CVE-2024-28718
📋 TL;DR
This vulnerability in OpenStack Magnum's cert_manager.py component allows remote attackers to execute arbitrary code on affected systems. It affects OpenStack Magnum deployments running the yoga-eom version, potentially compromising container orchestration clusters managed by Magnum.
💻 Affected Systems
- OpenStack Magnum
📦 What is this software?
Magnum by Openstack
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data exfiltration, lateral movement within the cloud environment, and potential destruction of container infrastructure.
Likely Case
Unauthorized access to container orchestration clusters, deployment of malicious containers, and credential theft from the Magnum environment.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting isolated Magnum components.
🎯 Exploit Status
Public proof-of-concept available on GitHub gist. Exploitation appears straightforward based on the vulnerability description and available references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in OpenStack review 907305
Vendor Advisory: https://bugs.launchpad.net/magnum/+bug/2047690
Restart Required: Yes
Instructions:
1. Apply the patch from OpenStack review 907305. 2. Update to a patched version of OpenStack Magnum. 3. Restart Magnum services to apply the fix.
🔧 Temporary Workarounds
Network Isolation
linuxRestrict network access to Magnum API endpoints to trusted sources only
iptables -A INPUT -p tcp --dport <magnum_port> -s <trusted_ips> -j ACCEPT
iptables -A INPUT -p tcp --dport <magnum_port> -j DROP
Component Disablement
allTemporarily disable or restrict access to cert_manager functionality if not essential
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Magnum components from other critical systems
- Deploy additional monitoring and alerting for suspicious activities targeting Magnum services
🔍 How to Verify
Check if Vulnerable:
Check Magnum version and verify if running yoga-eom version. Examine cert_manager.py for the vulnerable code pattern.Check Version:
openstack --version | grep magnumVerify Fix Applied:
Verify the patch from review 907305 is applied. Check that cert_manager.py no longer contains the vulnerable code pattern.📡 Detection & Monitoring
Log Indicators:
- Unusual certificate generation requests
- Suspicious API calls to cert_manager endpoints
- Unexpected process execution from Magnum services
Network Indicators:
- Unusual outbound connections from Magnum hosts
- Traffic patterns suggesting command and control activity
SIEM Query:
source="magnum" AND ("cert_manager" OR "certificate") AND (status="error" OR status="unusual")🔗 References
- https://bugs.launchpad.net/magnum/+bug/2047690
- https://gist.github.com/Fewword/f098d8d6375ac25e27b18c0e57be532f
- https://review.opendev.org/c/openstack/magnum/+/907305
- https://bugs.launchpad.net/magnum/+bug/2047690
- https://gist.github.com/Fewword/f098d8d6375ac25e27b18c0e57be532f
- https://review.opendev.org/c/openstack/magnum/+/907305
