CVE-2023-39289
📋 TL;DR
This vulnerability in Mitel MiVoice Connect's Connect Mobility Router allows unauthenticated attackers to conduct account enumeration attacks due to improper configuration. Attackers can access system information without authentication. Affects MiVoice Connect versions through 9.6.2208.101.
💻 Affected Systems
- Mitel MiVoice Connect
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker maps all valid user accounts, enabling targeted credential attacks and gaining unauthorized access to sensitive system information.
Likely Case
Attacker enumerates valid user accounts, facilitating credential stuffing or targeted phishing campaigns against identified users.
If Mitigated
With proper network segmentation and access controls, impact limited to information disclosure about account existence.
🎯 Exploit Status
Account enumeration vulnerabilities are typically easy to exploit with simple tools. No public exploit code needed for basic enumeration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version beyond 9.6.2208.101 - check vendor advisory for specific fixed version
Vendor Advisory: https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-23-0011
Restart Required: Yes
Instructions:
1. Download latest MiVoice Connect update from Mitel support portal. 2. Backup current configuration. 3. Apply update following Mitel's upgrade documentation. 4. Restart affected services.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to Connect Mobility Router to trusted IP addresses only
Use firewall rules to limit access to specific source IPs
Disable Unused Component
allDisable Connect Mobility Router if not required for business operations
Follow Mitel documentation to disable Connect Mobility Router component
🧯 If You Can't Patch
- Implement strict network segmentation to isolate MiVoice Connect from untrusted networks
- Enable detailed logging and monitoring for enumeration attempts against the Connect Mobility Router
🔍 How to Verify
Check if Vulnerable:
Check MiVoice Connect version in administration interface. If version is 9.6.2208.101 or earlier, system is vulnerable.Check Version:
Check version in MiVoice Connect web administration interface or use Mitel diagnostic toolsVerify Fix Applied:
Verify version is updated beyond 9.6.2208.101 and test enumeration attempts return consistent responses regardless of account validity.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts with different usernames
- Unusual patterns of requests to Connect Mobility Router endpoints
Network Indicators:
- Unusual traffic patterns to Connect Mobility Router from untrusted sources
- Repeated requests with varying username parameters
SIEM Query:
source="mivoice-connect" AND (event_type="authentication" OR uri="*/mobility*") AND status="failed" | stats count by src_ip, username