CVE-2019-20730
📋 TL;DR
This CVE describes a SQL injection vulnerability affecting multiple NETGEAR router, gateway, and extender models. Attackers can execute arbitrary SQL commands through unvalidated input, potentially compromising device security. Users with affected devices running vulnerable firmware versions are at risk.
💻 Affected Systems
- NETGEAR D3600
- D6000
- D6200
- D6220
- D6400
- D7000
- D7000v2
- D7800
- D8500
- DC112A
- EX8000
- JR6150
- R6050
- R6220
- R6250
- R6300v2
- R6400
- R6400v2
- R6700
- R6700v2
- R6800
- R6900v2
- R6900
- R7000
- R6900P
- R7000P
- R7100LG
- R7300DST
- R7500
- R7500v2
- R7800
- R7900
- R8000
- R7900P
- R8000P
- R8300
- R8500
- R8900
- R9000
- WNDR3700v4
- WNDR3700v5
- WNDR4300v1
- WNDR4300v2
- WNDR4500v3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to extract credentials, modify configurations, execute arbitrary code, and pivot to internal networks.
Likely Case
Unauthorized access to device administration, credential theft, and configuration manipulation leading to network compromise.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and strong authentication controls.
🎯 Exploit Status
SQL injection vulnerabilities are well-understood and often have public exploits. The CVSS 9.8 score indicates trivial exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Varies by model (e.g., D3600 1.0.0.68+, D6000 1.0.0.68+, etc.)
Vendor Advisory: https://kb.netgear.com/000061197/Security-Advisory-for-SQL-Injection-on-Some-Routers-Gateways-and-Extenders-PSV-2017-3056
Restart Required: Yes
Instructions:
1. Identify your NETGEAR model number. 2. Visit NETGEAR support site. 3. Download latest firmware for your model. 4. Log into router admin interface. 5. Navigate to Advanced > Administration > Firmware Update. 6. Upload and install the firmware file. 7. Wait for router to reboot.
🔧 Temporary Workarounds
Disable Remote Management
allPrevents external attackers from accessing the vulnerable interface
Network Segmentation
allPlace router on isolated network segment to limit attack surface
🧯 If You Can't Patch
- Replace affected device with supported model
- Implement network firewall rules to restrict access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under Advanced > Administration > Firmware UpdateCheck Version:
No CLI command - check via web interface at http://routerlogin.net or http://192.168.1.1Verify Fix Applied:
Confirm firmware version matches or exceeds the patched version for your specific model📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in router logs
- Multiple failed login attempts followed by successful access
- Unexpected configuration changes
Network Indicators:
- Unusual outbound connections from router
- SQL query patterns in HTTP requests to router management interface
SIEM Query:
source="router_logs" AND ("sql" OR "injection" OR "syntax error")