CVE-2024-50999
📋 TL;DR
This CVE describes a command injection vulnerability in Netgear R8500 routers where attackers can execute arbitrary operating system commands by sending specially crafted requests to the password.cgi endpoint. This affects Netgear R8500 router users with the vulnerable firmware version, potentially allowing attackers to take control of the device.
💻 Affected Systems
- Netgear R8500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to intercept all network traffic, install persistent malware, pivot to internal networks, or use the device for botnet activities.
Likely Case
Router compromise leading to network traffic interception, DNS hijacking, credential theft, and potential lateral movement to connected devices.
If Mitigated
Limited impact if the router is behind a firewall with restricted WAN access and strong network segmentation.
🎯 Exploit Status
Exploitation requires access to the web interface, which typically requires authentication. However, if default credentials are used or other vulnerabilities exist, this could be chained for unauthenticated access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Netgear security advisory for latest patched version
Vendor Advisory: https://www.netgear.com/about/security/
Restart Required: Yes
Instructions:
1. Log into Netgear router web interface. 2. Navigate to Advanced > Administration > Firmware Update. 3. Check for updates and apply latest firmware. 4. Reboot router after update completes.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Navigate to Advanced > Administration > Remote Management and disable
Change Default Credentials
allUse strong, unique credentials for router admin access
Navigate to Advanced > Administration > Set Password and change credentials
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for suspicious traffic to/from router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under Advanced > Administration > Firmware UpdateCheck Version:
Check via web interface or SSH if enabled: cat /etc/versionVerify Fix Applied:
Verify firmware version is newer than v1.0.2.160 after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to password.cgi with shell metacharacters
- Failed authentication attempts followed by successful password change
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains from router
SIEM Query:
source="router_logs" AND (uri="/password.cgi" AND (data CONTAINS "|" OR data CONTAINS ";" OR data CONTAINS "`"))