CVE-2024-23910
📋 TL;DR
A cross-site request forgery (CSRF) vulnerability in ELECOM wireless LAN routers and repeaters allows remote unauthenticated attackers to trick administrators into performing unintended actions. This affects administrators of the listed ELECOM devices, potentially compromising router configuration and network security.
💻 Affected Systems
- ELECOM wireless LAN routers
- ELECOM wireless LAN repeaters
- WMC-X1800GST-B
- WSC-X1800GS-B
- e-Mesh Starter Kit WMC-2LX-B
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full administrative control of the router, enabling network traffic interception, DNS hijacking, firmware modification, or disabling security features.
Likely Case
Attacker modifies router settings (e.g., DNS, firewall rules, admin credentials) to redirect traffic, steal data, or create backdoors.
If Mitigated
Limited impact if CSRF protections are implemented or administrative sessions are properly managed.
🎯 Exploit Status
CSRF attacks typically require social engineering (e.g., phishing) to lure administrator to malicious site; no authentication needed to trigger exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific firmware versions.
Vendor Advisory: https://www.elecom.co.jp/news/security/20240220-01/
Restart Required: Yes
Instructions:
1. Visit ELECOM support website. 2. Download latest firmware for your device model. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Enable CSRF Protection
allImplement anti-CSRF tokens in web forms if supported by device firmware.
Restrict Admin Access
allLimit administrative interface access to trusted IP addresses or VLANs only.
🧯 If You Can't Patch
- Disable remote administration and only access admin interface from trusted internal network.
- Use browser extensions that block CSRF attempts and enforce same-origin policies.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against patched versions in vendor advisory; if unpatched and web admin is accessible, assume vulnerable.Check Version:
Log into router web interface and navigate to system info or firmware status page.Verify Fix Applied:
Confirm firmware version matches or exceeds patched version listed in vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected configuration changes in router logs
- Admin login from unusual IP addresses
Network Indicators:
- Suspicious HTTP POST requests to admin endpoints from external sources
SIEM Query:
Search for web requests to router admin paths (e.g., /cgi-bin/*) from non-trusted IPs.