CVE-2024-37569
📋 TL;DR
This CVE describes a command injection vulnerability in Mitel 6869i devices that allows authenticated attackers to execute arbitrary shell commands with root privileges. The vulnerability exists in the provis.html endpoint which fails to sanitize the hostname parameter, leading to remote code execution during device boot. Affected organizations using vulnerable Mitel phone systems are at risk.
💻 Affected Systems
- Mitel 6869i
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the phone system allowing attackers to establish persistence, pivot to other network devices, exfiltrate sensitive data, or disrupt telephony services.
Likely Case
Attackers gain root access to phone devices, potentially installing backdoors, intercepting calls, or using devices as footholds for lateral movement.
If Mitigated
Limited impact with proper network segmentation and authentication controls preventing unauthorized access to the vulnerable endpoint.
🎯 Exploit Status
Multiple public exploit scripts and demonstration videos are available. Exploitation requires authentication but is straightforward once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: Not provided in references
Instructions:
Check Mitel security advisories for firmware updates. Upgrade to versions beyond 4.5.0.41 and 5.0.0.1018 if available.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to phone web interfaces and provisioning endpoints using firewall rules and network segmentation.
Authentication Hardening
allImplement strong authentication mechanisms and change default credentials on all phone devices.
🧯 If You Can't Patch
- Isolate Mitel phones on separate VLANs with strict firewall rules preventing external and lateral access
- Implement network monitoring for unusual traffic patterns from phone devices and block access to provis.html endpoint
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or console. If version is 4.5.0.41 or earlier, or 5.x up to 5.0.0.1018, device is vulnerable.Check Version:
Check via web interface at http://<phone-ip>/ or via console connectionVerify Fix Applied:
Verify firmware version is updated beyond vulnerable versions and test that provis.html endpoint properly sanitizes hostname input.📡 Detection & Monitoring
Log Indicators:
- Unusual shell command execution in system logs
- Multiple failed authentication attempts followed by successful access to provis.html
- Changes to hostname configuration with shell metacharacters
Network Indicators:
- HTTP POST requests to provis.html containing shell metacharacters in parameters
- Unusual outbound connections from phone devices
SIEM Query:
source="phone-logs" AND (uri="/provis.html" AND (param="hostname" AND value MATCHES "[;&|`$()]"))🔗 References
- https://github.com/kwburns/CVE/blob/main/Mitel/5.0.0.1018/code/exploit-provis.py
- https://github.com/kwburns/CVE/tree/main/Mitel/5.0.0.1018#authenticated-remote-command-execution-provis
- https://www.youtube.com/watch?v=I9TQqfP5qzM
- https://github.com/kwburns/CVE/blob/main/Mitel/5.0.0.1018/code/exploit-provis.py
- https://github.com/kwburns/CVE/tree/main/Mitel/5.0.0.1018#authenticated-remote-command-execution-provis
- https://www.youtube.com/watch?v=I9TQqfP5qzM
