CVE-2024-23052
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on WuKongCRM systems by exploiting a deserialization flaw in the fastjson component's parseObject() function. Any organization running the affected WuKongCRM version is vulnerable to complete system compromise. The high CVSS score of 9.8 indicates critical severity with low attack complexity.
💻 Affected Systems
- WuKongOpenSource WukongCRM
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary commands, steal sensitive data, install persistent backdoors, pivot to internal networks, and potentially destroy systems.
Likely Case
Remote code execution leading to data theft, ransomware deployment, or unauthorized access to customer relationship management data and connected systems.
If Mitigated
Limited impact if proper network segmentation, application firewalls, and input validation are in place, though exploitation risk remains high.
🎯 Exploit Status
Public GitHub repositories contain proof-of-concept code demonstrating exploitation. Fastjson vulnerabilities are commonly weaponized due to their prevalence in Java applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: Yes
Instructions:
1. Check WuKongCRM GitHub repository for security updates
2. Update fastjson dependency to a secure version (1.2.83 or later)
3. Rebuild and redeploy the application
4. Restart all affected services
🔧 Temporary Workarounds
Fastjson Version Upgrade
allManually upgrade the fastjson library to a secure version that patches the deserialization vulnerability
Update Maven/Gradle dependency to com.alibaba:fastjson:1.2.83 or later
Rebuild application with updated dependencies
Input Validation Filter
allImplement strict input validation and filtering for all JSON parsing operations
Configure application to use SafeMode or implement custom deserialization filters
Add request validation middleware
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WuKongCRM from critical systems
- Deploy a web application firewall (WAF) with rules to detect and block fastjson exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check application dependencies for fastjson version <1.2.83 and verify WuKongCRM version matches affected versionCheck Version:
Check pom.xml or build.gradle for fastjson version, or run: java -cp wukongcrm.jar com.alibaba.fastjson.VersionVerify Fix Applied:
Verify fastjson dependency is updated to 1.2.83 or later and test JSON parsing functionality📡 Detection & Monitoring
Log Indicators:
- Unusual Java deserialization errors
- Suspicious class loading in application logs
- Unexpected process execution from Java runtime
Network Indicators:
- HTTP requests with malicious JSON payloads targeting parseObject endpoints
- Outbound connections from WuKongCRM to unknown external IPs
SIEM Query:
source="wukongcrm.logs" AND ("parseObject" OR "fastjson" OR "ClassNotFoundException") AND severity=ERROR🔗 References
- https://github.com/By-Yexing/Vulnerability_JAVA/blob/main/2024/WukongCRM_9.0.md#1remote-code-execution-vulnerability
- https://github.com/WuKongOpenSource/WukongCRM-9.0-JAVA/issues/28
- https://github.com/By-Yexing/Vulnerability_JAVA/blob/main/2024/WukongCRM_9.0.md#1remote-code-execution-vulnerability
- https://github.com/WuKongOpenSource/WukongCRM-9.0-JAVA/issues/28
