CVE-2024-4306: Ofofonobsdev HubBank RCE Vulnerability

CVE-2024-4306 Overview

CVE-2024-4306 is an unrestricted file upload vulnerability in HubBank version 1.0.2, developed by ofofonobsdev. The flaw resides in the document upload fields, where the application fails to validate file types or contents. Authenticated users can upload arbitrary PHP files and execute them as webshells on the underlying web server. Successful exploitation grants attackers the ability to run arbitrary commands, pivot within the environment, and access sensitive banking data. The vulnerability is classified under CWE-434: Unrestricted Upload of File with Dangerous Type.

Critical Impact
Any registered HubBank user can achieve remote code execution by uploading a PHP webshell through document upload fields, compromising confidentiality, integrity, and availability of the application host.

Affected Products

HubBank 1.0.2
ofofonobsdev HubBank (all builds identified as 1.0.2)
Deployments using vulnerable document upload endpoints

Discovery Timeline

2024-04-29 - CVE-2024-4306 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-4306

Vulnerability Analysis

HubBank exposes document upload fields intended for identity verification and account documentation. The upload handler does not enforce file extension allow-listing, MIME type validation, or content inspection. An authenticated attacker submits a .php file containing arbitrary code through these upload forms. The web server subsequently interprets and executes the file when the attacker requests it, producing a functional webshell.

Because HubBank is a banking-oriented application, exploitation directly threatens financial data. Attackers can read the database configuration, exfiltrate customer records, tamper with transaction logic, or move laterally into internal networks. The vulnerability requires only low-privilege authentication, which registration workflows typically provide to any visitor.

Root Cause

The root cause is missing server-side validation on file uploads, mapped to [CWE-434]. The application trusts client-supplied file metadata and stores uploaded content in a web-accessible directory without renaming, sanitizing, or restricting executable extensions.

Attack Vector

Exploitation occurs over the network against an authenticated session. The attacker registers an account, navigates to a document upload field, and submits a PHP payload disguised as a permitted document type. After upload, the attacker requests the file directly through its stored path to trigger execution. See the INCIBE Security Notice for coordinated disclosure details.

No public proof-of-concept exploit or Exploit-DB entry has been published, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2024-4306

Indicators of Compromise

New files with .php, .phtml, .phar, or double extensions such as .jpg.php appearing in HubBank document upload directories
Web server access logs showing GET or POST requests directly to files inside upload paths
Outbound network connections from the HubBank web server to unfamiliar hosts following an upload event
Unexpected process spawning by the web server user, including shell interpreters and reconnaissance tools

Detection Strategies

Monitor the HubBank upload directory for file creation events and alert on any executable extensions
Inspect HTTP request bodies for PHP tags such as <?php inside multipart file uploads
Correlate authenticated upload actions with subsequent direct requests to the uploaded file path

Monitoring Recommendations

Enable verbose logging on the web application and forward logs to a centralized analytics platform for retention and correlation
Baseline expected process trees for the HubBank web server and alert on deviations such as sh, bash, nc, or wget execution
Track file integrity in web-writable directories using host-based file integrity monitoring

How to Mitigate CVE-2024-4306

Immediate Actions Required

Disable or restrict access to HubBank document upload functionality until an upstream fix is applied
Audit the upload directory for existing PHP or other executable files and remove any that are not part of the application
Restrict registration on production HubBank instances to reduce the pool of potential attackers
Rotate credentials, API keys, and database secrets accessible from the web server if unauthorized uploads are found

Patch Information

No vendor patch has been referenced in the enriched CVE data. Operators of HubBank 1.0.2 should monitor the INCIBE Security Notice and the vendor's distribution channels for updates. Until a fixed release is available, apply the workarounds below.

Workarounds

Configure the web server to prevent PHP execution inside the upload directory, for example by setting php_admin_flag engine off in Apache or removing PHP handlers in the Nginx location block
Enforce a strict server-side allow-list of file extensions and MIME types, rejecting anything outside .pdf, .png, .jpg, and other documented document formats
Rename uploaded files with random identifiers and strip original extensions before storage
Store uploaded documents outside the web root and serve them through an authenticated download handler that sets Content-Disposition: attachment

bash

# Nginx configuration example: block script execution in the uploads directory
location ^~ /uploads/ {
    location ~* \.(php|phtml|phar|pl|py|jsp|asp|sh|cgi)$ {
        deny all;
        return 403;
    }
}