CVE-2024-42323
📋 TL;DR
This vulnerability allows authorized attackers to execute arbitrary code on Apache HertzBeat servers by exploiting insecure deserialization in SnakeYaml XML parsing. It affects all Apache HertzBeat (incubating) installations before version 1.6.0. Attackers must have valid credentials to exploit this vulnerability.
💻 Affected Systems
- Apache HertzBeat (incubating)
📦 What is this software?
Hertzbeat by Apache
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data theft, and lateral movement within the network.
Likely Case
Unauthorized code execution leading to data exfiltration, service disruption, or installation of backdoors.
If Mitigated
Limited impact due to proper access controls and network segmentation, though still poses significant risk.
🎯 Exploit Status
Exploitation requires valid credentials and knowledge of the vulnerable SnakeYaml deserialization process.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.0
Vendor Advisory: https://lists.apache.org/thread/dwpwm572sbwon1mknlwhkpbom2y7skbx
Restart Required: Yes
Instructions:
1. Download Apache HertzBeat version 1.6.0 or later from official sources. 2. Stop the HertzBeat service. 3. Backup configuration and data. 4. Replace existing installation with new version. 5. Restart the HertzBeat service.
🔧 Temporary Workarounds
Restrict User Access
allLimit user accounts to only necessary personnel and implement strong authentication controls
Network Segmentation
allIsolate HertzBeat instances from critical systems and implement strict network access controls
🧯 If You Can't Patch
- Implement strict access controls and monitor for suspicious user activity
- Deploy network-based intrusion detection systems to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check HertzBeat version using the web interface or configuration files. If version is below 1.6.0, the system is vulnerable.Check Version:
Check the HertzBeat web interface dashboard or examine the application.properties/version file in the installation directory.Verify Fix Applied:
Verify the installed version is 1.6.0 or higher through the web interface or by checking the application version file.📡 Detection & Monitoring
Log Indicators:
- Unusual XML parsing errors in application logs
- Suspicious user activity patterns
- Unexpected process execution
Network Indicators:
- Unusual outbound connections from HertzBeat server
- Suspicious XML payloads in HTTP requests
SIEM Query:
source="hertzbeat" AND ("SnakeYaml" OR "deserialization" OR "XML parsing error")