CVE-2024-42759
📋 TL;DR
This vulnerability in Ellevo v.6.2.0.38160 allows remote attackers to escalate privileges via the /api/usuario/cadastrodesuplente endpoint. Attackers can exploit this to gain unauthorized administrative access. Organizations using this specific version of Ellevo are affected.
💻 Affected Systems
- Ellevo
📦 What is this software?
Ellevo by Ellevo
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where attackers gain administrative privileges, potentially accessing sensitive data, modifying configurations, or deploying malware across the network.
Likely Case
Attackers gain elevated privileges to access restricted functionality, modify user permissions, or approve unauthorized requests/tickets within the system.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring that detects privilege escalation attempts.
🎯 Exploit Status
The vulnerability appears to be an authentication bypass/privilege escalation via API endpoint manipulation. Attackers need some level of access but can then escalate privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://ellevo.com/
Restart Required: No
Instructions:
1. Check Ellevo vendor website for security updates
2. Upgrade to a patched version when available
3. Monitor vendor communications for specific patch information
🔧 Temporary Workarounds
Block Vulnerable Endpoint
allRestrict access to the /api/usuario/cadastrodesuplente endpoint using web application firewall or network controls
# WAF rule to block endpoint
# Example: deny access to /api/usuario/cadastrodesuplente
Network Segmentation
allIsolate Ellevo system from internet and restrict internal access to authorized users only
# Firewall rules to restrict access
# Example: iptables -A INPUT -p tcp --dport [ellevo-port] -s [trusted-networks] -j ACCEPT
🧯 If You Can't Patch
- Implement strict access controls and monitor all API calls to the vulnerable endpoint
- Deploy intrusion detection systems to alert on privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Ellevo version in administration panel or configuration files. If version is exactly 6.2.0.38160, system is vulnerable.Check Version:
Check Ellevo web interface administration panel or configuration files for version informationVerify Fix Applied:
After applying any vendor patch, verify the /api/usuario/cadastrodesuplente endpoint no longer allows privilege escalation.📡 Detection & Monitoring
Log Indicators:
- Unusual API calls to /api/usuario/cadastrodesuplente
- Multiple privilege escalation attempts
- User permission changes from non-admin accounts
Network Indicators:
- HTTP POST requests to /api/usuario/cadastrodesuplente with privilege escalation parameters
- Unusual traffic patterns to Ellevo API endpoints
SIEM Query:
source="ellevo_logs" AND (uri="/api/usuario/cadastrodesuplente" OR event="privilege_escalation")