CVE-2022-41545
📋 TL;DR
This vulnerability exposes Netgear C7800 router administrative credentials to eavesdropping attacks. Attackers can intercept base64-encoded credentials transmitted via insecure HTTP basic authentication, allowing them to gain administrative access to the router. Users of Netgear C7800 routers with vulnerable firmware are affected.
💻 Affected Systems
- Netgear C7800 Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full administrative control of the router, enabling network traffic interception, DNS hijacking, malware injection, and complete network compromise.
Likely Case
Attacker captures administrative credentials and gains router access, potentially changing settings, monitoring traffic, or launching attacks against internal devices.
If Mitigated
With HTTPS enabled and proper network segmentation, risk is limited to attackers with physical network access or compromised internal devices.
🎯 Exploit Status
Exploitation requires network access and ability to intercept HTTP traffic. Basic authentication credentials are transmitted in every request.
🛠️ 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 router admin interface. 2. Navigate to firmware update section. 3. Check for and install latest firmware. 4. Reboot router after update.
🔧 Temporary Workarounds
Enable HTTPS for Admin Interface
allForce HTTPS for administrative access to encrypt credentials in transit
Change Default Credentials
allUse strong, unique administrative credentials
🧯 If You Can't Patch
- Isolate router management interface to dedicated VLAN
- Implement network segmentation to limit attacker lateral movement
🔍 How to Verify
Check if Vulnerable:
Check if router admin interface uses HTTP basic authentication without HTTPSCheck Version:
Check router admin interface for firmware versionVerify Fix Applied:
Verify HTTPS is enforced for admin interface and firmware version is updated📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts
- Unusual admin interface access from new IPs
Network Indicators:
- HTTP traffic to router admin interface containing Authorization headers
- Unencrypted admin traffic
SIEM Query:
source_ip=router_ip AND http_method=POST AND uri_contains="login" AND NOT protocol="HTTPS"