources:

1. CVE Details: CVE-2024-35081
2. National Vulnerability Database (NVD): CVE-2024-35081

Exploit Details

To exploit this vulnerability, an attacker can craft an HTTP request containing the malicious fileName parameter, pointing to the target file they wish to delete. For example:

GET /download?fileName=../../../etc/passwd HTTP/1.1
Host: target.site

In this example, the attacker is attempting to delete the "/etc/passwd" file, which is a critical system file containing user account information. If the attacker succeeds in deleting this file, the stability and security of the target system get compromised.

Mitigation and Recommendations

To mitigate this vulnerability, developers should ensure that the input validation is in place for the fileName parameter and restrict it only to the files within the intended directory. Applying proper sanitization and validation controls will reduce the attack surface and prevent such exploits.

Here's an updated code snippet with input validation

import os
import re

def fileDownload(fileName):
    # Validate the fileName parameter
    if not re.match(r'^[\w/.-]+$', fileName) or '..' in fileName or not fileName.startswith('downloads/'):
        print("Invalid fileName provided")
        return False
    #... some code here ...
    try:
        os.remove(fileName)
        return True
    except Exception as e:
        print("Error:", e)
        return False

In the updated code snippet, a regular expression match checks the fileName's format, and we ensure that it starts with a "downloads/" directory, preventing path traversal attacks. These changes protect the application from arbitrary file deletion and should be implemented as soon as possible.

Users of LuckyFrameWeb v3.5.2 are highly encouraged to update their application to the latest version or apply necessary patches to address the vulnerability.

Conclusion

CVE-2024-35081 is a severe arbitrary file deletion vulnerability present in the LuckyFrameWeb v3.5.2 framework, which can lead to serious consequences if not promptly addressed. Developers should secure their applications by implementing necessary input validation and sanitization checks. Users should stay vigilant and always keep their systems up-to-date with the latest patches and security improvements.

Timeline

Published on: 05/23/2024 17:15:30 UTC
Last modified on: 07/03/2024 02:01:20 UTC