CVE-2021-3412
📋 TL;DR
CVE-2021-3412 is a brute force vulnerability in all versions of 3Scale developer portal that lacks login attempt protections. Attackers can exploit this to bypass authentication, potentially accessing privileged information or conducting further attacks. All organizations using 3Scale developer portal are affected.
💻 Affected Systems
- Red Hat 3Scale API Management Developer Portal
📦 What is this software?
3scale by Redhat
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover leading to unauthorized access to sensitive developer data, API keys, and potential lateral movement into connected systems.
Likely Case
Unauthorized access to developer portal accounts, exposure of API credentials, and potential data exfiltration from the portal.
If Mitigated
Failed login attempts logged but no successful exploitation due to rate limiting or account lockout mechanisms.
🎯 Exploit Status
Exploitation requires only standard brute force tools; no special technical knowledge needed beyond basic attack tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Red Hat advisories for specific patched versions
Vendor Advisory: https://access.redhat.com/security/cve/cve-2021-3412
Restart Required: Yes
Instructions:
1. Update 3Scale to the latest patched version via your package manager
2. Restart the 3Scale services
3. Verify the fix by testing login rate limiting
🔧 Temporary Workarounds
Implement Web Application Firewall (WAF) Rules
allConfigure WAF to detect and block brute force attempts against login endpoints
Network Access Controls
allRestrict access to developer portal to trusted IP ranges only
🧯 If You Can't Patch
- Implement strong password policies and multi-factor authentication
- Deploy rate limiting at the network or application layer
- Monitor login attempts and implement account lockout after failed attempts
🔍 How to Verify
Check if Vulnerable:
Check if login attempts are unlimited by testing multiple failed logins without lockoutCheck Version:
rpm -qa | grep 3scale or check 3Scale admin interface for versionVerify Fix Applied:
Test that login attempts are rate-limited or trigger account lockout after configured threshold📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from same IP/user
- Unusual login patterns outside business hours
- Successful login after many failures
Network Indicators:
- High volume of POST requests to login endpoints
- Traffic patterns showing credential stuffing attempts
SIEM Query:
source="3scale" AND (event="login_failed" count>10 within 5min) OR (event="login_success" after multiple failures)