CVE-2023-49007
📋 TL;DR
A stack-based buffer overflow vulnerability exists in the httpd service of Netgear Orbi RBR750 routers running firmware versions before V7.2.6.21. This vulnerability allows remote attackers to execute arbitrary code with root privileges, potentially taking full control of affected devices. All users of Netgear Orbi RBR750 routers with vulnerable firmware are affected.
💻 Affected Systems
- Netgear Orbi RBR750
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, credential theft, network traffic interception, and use as pivot point for attacking internal networks.
Likely Case
Remote code execution resulting in device takeover, malware deployment, and participation in botnets.
If Mitigated
Limited impact if device is behind firewall with restricted inbound access and network segmentation.
🎯 Exploit Status
Public proof-of-concept code is available on GitHub, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V7.2.6.21
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: Yes
Instructions:
1. Log into Orbi web interface. 2. Navigate to Advanced > Administration > Firmware Update. 3. Check for updates and install V7.2.6.21. 4. Reboot the router after update completes.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to Orbi web interface using firewall rules
Disable Remote Management
allTurn off remote management features to limit attack surface
🧯 If You Can't Patch
- Isolate Orbi router on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious traffic to/from Orbi device
🔍 How to Verify
Check if Vulnerable:
Check firmware version in Orbi web interface under Advanced > Administration > Firmware UpdateCheck Version:
Not applicable - check via web interface onlyVerify Fix Applied:
Confirm firmware version shows V7.2.6.21 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to /usr/sbin/httpd
- Process crashes of httpd service
- Unexpected root privilege escalation
Network Indicators:
- Unusual outbound connections from Orbi device
- Suspicious HTTP traffic to router management interface
SIEM Query:
source="orbi-router" AND (event="httpd_crash" OR http_request CONTAINS "overflow" OR process="httpd" AND privilege="root")