CVE-2024-3707: OpenGnsys Information Disclosure Flaw

CVE-2024-3707 Overview

CVE-2024-3707 is an information exposure vulnerability affecting OpenGnsys version 1.1.1d (Espeto). This vulnerability allows an attacker to enumerate all files in the web tree by accessing a PHP file, potentially exposing sensitive directory structures and file information to unauthorized parties.

Critical Impact

Attackers can enumerate the entire web directory structure of OpenGnsys installations, potentially revealing sensitive files, configuration paths, and application structure that could be leveraged for further attacks.

Affected Products

• OpenGnsys version 1.1.1d (Espeto)

Discovery Timeline

• 2024-04-12 - CVE-2024-3707 published to NVD
• 2025-11-04 - Last updated in NVD database

Technical Details for CVE-2024-3707

Vulnerability Analysis

This vulnerability is classified under CWE-548 (Exposure of Information Through Directory Listing). The flaw exists in OpenGnsys version 1.1.1d, where a PHP file allows unauthenticated remote attackers to enumerate all files within the web application's directory tree. The network-accessible nature of this vulnerability means any attacker with HTTP access to the OpenGnsys web interface can exploit it without requiring authentication or user interaction.

The information disclosure affects confidentiality by revealing internal file structures, which could provide attackers with valuable reconnaissance data for planning more sophisticated attacks against the system.

Root Cause

The root cause of CVE-2024-3707 is improper access control on a PHP file that provides directory listing functionality. The application fails to properly restrict access to file enumeration capabilities, allowing unauthenticated users to view the complete web tree structure. This represents a common web application security misconfiguration where sensitive functionality is exposed without appropriate authorization checks.

Attack Vector

The attack vector is network-based, requiring no authentication, no user interaction, and having low complexity. An attacker can remotely access the vulnerable PHP endpoint to enumerate files and directories within the web application structure. This information disclosure can reveal:

• Internal file naming conventions and application structure
• Configuration file locations
• Potentially sensitive scripts and resources
• Version-specific files that could indicate other vulnerabilities

The vulnerability is exploited through standard HTTP requests to the vulnerable PHP file, making it accessible to any network attacker who can reach the OpenGnsys web interface.

Detection Methods for CVE-2024-3707

Indicators of Compromise

• Unusual HTTP requests targeting PHP files associated with directory enumeration
• Excessive requests from single IP addresses attempting to map the web directory structure
• Log entries showing sequential or systematic access patterns to various directory paths
• Unexpected access to internal configuration or system files from external sources

Detection Strategies

• Monitor web server access logs for requests that return directory listings or file enumeration data
• Implement web application firewall (WAF) rules to detect and block directory traversal and enumeration attempts
• Configure intrusion detection systems (IDS) to alert on patterns consistent with web application reconnaissance
• Review Apache or Nginx logs for unusual 200 OK responses to requests that should normally be restricted

Monitoring Recommendations

• Enable detailed access logging on the OpenGnsys web server to capture all incoming requests
• Set up alerts for high-volume requests from individual IP addresses targeting PHP endpoints
• Monitor for unusual patterns in file access that could indicate systematic enumeration
• Regularly audit web server configurations to ensure directory listing is disabled

How to Mitigate CVE-2024-3707

Immediate Actions Required

• Apply the official security patch from OpenGnsys immediately
• Restrict network access to the OpenGnsys web interface using firewall rules
• Implement IP whitelisting to limit access to trusted administrative networks
• Review access logs to determine if the vulnerability has already been exploited

Patch Information

OpenGnsys has released an official security patch addressing CVE-2024-3707 and related vulnerabilities. Administrators should apply the patch as documented in the OpenGnsys Security Patch CVE-2024-370X advisory. For additional technical details, refer to the INCIBE CERT Advisory on Vulnerabilities.

Workarounds

• Disable directory listing at the web server level by configuring Apache with Options -Indexes
• Implement authentication requirements for all PHP endpoints that could expose sensitive information
• Use a reverse proxy with access control rules to limit exposure of internal application files
• Consider network segmentation to isolate OpenGnsys from untrusted networks until patching is complete

# Apache configuration to disable directory listing
# Add to .htaccess or httpd.conf
Options -Indexes

# Restrict access to sensitive PHP files
<FilesMatch "\.php$">
    Require ip 192.168.1.0/24
</FilesMatch>