CVE-2024-6174
📋 TL;DR
Cloud-init grants root access to a hardcoded URL with a local IP address when detecting a non-x86 platform. This vulnerability affects systems using cloud-init on non-x86 architectures (like ARM, PowerPC) that haven't disabled platform enumeration in default configurations.
💻 Affected Systems
- cloud-init
📦 What is this software?
Cloud Init by Canonical
⚠️ Risk & Real-World Impact
Worst Case
Attackers could gain root access to the system by exploiting the hardcoded URL, potentially leading to complete system compromise, data theft, and lateral movement within the environment.
Likely Case
Unauthorized users gaining administrative access to cloud instances, allowing them to install malware, exfiltrate data, or disrupt services.
If Mitigated
Limited impact if platform enumeration is disabled or systems are properly segmented, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires the attacker to be able to reach the local IP address and trigger the platform detection mechanism.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 25.1.3
Vendor Advisory: https://github.com/canonical/cloud-init/releases/tag/25.1.3
Restart Required: No
Instructions:
1. Update cloud-init to version 25.1.3 or later using your package manager. 2. For Ubuntu/Debian: sudo apt update && sudo apt install cloud-init. 3. For RHEL/CentOS: sudo yum update cloud-init. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Disable platform enumeration
linuxModify cloud-init configuration to disable platform detection which triggers the vulnerability
echo 'disable_platform_detection: true' | sudo tee -a /etc/cloud/cloud.cfg.d/99-disable-platform.cfg
sudo cloud-init clean --logs
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected systems from untrusted networks
- Monitor for unusual root access patterns or connections to local IP addresses on non-x86 systems
🔍 How to Verify
Check if Vulnerable:
Check cloud-init version and system architecture: cloud-init --version && uname -mCheck Version:
cloud-init --versionVerify Fix Applied:
Verify cloud-init version is 25.1.3 or later: cloud-init --version📡 Detection & Monitoring
Log Indicators:
- Unusual root access events in auth.log/syslog
- Cloud-init logs showing platform detection on non-x86 systems
Network Indicators:
- Connections to local IP addresses from cloud-init processes
- Unexpected network traffic to hardcoded URLs
SIEM Query:
source="cloud-init" AND ("platform detection" OR "non-x86")