CVE-2024-21652
📋 TL;DR
This critical vulnerability in Argo CD allows attackers to bypass brute force login protection by exploiting a chain of flaws including a Denial of Service weakness and in-memory data storage issues. Attackers can crash the service affecting all users while making unlimited login attempts, significantly increasing the risk of account compromise. All Argo CD users running vulnerable versions are affected.
💻 Affected Systems
- Argo CD
📦 What is this software?
Argo Cd by Argoproj
Argo Cd by Argoproj
Argo Cd by Argoproj
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption via DoS combined with successful credential brute-forcing leading to full system compromise and unauthorized access to Kubernetes clusters.
Likely Case
Service availability issues and increased risk of account takeover through successful brute force attacks against weak credentials.
If Mitigated
Limited impact with proper network segmentation, strong authentication, and monitoring, though service disruption risk remains.
🎯 Exploit Status
Exploitation requires chaining multiple vulnerabilities but does not require authentication. The advisory provides technical details but no public exploit code.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.8.13, 2.9.9, or 2.10.4
Vendor Advisory: https://github.com/argoproj/argo-cd/security/advisories/GHSA-x32m-mvfj-52xv
Restart Required: Yes
Instructions:
1. Identify your current Argo CD version. 2. Upgrade to the appropriate patched version (2.8.13 for 2.8.x, 2.9.9 for 2.9.x, 2.10.4 for 2.10.x). 3. Restart Argo CD services. 4. Verify the upgrade was successful.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict access to Argo CD API endpoints to trusted IP addresses only
# Use Kubernetes NetworkPolicy or firewall rules to restrict access
kubectl apply -f network-policy.yaml
Rate Limiting Proxy
linuxDeploy a reverse proxy with rate limiting in front of Argo CD
# Configure nginx or similar proxy with rate limiting
limit_req_zone $binary_remote_addr zone=argocd:10m rate=10r/m;
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Argo CD from untrusted networks
- Enable multi-factor authentication and enforce strong password policies to reduce brute force effectiveness
🔍 How to Verify
Check if Vulnerable:
Check Argo CD version via UI or API. Vulnerable if version is below 2.8.13, 2.9.9, or 2.10.4 depending on major version.Check Version:
argocd version --client && argocd version --serverVerify Fix Applied:
Confirm version is 2.8.13, 2.9.9, or 2.10.4 or higher. Test login attempts to verify brute force protection is working.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single IP
- Unusual authentication patterns
- Service crash/restart logs
Network Indicators:
- High volume of authentication requests to /api/v1/session endpoint
- Unusual traffic patterns to Argo CD API
SIEM Query:
source="argocd" AND (event="login_failed" count>10 per src_ip per hour) OR (event="service_crash")