CVE-2024-31967
📋 TL;DR
An improper access control vulnerability in Mitel SIP phones allows unauthenticated attackers to access user information or system configuration. This affects Mitel 6800 Series, 6900 Series, 6900w Series SIP phones, and 6970 Conference Units with specific firmware versions. Attackers can exploit this remotely without credentials.
💻 Affected Systems
- Mitel 6800 Series SIP Phones
- Mitel 6900 Series SIP Phones
- Mitel 6900w Series SIP Phones
- Mitel 6970 Conference Unit
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of phone systems leading to data theft, eavesdropping on calls, or using phones as footholds into corporate networks.
Likely Case
Unauthorized access to sensitive configuration data, user credentials, or call logs that could enable further attacks.
If Mitigated
Limited impact if phones are isolated on separate VLANs with strict network segmentation and access controls.
🎯 Exploit Status
The vulnerability requires no authentication and appears to be straightforward to exploit based on the CVSS score and description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Mitel advisory for specific patched versions
Vendor Advisory: https://www.mitel.com/support/security-advisories/mitel-product-security-advisory-24-0010
Restart Required: Yes
Instructions:
1. Review Mitel Security Advisory 24-0010. 2. Download appropriate firmware updates from Mitel support portal. 3. Apply updates to affected devices following Mitel's upgrade procedures. 4. Reboot devices after firmware update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate VoIP phones on separate VLAN with strict firewall rules limiting access to management interfaces
Access Control Lists
allImplement ACLs to restrict access to phone management interfaces to authorized administrative networks only
🧯 If You Can't Patch
- Segment VoIP network completely from other corporate networks
- Implement strict firewall rules blocking all external access to phone management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via phone web interface or Mitel management console against affected version rangesCheck Version:
Access phone web interface at http://<phone-ip> and check firmware version in System InformationVerify Fix Applied:
Verify firmware version has been updated to patched version and test unauthorized access attempts fail📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to phone web interfaces
- Multiple failed authentication attempts followed by successful access
- Configuration changes from unexpected IP addresses
Network Indicators:
- HTTP/HTTPS traffic to phone management interfaces from unauthorized sources
- Unusual outbound connections from phones
SIEM Query:
source_ip NOT IN authorized_admin_networks AND dest_port IN (80,443,5060,5061) AND dest_ip IN voip_subnet