CVE-2020-25206
📋 TL;DR
This vulnerability allows authenticated attackers to execute arbitrary operating system commands on Mimosa wireless devices through command injection in specific API endpoints. Attackers with web console access can send crafted POST requests to achieve complete device takeover. Affected devices include Mimosa B5, B5c, and C5x with firmware up to version 2.8.0.2.
💻 Affected Systems
- Mimosa B5
- Mimosa B5c
- Mimosa C5x
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to network infiltration, data exfiltration, or use as pivot point for lateral movement.
Likely Case
Unauthorized command execution leading to device configuration changes, service disruption, or credential theft.
If Mitigated
Limited impact if proper network segmentation and access controls prevent attacker access to web console.
🎯 Exploit Status
Exploitation requires authenticated access but uses simple command injection techniques. Public advisories include technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware versions after 2.8.0.2
Vendor Advisory: https://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/
Restart Required: Yes
Instructions:
1. Download latest firmware from Mimosa support portal. 2. Backup current configuration. 3. Upload and apply firmware update through web interface. 4. Verify successful update and restore configuration if needed.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict access to web console management interface to trusted IP addresses only.
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
API Endpoint Blocking
allBlock access to vulnerable API endpoints using web server configuration or firewall rules.
location ~ ^/core/api/calls/(Throughput|WANStats|PhyStats|QosStats)\.php$ { deny all; }
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices from critical networks
- Enforce strong authentication policies and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in web console under System > Status. If version is 2.8.0.2 or earlier, device is vulnerable.Check Version:
curl -k -u 'admin:password' https://device-ip/api/status | grep versionVerify Fix Applied:
Verify firmware version is greater than 2.8.0.2. Test API endpoints with safe commands to confirm injection is prevented.📡 Detection & Monitoring
Log Indicators:
- POST requests to vulnerable endpoints with shell metacharacters
- Unusual command execution patterns in system logs
Network Indicators:
- HTTP POST requests to /core/api/calls/*.php with command injection payloads
- Outbound connections from device to unexpected destinations
SIEM Query:
source="web_logs" AND (uri="/core/api/calls/Throughput.php" OR uri="/core/api/calls/WANStats.php" OR uri="/core/api/calls/PhyStats.php" OR uri="/core/api/calls/QosStats.php") AND method="POST" AND (body CONTAINS "|" OR body CONTAINS ";" OR body CONTAINS "`" OR body CONTAINS "$")🔗 References
- https://cwe.mitre.org/data/definitions/78.html
- https://labs.f-secure.com/advisories/
- https://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/
- https://cwe.mitre.org/data/definitions/78.html
- https://labs.f-secure.com/advisories/
- https://labs.f-secure.com/advisories/mimosa-ptp-devices-multiple-vulnerabilities/
