CVE-2018-15353
📋 TL;DR
A buffer overflow vulnerability in the web interface of Kraftway 24F2XG Router firmware allows remote attackers to execute arbitrary code on affected devices. This affects organizations using this specific router model with vulnerable firmware. The high CVSS score indicates critical severity requiring immediate attention.
💻 Affected Systems
- Kraftway 24F2XG Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with attacker gaining full control, enabling network traffic interception, lateral movement to internal systems, and persistent backdoor installation.
Likely Case
Router compromise leading to network disruption, credential theft, and potential access to connected internal systems.
If Mitigated
Limited impact if router is behind firewall with restricted web interface access, though risk remains if internal attacker exists.
🎯 Exploit Status
Buffer overflow via web interface suggests relatively straightforward exploitation once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found in provided references
Restart Required: Yes
Instructions:
1. Check Kraftway vendor website for firmware updates
2. If update available, download and apply following vendor instructions
3. Reboot router after update
4. Verify firmware version is no longer 3.5.30.1118
🔧 Temporary Workarounds
Disable Web Interface Access
allBlock external access to router web management interface
Configure firewall to block port 80/443 to router management IP
Disable WAN-side management if enabled
Network Segmentation
allIsolate router from critical internal networks
Create separate VLAN for router management
Implement strict firewall rules between router and internal networks
🧯 If You Can't Patch
- Replace router with supported model
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Access router web interface, navigate to system information page, check firmware version matches 3.5.30.1118Check Version:
Check via web interface or SSH: show version (vendor-specific command may vary)Verify Fix Applied:
Verify firmware version has changed from 3.5.30.1118 after update📡 Detection & Monitoring
Log Indicators:
- Unusual web interface access patterns
- Buffer overflow strings in web logs
- Unexpected configuration changes
Network Indicators:
- Unusual traffic from router to external IPs
- Exploit pattern detection in web traffic
SIEM Query:
source="router_logs" AND (firmware="3.5.30.1118" OR buffer_overflow OR web_interface_anomaly)