CVE-2024-45219
📋 TL;DR
Apache CloudStack has a vulnerability where users can upload malicious KVM-compatible templates or volumes that bypass validation checks. This allows attackers to gain access to host filesystems, compromising data integrity and availability. Affected versions are 4.0.0 through 4.18.2.3 and 4.19.0.0 through 4.19.1.1.
💻 Affected Systems
- Apache CloudStack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of KVM-based infrastructure managed by CloudStack, leading to data loss, denial of service, and unauthorized access to all hosted systems.
Likely Case
Attackers gain access to host filesystems, potentially compromising multiple virtual machines and sensitive data.
If Mitigated
Limited impact if proper scanning and validation of uploaded templates/volumes is implemented alongside network segmentation.
🎯 Exploit Status
Requires authenticated user access to upload templates/volumes. Exploitation involves creating malicious disk images that reference host filesystems.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.18.2.4 or 4.19.1.2
Vendor Advisory: https://cloudstack.apache.org/blog/security-release-advisory-4.18.2.4-4.19.1.2
Restart Required: Yes
Instructions:
1. Backup configuration and data. 2. Download patched version from Apache CloudStack website. 3. Stop CloudStack services. 4. Apply patch or upgrade to fixed version. 5. Restart services and verify functionality.
🔧 Temporary Workarounds
Scan existing templates and volumes
linuxScan secondary storage for malicious disk images using qemu-img to detect host filesystem references
for file in $(find /path/to/storage/ -type f -regex [a-f0-9\-]*.*); do echo "Retrieving file [$file] info. If the output is not empty, that might indicate a compromised disk; check it carefully."; qemu-img info -U $file | grep file: ; printf "\n\n"; done
Comprehensive disk feature analysis
linuxCheck all template/volume features for each disk to identify suspicious configurations
for file in $(find /path/to/storage/ -type f -regex [a-f0-9\-]*.*); do echo "Retrieving file [$file] info."; qemu-img info -U $file; printf "\n\n"; done
🧯 If You Can't Patch
- Restrict template/volume upload permissions to trusted administrators only
- Implement strict network segmentation between CloudStack management and production environments
🔍 How to Verify
Check if Vulnerable:
Check CloudStack version: if between 4.0.0-4.18.2.3 or 4.19.0.0-4.19.1.1, system is vulnerableCheck Version:
Check CloudStack version in management interface or via 'cloudstack-setup-databases --version' commandVerify Fix Applied:
Verify version is 4.18.2.4 or higher, or 4.19.1.2 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual template/volume upload activity from non-admin users
- Multiple failed deployment attempts with custom templates
- Unexpected host filesystem access patterns
Network Indicators:
- Unusual outbound connections from CloudStack hosts
- Unexpected network traffic between VMs and host systems
SIEM Query:
source="cloudstack" AND (event="template.upload" OR event="volume.upload") AND user!="admin"🔗 References
- https://cloudstack.apache.org/blog/security-release-advisory-4.18.2.4-4.19.1.2
- https://lists.apache.org/thread/ktsfjcnj22x4kg49ctock3d9tq7jnvlo
- https://www.shapeblue.com/shapeblue-security-advisory-apache-cloudstack-security-releases-4-18-2-4-and-4-19-1-2/
- http://www.openwall.com/lists/oss-security/2024/10/15/2
