CVE-2024-30571
📋 TL;DR
This vulnerability allows unauthenticated attackers to access sensitive information from Netgear R6850 routers via the BRS_top.html component. It affects Netgear R6850 routers running firmware version 1.1.0.88. The information leak could expose router configuration details or other sensitive data.
💻 Affected Systems
- Netgear R6850
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers obtain router credentials, configuration secrets, or network topology information leading to full network compromise.
Likely Case
Attackers gather information about the router's configuration, network settings, or connected devices for reconnaissance purposes.
If Mitigated
Information exposure limited to non-critical data if proper network segmentation and access controls are implemented.
🎯 Exploit Status
Exploitation requires only HTTP access to the vulnerable component with no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: Yes
Instructions:
1. Check Netgear security advisory for updates. 2. If patch available, download from Netgear support site. 3. Upload firmware via router admin interface. 4. Reboot router after update.
🔧 Temporary Workarounds
Disable WAN access to admin interface
allPrevent external access to router management interface
Router-specific: Disable 'Remote Management' in admin settings
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected router with updated model
- Implement strict firewall rules blocking all external access to router management interface
🔍 How to Verify
Check if Vulnerable:
Access http://[router-ip]/BRS_top.html without authentication; if it returns sensitive information, device is vulnerable.Check Version:
Check router admin interface under 'Firmware Version' or similar sectionVerify Fix Applied:
After patching, attempt to access BRS_top.html without authentication; should return error or no sensitive data.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /BRS_top.html from unauthorized IPs
- Unusual access patterns to router management interface
Network Indicators:
- External IPs accessing router management ports (typically 80/443)
- Traffic to /BRS_top.html path
SIEM Query:
source_ip NOT IN trusted_networks AND dest_port IN (80,443) AND url_path CONTAINS 'BRS_top.html'🔗 References
- https://github.com/funny-mud-peee/IoT-vuls/blob/main/netgear%20R6850/Info%20Leak%20in%20Netgear-R6850%EF%BC%88BRS_top.html%EF%BC%89.md
- https://www.netgear.com/about/security/
- https://github.com/funny-mud-peee/IoT-vuls/blob/main/netgear%20R6850/Info%20Leak%20in%20Netgear-R6850%EF%BC%88BRS_top.html%EF%BC%89.md
- https://www.netgear.com/about/security/
