CVE-2024-47547
📋 TL;DR
Ruijie Reyee OS versions 2.206.x through 2.319.x contain a weak password change mechanism that allows attackers to brute force authentication. This vulnerability affects all users of affected Ruijie network devices running vulnerable firmware versions.
💻 Affected Systems
- Ruijie Reyee OS
📦 What is this software?
Reyee Os by Ruijienetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through unauthorized administrative access, enabling network takeover, data exfiltration, and lateral movement.
Likely Case
Unauthorized access to network devices leading to configuration changes, service disruption, and credential harvesting.
If Mitigated
Limited impact with strong network segmentation, monitoring, and authentication controls in place.
🎯 Exploit Status
Exploitation requires network access to the device's management interface. The weak mechanism makes brute force attacks feasible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.320.x or later
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-338-01
Restart Required: Yes
Instructions:
1. Download firmware version 2.320.x or later from Ruijie support portal. 2. Backup current configuration. 3. Upload and install new firmware via web interface or CLI. 4. Reboot device. 5. Verify firmware version.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to management interfaces to trusted IP addresses only.
# Configure ACL to restrict management access
# Example: ip access-list standard MGMT-ACL
# permit 192.168.1.0 0.0.0.255
# deny any
Rate Limiting
allImplement rate limiting on authentication attempts to mitigate brute force attacks.
# Configure login attempt limits
# Example: login block-for 300 attempts 3 within 60
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach management interfaces
- Enable comprehensive logging and monitoring for authentication attempts and failed logins
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > System Info) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is 2.320.x or later using same methods📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from single source
- Successful logins from unusual IP addresses
- Password change requests from unauthorized users
Network Indicators:
- High volume of authentication requests to management interface
- Traffic patterns consistent with brute force tools
SIEM Query:
source="ruijie_logs" (event_type="authentication_failure" count>10 within 5min) OR (event_type="password_change" from_ip not in trusted_ips)