CVE-2024-5552
📋 TL;DR
This CVE describes a Regular Expression Denial of Service (ReDoS) vulnerability in kubeflow/kubeflow's email validation mechanism. Attackers can remotely exploit this without authentication by sending specially crafted input that causes excessive CPU consumption, potentially leading to service disruption. This affects users running kubeflow/kubeflow with the vulnerable centraldashboard-angular backend component.
💻 Affected Systems
- kubeflow/kubeflow
📦 What is this software?
Kubeflow by Kubeflow
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption through resource exhaustion, potentially affecting all kubeflow services and dependent applications.
Likely Case
Degraded performance or temporary service unavailability for the centraldashboard component.
If Mitigated
Minimal impact with proper input validation and resource limits in place.
🎯 Exploit Status
ReDoS attacks are well-understood and easy to weaponize. No authentication required makes exploitation trivial.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check kubeflow security advisories for specific version
Vendor Advisory: https://github.com/kubeflow/kubeflow/security/advisories
Restart Required: Yes
Instructions:
1. Check kubeflow security advisories for patch details
2. Update kubeflow to patched version
3. Restart centraldashboard-angular component
4. Verify email validation functionality
🔧 Temporary Workarounds
Input Validation Filter
allImplement input length limits and validation before email regex processing
# Add input validation in application code
# Limit email field length to reasonable size (e.g., 254 chars)
Resource Limits
linuxSet CPU limits on centraldashboard-angular pods to prevent complete exhaustion
kubectl patch deployment centraldashboard -p '{"spec":{"template":{"spec":{"containers":[{"name":"centraldashboard","resources":{"limits":{"cpu":"500m"}}}]}}}}'
🧯 If You Can't Patch
- Implement WAF rules to block suspicious email patterns
- Rate limit requests to email validation endpoints
🔍 How to Verify
Check if Vulnerable:
Check if running vulnerable kubeflow version with centraldashboard-angular componentCheck Version:
kubectl get pods -n kubeflow -l app=centraldashboard -o jsonpath='{.items[*].spec.containers[*].image}'Verify Fix Applied:
Test email validation with edge cases and monitor CPU usage📡 Detection & Monitoring
Log Indicators:
- High CPU usage spikes in centraldashboard logs
- Slow response times for email validation requests
- Repeated failed email validation attempts
Network Indicators:
- Unusual patterns of requests to email validation endpoints
- Requests with extremely long email addresses
SIEM Query:
source="kubeflow" AND ("centraldashboard" OR "email validation") AND (cpu_usage>90 OR response_time>5s)