CVE-2025-63690
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on pig-mesh Pig servers by exploiting a reflection-based class execution flaw in the Quartz scheduled task management function. Attackers can leverage Tomcat's ELProcessor.eval() method to achieve command execution. All pig-mesh Pig deployments running version 3.8.2 or below are affected.
💻 Affected Systems
- pig-mesh Pig
📦 What is this software?
Pig by Pig4cloud
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to execute arbitrary commands with the application's privileges, potentially leading to data theft, lateral movement, or complete system takeover.
Likely Case
Remote code execution leading to deployment of malware, backdoors, or ransomware on vulnerable servers.
If Mitigated
Limited impact if proper network segmentation, least privilege principles, and input validation are implemented.
🎯 Exploit Status
Exploitation requires authentication to access the Quartz management interface. The vulnerability is well-documented with public proof-of-concept.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.8.3 or later
Vendor Advisory: https://github.com/pig-mesh/pig/issues/1199
Restart Required: Yes
Instructions:
1. Upgrade pig-mesh Pig to version 3.8.3 or later. 2. Restart the application server. 3. Verify the fix by checking the version and testing the Quartz management function.
🔧 Temporary Workarounds
Disable Quartz Management Interface
allTemporarily disable or restrict access to the Quartz scheduled task management function.
Modify application configuration to disable quartz management endpoints
Network Access Control
allRestrict network access to the pig-mesh Pig administration interface.
Configure firewall rules to limit access to trusted IP addresses only
🧯 If You Can't Patch
- Implement strict authentication and authorization controls for the Quartz management interface
- Deploy web application firewall (WAF) rules to block suspicious reflection-based requests
🔍 How to Verify
Check if Vulnerable:
Check if pig-mesh Pig version is 3.8.2 or below and if the Quartz management function is accessible.Check Version:
Check application logs or configuration files for pig-mesh Pig version informationVerify Fix Applied:
Verify the application version is 3.8.3 or later and test that the Quartz management function no longer allows arbitrary class execution.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to Quartz management endpoints
- Suspicious class loading or reflection operations in logs
- Unexpected process execution from the application
Network Indicators:
- HTTP requests to quartz management endpoints with unusual parameters
- Outbound connections from the application server to unexpected destinations
SIEM Query:
source="pig-mesh" AND (uri="/quartz/*" OR message="ELProcessor" OR message="reflection")