CVE-2019-19842
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on Ruckus Wireless Unleashed access points by sending a specially crafted POST request to a vulnerable administrative endpoint. Attackers can gain full control of affected devices without authentication. All systems running vulnerable versions of Ruckus Wireless Unleashed firmware are affected.
💻 Affected Systems
- Ruckus Wireless Unleashed
📦 What is this software?
Unleashed by Ruckuswireless
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the access point allowing attackers to install persistent backdoors, pivot to internal networks, intercept/modify network traffic, or use the device as a foothold for further attacks.
Likely Case
Attackers gain remote code execution on the access point, potentially disrupting network services, stealing credentials, or using the device for malicious activities.
If Mitigated
If network segmentation and access controls are properly implemented, impact may be limited to the compromised device only.
🎯 Exploit Status
Exploitation is trivial with publicly available proof-of-concept code. The vulnerability requires no authentication and has simple HTTP POST request structure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 200.7.10.102.64
Vendor Advisory: https://www.ruckuswireless.com/security/299/view/txt
Restart Required: Yes
Instructions:
1. Log into the Ruckus Unleashed web interface. 2. Navigate to Administration > Software Upgrade. 3. Upload and install the latest firmware version. 4. Reboot the access point after installation completes.
🔧 Temporary Workarounds
Block access to vulnerable endpoint
linuxUse network firewall rules to block access to /admin/_cmdstat.jsp endpoint
iptables -A INPUT -p tcp --dport 80 -m string --string "/admin/_cmdstat.jsp" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/admin/_cmdstat.jsp" --algo bm -j DROP
🧯 If You Can't Patch
- Segment affected access points on isolated VLANs with strict firewall rules
- Implement network-based intrusion detection to monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at Administration > Software Upgrade or via SSH with 'cat /etc/ruckus-release'Check Version:
ssh admin@ruckus-ap "cat /etc/ruckus-release"Verify Fix Applied:
Verify firmware version is greater than 200.7.10.102.64 and test that POST requests to /admin/_cmdstat.jsp with xcmd=spectra-analysis parameter no longer execute commands📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /admin/_cmdstat.jsp containing 'xcmd=spectra-analysis' and 'mac=' parameters with shell metacharacters
- Unusual command execution in system logs
Network Indicators:
- HTTP POST requests to vulnerable endpoint with command injection patterns
- Unusual outbound connections from access points
SIEM Query:
source="ruckus-ap" AND (url="/admin/_cmdstat.jsp" AND method="POST" AND (param="xcmd=spectra-analysis" OR param="mac=*;*" OR param="mac=*|*" OR param="mac=*`*"))🔗 References
- https://alephsecurity.com/2020/01/14/ruckus-wireless
- https://fahrplan.events.ccc.de/congress/2019/Fahrplan/events/10816.html
- https://www.ruckuswireless.com/security/299/view/txt
- https://alephsecurity.com/2020/01/14/ruckus-wireless
- https://fahrplan.events.ccc.de/congress/2019/Fahrplan/events/10816.html
- https://www.ruckuswireless.com/security/299/view/txt
