CVE-2020-26878
📋 TL;DR
CVE-2020-26878 is a remote command injection vulnerability in Ruckus vRIoT software that allows authenticated attackers to execute arbitrary commands as root via the /service/v1/createUser API endpoint. This affects organizations using Ruckus vRIoT versions through 1.5.1.0.21 for IoT device management.
💻 Affected Systems
- Ruckus vRIoT
📦 What is this software?
Ruckus Vriot by Commscope
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with root-level access, allowing attackers to install persistent backdoors, exfiltrate sensitive data, pivot to other network segments, or disrupt IoT device operations.
Likely Case
Unauthorized access to the vRIoT management system leading to IoT device manipulation, credential theft, and potential lateral movement within the network.
If Mitigated
Limited impact if proper network segmentation, API authentication controls, and monitoring are in place to detect and block exploitation attempts.
🎯 Exploit Status
Exploitation requires valid credentials but is straightforward once authenticated. Public proof-of-concept code exists demonstrating command injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 1.5.1.0.21
Vendor Advisory: https://support.ruckuswireless.com/security_bulletins/305
Restart Required: Yes
Instructions:
1. Download the latest patched version from Ruckus support portal. 2. Backup current configuration. 3. Install the update following vendor documentation. 4. Restart the vRIoT service or system.
🔧 Temporary Workarounds
API Endpoint Restriction
linuxBlock or restrict access to the vulnerable /service/v1/createUser endpoint using web application firewall or network controls.
iptables -A INPUT -p tcp --dport [vRIoT-port] -m string --string "/service/v1/createUser" --algo bm -j DROP
Authentication Hardening
allImplement strong authentication policies, multi-factor authentication, and regular credential rotation to reduce risk of credential compromise.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vRIoT systems from critical infrastructure
- Deploy web application firewall with command injection detection rules and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check the installed version of Ruckus vRIoT via web interface or system logs. Versions 1.5.1.0.21 and earlier are vulnerable.Check Version:
Check web interface or system documentation for version information. On Linux systems: grep -i version /opt/ruckus/vriot/logs/*.logVerify Fix Applied:
Verify the version is updated to a release after 1.5.1.0.21 and test that command injection attempts are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual API calls to /service/v1/createUser endpoint
- Suspicious command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login
Network Indicators:
- Unusual outbound connections from vRIoT system
- Traffic patterns indicating command and control communication
- HTTP requests with shell metacharacters in parameters
SIEM Query:
source="vriot.logs" AND (uri_path="/service/v1/createUser" AND (cmd=* OR exec=* OR system=*))🔗 References
- https://adepts.of0x.cc
- https://adepts.of0x.cc/ruckus-vriot-rce/
- https://support.ruckuswireless.com/documents
- https://support.ruckuswireless.com/security_bulletins/305
- https://twitter.com/TheXC3LL
- https://x-c3ll.github.io
- https://adepts.of0x.cc
- https://adepts.of0x.cc/ruckus-vriot-rce/
- https://support.ruckuswireless.com/documents
- https://support.ruckuswireless.com/security_bulletins/305
- https://twitter.com/TheXC3LL
- https://x-c3ll.github.io
