CVE-2023-53881
📋 TL;DR
CVE-2023-53881 is an unencrypted CWMP communication vulnerability in ReyeeOS that allows attackers to perform man-in-the-middle attacks. Attackers can intercept HTTP polling requests and inject arbitrary commands to achieve remote code execution on Ruijie Reyee Cloud devices. Organizations using affected ReyeeOS versions are vulnerable.
💻 Affected Systems
- Ruijie Reyee Cloud devices running ReyeeOS
📦 What is this software?
Reyee Os by Ruijienetworks
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of Ruijie Reyee Cloud devices allowing attackers to execute arbitrary commands, steal credentials, pivot to internal networks, and establish persistent access.
Likely Case
Attackers intercept device communications, inject malicious commands to modify configurations, disrupt services, or deploy malware on vulnerable devices.
If Mitigated
With proper network segmentation and monitoring, impact is limited to isolated network segments with detection of anomalous CWMP traffic.
🎯 Exploit Status
Exploit requires man-in-the-middle position but no authentication. Public exploit code exists demonstrating command injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for latest ReyeeOS version
Vendor Advisory: https://ruijienetworks.com
Restart Required: Yes
Instructions:
1. Check current ReyeeOS version. 2. Download latest firmware from Ruijie Networks. 3. Backup device configuration. 4. Apply firmware update. 5. Reboot device. 6. Verify update successful.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Reyee devices in separate VLAN with strict firewall rules limiting CWMP traffic
Disable CWMP if not needed
allTurn off CWMP auto-configuration service if not required for device management
configure terminal
no cwmp enable
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Reyee devices from untrusted networks
- Deploy network monitoring to detect anomalous CWMP traffic and man-in-the-middle attempts
🔍 How to Verify
Check if Vulnerable:
Check ReyeeOS version via web interface or CLI: show version. If version is 1.204.1614 or earlier, device is vulnerable.Check Version:
show versionVerify Fix Applied:
Verify ReyeeOS version is updated beyond 1.204.1614 and check CWMP configuration uses secure communication.📡 Detection & Monitoring
Log Indicators:
- Unusual CWMP connection attempts
- Multiple failed authentication attempts to CWMP
- Unexpected configuration changes
Network Indicators:
- Unencrypted HTTP traffic to/from port 7547 (CWMP)
- Anomalous CWMP traffic patterns
- Suspicious source IPs communicating with CWMP
SIEM Query:
source_port:7547 AND protocol:HTTP AND (NOT tls_established:true)