CVE-2023-41578
📋 TL;DR
Jeecg Boot up to version 3.5.3 contains an arbitrary file read vulnerability in the /testConnection interface. This allows attackers to read sensitive files from the server filesystem without authentication. Organizations using vulnerable Jeecg Boot versions are affected.
💻 Affected Systems
- Jeecg Boot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive configuration files, database credentials, SSH keys, or other critical system files, leading to complete system compromise.
Likely Case
Attackers will read configuration files containing database credentials, API keys, and other sensitive information to escalate privileges or pivot to other systems.
If Mitigated
With proper network segmentation and access controls, impact is limited to the compromised application server's filesystem.
🎯 Exploit Status
The vulnerability is simple to exploit via HTTP requests to the vulnerable endpoint with path traversal payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v3.5.4 or later
Vendor Advisory: https://github.com/jeecgboot/jeecg-boot
Restart Required: Yes
Instructions:
1. Upgrade Jeecg Boot to version 3.5.4 or later. 2. Restart the application server. 3. Verify the /testConnection endpoint is no longer vulnerable.
🔧 Temporary Workarounds
Block /testConnection endpoint
allUse web application firewall or reverse proxy to block access to the vulnerable endpoint
# Example nginx location block
location /testConnection { deny all; }
# Example Apache .htaccess
RedirectMatch 403 ^/testConnection
Disable vulnerable endpoint
allModify application configuration to disable or restrict the /testConnection interface
# Check Jeecg Boot configuration files for testConnection settings
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the Jeecg Boot application
- Deploy a web application firewall with path traversal protection rules
🔍 How to Verify
Check if Vulnerable:
Send HTTP GET request to /testConnection with path traversal payload like /testConnection?file=../../../../etc/passwdCheck Version:
Check application.properties or pom.xml for jeecg-boot versionVerify Fix Applied:
Attempt the same exploit after patching - should receive error or no file content📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /testConnection with ../ patterns
- Unusual file access patterns from web application
Network Indicators:
- HTTP requests containing path traversal sequences to /testConnection endpoint
SIEM Query:
source="web_server" AND uri="/testConnection" AND (uri="*../*" OR uri="*..\\*" OR uri="*%2e%2e%2f*")