CVE-2024-3780
📋 TL;DR
A local information exposure vulnerability in Technicolor CGA2121 routers allows attackers with physical or network access to extract sensitive WiFi credentials. This affects version 1.01 of the CGA2121 router firmware. Attackers can obtain SSIDs and passwords, potentially compromising network security.
💻 Affected Systems
- Technicolor CGA2121
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete network compromise where attackers gain persistent access, intercept all traffic, and use the network as a launchpad for further attacks.
Likely Case
Local attacker extracts WiFi credentials and gains unauthorized network access, potentially monitoring traffic or accessing connected devices.
If Mitigated
Limited to information disclosure without network access if strong perimeter controls and monitoring are in place.
🎯 Exploit Status
Exploitation requires local access but no authentication. Specific exploit details not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/information-exposure-vulnerability-technicolor-cga2121
Restart Required: No
Instructions:
1. Check Technicolor/ISP for firmware updates. 2. If update available, download and apply through router admin interface. 3. Verify version is no longer 1.01.
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface from general network access
Physical Security Controls
allRestrict physical access to router and network equipment
🧯 If You Can't Patch
- Replace affected router with updated model or different vendor
- Implement network monitoring for unauthorized access attempts and credential extraction patterns
🔍 How to Verify
Check if Vulnerable:
Access router admin interface and check firmware version. If version is 1.01, device is vulnerable.Check Version:
Check router web interface at 192.168.0.1 or 192.168.1.1, navigate to System/Status or similar sectionVerify Fix Applied:
Confirm firmware version is no longer 1.01 after update. Test local access attempts to verify information is no longer exposed.📡 Detection & Monitoring
Log Indicators:
- Unusual local access attempts to router management interface
- Multiple failed authentication attempts followed by information queries
Network Indicators:
- Unusual traffic patterns from router to unknown external IPs
- ARP spoofing or MAC address anomalies
SIEM Query:
source_ip=router_ip AND (event_type="configuration_access" OR event_type="information_query")