CVE-2024-38346
📋 TL;DR
This critical vulnerability in Apache CloudStack allows unauthenticated attackers to execute arbitrary commands on hypervisors and management servers via the cluster service port (default 9090). It affects CloudStack deployments with the vulnerable cluster service exposed, potentially leading to complete infrastructure compromise.
💻 Affected Systems
- Apache CloudStack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of CloudStack managed infrastructure including hypervisors, management servers, and all hosted virtual machines, leading to data theft, service disruption, and lateral movement.
Likely Case
Remote code execution on CloudStack management servers and hypervisors, allowing attackers to deploy malware, steal credentials, and disrupt cloud operations.
If Mitigated
Limited to internal network if proper network segmentation is implemented, with no impact if patched or service is not exposed.
🎯 Exploit Status
Exploitation requires only network access to port 9090 with no authentication. The vulnerability is in command injection in cluster service commands.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.18.2.1 or 4.19.0.2 or later
Vendor Advisory: https://cloudstack.apache.org/blog/security-release-advisory-4.19.0.2-4.18.2.1
Restart Required: Yes
Instructions:
1. Backup your CloudStack configuration and database. 2. Download the patched version from Apache CloudStack website. 3. Stop CloudStack services. 4. Apply the patch or upgrade to the fixed version. 5. Restart CloudStack services. 6. Verify the upgrade was successful.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to cluster service port 9090 to only trusted CloudStack management server peers using firewall rules.
iptables -A INPUT -p tcp --dport 9090 -s <trusted_ip> -j ACCEPT
iptables -A INPUT -p tcp --dport 9090 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CloudStack management servers and restrict access to port 9090 only to required peer systems.
- Deploy network-based intrusion detection/prevention systems to monitor and block suspicious traffic to port 9090.
🔍 How to Verify
Check if Vulnerable:
Check if CloudStack version is below 4.18.2.1 or 4.19.0.2 and if port 9090 is accessible from untrusted networks.Check Version:
cloudstack-setup-databases --versionVerify Fix Applied:
Verify CloudStack version is 4.18.2.1, 4.19.0.2 or later and test that command injection attempts on port 9090 are blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual commands executed via cluster service
- Multiple connection attempts to port 9090 from unauthorized sources
- Error logs showing command injection attempts
Network Indicators:
- Unusual traffic patterns to port 9090
- Command injection payloads in network traffic to port 9090
- Connections to port 9090 from non-peer systems
SIEM Query:
source_port:9090 AND (payload_contains:"$" OR payload_contains:"|" OR payload_contains:";" OR payload_contains:"`")🔗 References
- http://www.openwall.com/lists/oss-security/2024/07/05/1
- https://cloudstack.apache.org/blog/security-release-advisory-4.19.0.2-4.18.2.1
- https://lists.apache.org/thread/6l51r00csrct61plkyd3qg3fj99215d1
- https://www.shapeblue.com/shapeblue-security-advisory-apache-cloudstack-security-releases-4-18-2-1-and-4-19-0-2/
- http://www.openwall.com/lists/oss-security/2024/07/05/1
- https://cloudstack.apache.org/blog/security-release-advisory-4.19.0.2-4.18.2.1
- https://lists.apache.org/thread/6l51r00csrct61plkyd3qg3fj99215d1
- https://www.shapeblue.com/shapeblue-security-advisory-apache-cloudstack-security-releases-4-18-2-1-and-4-19-0-2/
