CVE-2024-32476
📋 TL;DR
This CVE describes a denial-of-service vulnerability in Argo CD where specially crafted ignoreDifferences configurations can cause excessive memory consumption via jq processing, leading to out-of-memory (OOM) conditions. The vulnerability affects all Argo CD users with versions below the patched releases. Attackers with permission to create or modify Application resources can trigger this DoS condition.
💻 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 of Argo CD controller, halting all GitOps deployments and potentially affecting Kubernetes cluster stability if resource exhaustion impacts other components.
Likely Case
Argo CD controller crashes or becomes unresponsive, requiring manual restart and causing temporary disruption to continuous delivery pipelines.
If Mitigated
Minimal impact with proper resource limits and monitoring; controller may restart automatically but deployments could be delayed.
🎯 Exploit Status
Exploitation requires authenticated access to Argo CD API with permissions to modify Application resources. The vulnerability is in jq processing logic within ignoreDifferences functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.10.7, 2.9.12, or 2.8.16
Vendor Advisory: https://github.com/argoproj/argo-cd/security/advisories/GHSA-9m6p-x4h2-6frq
Restart Required: Yes
Instructions:
1. Backup current Argo CD configuration and data. 2. Update Argo CD to version 2.10.7, 2.9.12, or 2.8.16 using your deployment method (Helm, kubectl, etc.). 3. Restart Argo CD components. 4. Verify the update and monitor for stability.
🔧 Temporary Workarounds
Restrict Application write permissions
allLimit who can create or modify Application resources in Argo CD to reduce attack surface.
# Review and update RBAC policies to restrict Application write access
# kubectl edit role/argocd-application-controller -n argocd
Implement resource limits
allSet memory limits on Argo CD controller pods to prevent complete cluster resource exhaustion.
# Add to Argo CD controller deployment spec:
resources:
limits:
memory: "2Gi"
requests:
memory: "512Mi"
🧯 If You Can't Patch
- Implement strict RBAC controls to limit Application resource modifications to trusted users only.
- Deploy monitoring and alerting for Argo CD controller memory usage and restart automatically if OOM occurs.
🔍 How to Verify
Check if Vulnerable:
Check Argo CD version: if running version below 2.10.7, 2.9.12, or 2.8.16, you are vulnerable.Check Version:
argocd version --client && argocd version --serverVerify Fix Applied:
Confirm Argo CD version is 2.10.7, 2.9.12, or 2.8.16 or higher, and test that ignoreDifferences configurations with complex jq expressions no longer cause excessive memory usage.📡 Detection & Monitoring
Log Indicators:
- Argo CD controller pod OOM kills
- High memory usage alerts from Argo CD components
- Application sync failures with memory-related errors
Network Indicators:
- Unusual number of Application update requests from single source
SIEM Query:
source="kubernetes" "argocd" ("OOM" OR "out of memory" OR "memory limit exceeded")🔗 References
- https://github.com/argoproj/argo-cd/commit/7893979a1e78d59cedd0ba790ded24e30bb40657
- https://github.com/argoproj/argo-cd/commit/9e5cc5a26ff0920a01816231d59fdb5eae032b5a
- https://github.com/argoproj/argo-cd/commit/e2df7315fb7d96652186bf7435773a27be330cac
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-9m6p-x4h2-6frq
- https://github.com/argoproj/argo-cd/commit/7893979a1e78d59cedd0ba790ded24e30bb40657
- https://github.com/argoproj/argo-cd/commit/9e5cc5a26ff0920a01816231d59fdb5eae032b5a
- https://github.com/argoproj/argo-cd/commit/e2df7315fb7d96652186bf7435773a27be330cac
- https://github.com/argoproj/argo-cd/security/advisories/GHSA-9m6p-x4h2-6frq
