CVE-2021-3460
📋 TL;DR
Motorola MH702x devices before version 2.0.0.301 fail to properly validate SSL/TLS server certificates when communicating with the support server. This allows attackers to perform man-in-the-middle attacks and intercept or manipulate communications. Only users of affected Motorola MH702x devices are impacted.
💻 Affected Systems
- Motorola MH702x devices
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could intercept all communications between the device and Motorola's support server, potentially stealing sensitive data, injecting malicious commands, or impersonating legitimate servers.
Likely Case
In a targeted attack, an attacker could intercept firmware updates or diagnostic data, potentially gaining control over the device or accessing sensitive information.
If Mitigated
With proper network segmentation and monitoring, the impact is limited to potential data leakage from the specific device's support communications.
🎯 Exploit Status
Exploitation requires network access to intercept communications between the device and support server. No authentication is needed to exploit the certificate validation flaw.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.0.301
Vendor Advisory: https://motorolamentor.zendesk.com/hc/en-us/articles/1260804087249
Restart Required: Yes
Instructions:
1. Access device management interface. 2. Check current firmware version. 3. If below 2.0.0.301, download and apply firmware update 2.0.0.301 from Motorola's official support portal. 4. Reboot device after update completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks to prevent man-in-the-middle attacks.
Disable Support Server Communication
allIf possible, disable automatic communication with Motorola's support server in device settings.
🧯 If You Can't Patch
- Segment affected devices on isolated network segments with strict egress filtering
- Monitor network traffic for unusual SSL/TLS certificate patterns or unexpected connections to support servers
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If version is below 2.0.0.301, device is vulnerable.Check Version:
Check via device web interface at Settings > About > Firmware VersionVerify Fix Applied:
After updating, verify firmware version shows 2.0.0.301 or higher in device settings.📡 Detection & Monitoring
Log Indicators:
- Failed SSL/TLS handshake attempts
- Unexpected certificate validation errors
- Unusual support server communication patterns
Network Indicators:
- Man-in-the-middle attack patterns
- SSL/TLS interception attempts between device and support.motorola.com
- Unexpected certificate authorities in SSL/TLS connections
SIEM Query:
source="network_traffic" dest_ip="support.motorola.com" ssl_validation="failed" OR cert_validation="bypassed"