CVE-2023-24049
📋 TL;DR
CVE-2023-24049 is a privilege escalation vulnerability in Connectize AC21000 G6 routers due to poor credential management. Attackers can exploit this to gain administrative access to the router. This affects users of Connectize AC21000 G6 routers with firmware version 641.139.1.1256.
💻 Affected Systems
- Connectize AC21000 G6 Dual-Band Gigabit WiFi Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full router compromise allowing attackers to intercept all network traffic, modify DNS settings, install malware, and pivot to internal network devices.
Likely Case
Router takeover enabling network traffic monitoring, credential theft, and device configuration changes.
If Mitigated
Limited impact if strong network segmentation and monitoring are in place, though router control would still be lost.
🎯 Exploit Status
Exploitation requires initial access to router management interface but leverages weak credential management for privilege escalation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with Connectize for updated firmware
Restart Required: Yes
Instructions:
1. Check Connectize website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Change Default Credentials
allChange all default passwords and use strong, unique credentials for router administration.
Restrict Admin Access
allLimit router admin interface access to specific IP addresses or disable remote administration.
🧯 If You Can't Patch
- Replace vulnerable router with a different model from a vendor with better security practices
- Implement network segmentation to isolate the router from critical internal systems
🔍 How to Verify
Check if Vulnerable:
Access router admin interface and check firmware version in system settings.Check Version:
Check router web interface or use nmap/router scanning tools to identify firmware versionVerify Fix Applied:
Verify firmware version has been updated to a version later than 641.139.1.1256.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful admin login
- Unusual configuration changes in router logs
- Administrative access from unexpected IP addresses
Network Indicators:
- DNS settings changed unexpectedly
- New port forwarding rules added
- Unusual outbound traffic from router
SIEM Query:
source="router_logs" AND (event="admin_login" OR event="config_change") | stats count by src_ip🔗 References
- https://research.nccgroup.com/2023/10/19/technical-advisory-multiple-vulnerabilities-in-connectize-g6-ac2100-dual-band-gigabit-wifi-router-cve-2023-24046-cve-2023-24047-cve-2023-24048-cve-2023-24049-cve-2023-24050-cve-2023-24051-cve/
- https://research.nccgroup.com/2023/10/19/technical-advisory-multiple-vulnerabilities-in-connectize-g6-ac2100-dual-band-gigabit-wifi-router-cve-2023-24046-cve-2023-24047-cve-2023-24048-cve-2023-24049-cve-2023-24050-cve-2023-24051-cve/
