CVE-2024-29006
📋 TL;DR
This vulnerability allows attackers to spoof their IP address using the x-forwarded-for HTTP header, potentially bypassing authentication in CloudStack management servers. All CloudStack deployments using default configurations are affected. The issue enables attackers to appear as legitimate users from trusted IP addresses.
💻 Affected Systems
- Apache CloudStack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of CloudStack management infrastructure leading to unauthorized access, data exfiltration, and cloud resource manipulation.
Likely Case
Authentication bypass allowing unauthorized API access, privilege escalation, and operational disruption.
If Mitigated
Limited impact if proper network segmentation and authentication controls are in place.
🎯 Exploit Status
Simple HTTP header manipulation required; no authentication needed to attempt exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.18.1.1 or 4.19.0.1
Vendor Advisory: https://lists.apache.org/thread/82f46pv7mvh95ybto5hn8wlo6g8jhjvp
Restart Required: Yes
Instructions:
1. Backup CloudStack configuration and database. 2. Download patched version from Apache CloudStack repository. 3. Stop CloudStack management service. 4. Apply patch or upgrade to fixed version. 5. Restart CloudStack management service. 6. Verify functionality.
🔧 Temporary Workarounds
Configure Reverse Proxy Validation
allConfigure reverse proxy or load balancer to strip or validate x-forwarded-for headers before reaching CloudStack.
# Configure nginx: proxy_set_header X-Forwarded-For $remote_addr;
# Configure Apache: RequestHeader set X-Forwarded-For %{REMOTE_ADDR}e
Network Access Controls
linuxRestrict CloudStack management interface access to trusted IP ranges only.
# Example iptables rule: iptables -A INPUT -p tcp --dport 8080 -s TRUSTED_IP_RANGE -j ACCEPT
🧯 If You Can't Patch
- Implement strict network segmentation to isolate CloudStack management interface
- Deploy Web Application Firewall (WAF) to filter malicious x-forwarded-for headers
🔍 How to Verify
Check if Vulnerable:
Check CloudStack version and verify if x-forwarded-for header is being logged as source IP in API request logs.Check Version:
cloudstack-setup-databases --versionVerify Fix Applied:
After patching, test with spoofed x-forwarded-for header and verify real client IP is logged instead.📡 Detection & Monitoring
Log Indicators:
- API requests with mismatched source IP and x-forwarded-for header values
- Authentication attempts from unexpected IP addresses
Network Indicators:
- HTTP requests with manipulated x-forwarded-for headers
- Unusual API call patterns from single IP
SIEM Query:
source="cloudstack.log" AND "x-forwarded-for" AND NOT (src_ip=x_forwarded_for_ip)