CVE-2020-7983
📋 TL;DR
CVE-2020-7983 is a Cross-Site Request Forgery (CSRF) vulnerability in the login.asp page of Ruckus R500 access points running firmware version 3.4.2.0.384. This allows attackers to trick authenticated users into performing unauthorized actions, potentially gaining access to the administrative panel or conducting Server-Side Request Forgery (SSRF) attacks. Organizations using affected Ruckus R500 devices are at risk.
💻 Affected Systems
- Ruckus R500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to the device, reconfigure network settings, intercept traffic, or use SSRF to attack internal systems behind the firewall.
Likely Case
Unauthorized access to the administrative panel leading to network configuration changes, denial of service, or credential theft.
If Mitigated
Limited impact if CSRF protections are implemented or administrative access is restricted to trusted networks.
🎯 Exploit Status
Exploitation requires tricking an authenticated user into visiting a malicious webpage; proof-of-concept code is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Ruckus advisory for updated firmware
Vendor Advisory: https://support.ruckuswireless.com/security_bulletins/305
Restart Required: Yes
Instructions:
1. Check current firmware version. 2. Download and apply the latest firmware from Ruckus support. 3. Reboot the device after update.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd anti-CSRF tokens to login.asp and other sensitive forms if custom modifications are possible.
Restrict Administrative Access
allLimit administrative panel access to trusted IP addresses or VLANs using network firewall rules.
🧯 If You Can't Patch
- Isolate affected devices on a separate network segment with strict access controls.
- Monitor for unauthorized configuration changes and implement multi-factor authentication if supported.
🔍 How to Verify
Check if Vulnerable:
Check the firmware version via the web interface or CLI; if it is 3.4.2.0.384, the device is vulnerable.Check Version:
ssh admin@device-ip 'show version' or check via web interfaceVerify Fix Applied:
After updating, confirm the firmware version has changed from 3.4.2.0.384 and test CSRF protections.📡 Detection & Monitoring
Log Indicators:
- Unusual login attempts from unexpected IPs
- Configuration changes without authorized user sessions
Network Indicators:
- HTTP POST requests to login.asp with unexpected referrers or lack of CSRF tokens
SIEM Query:
source="ruckus" AND (uri="/login.asp" OR event="configuration change")