CVE-2018-17240
📋 TL;DR
CVE-2018-17240 is a memory dump vulnerability in Netwave IP camera devices that allows unauthenticated attackers to access the /proc/kcore file, exposing sensitive network configuration data including usernames and passwords. This affects Netwave IP camera devices with vulnerable firmware versions. Attackers can exploit this remotely without authentication.
💻 Affected Systems
- Netwave IP Camera
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full administrative credentials, compromise the camera feed, pivot to internal networks, and use the device as a foothold for further attacks.
Likely Case
Attackers exfiltrate camera credentials, hijack the video feed, and potentially disable security monitoring.
If Mitigated
With proper network segmentation and access controls, impact is limited to the isolated camera network.
🎯 Exploit Status
Public exploit scripts available on GitHub demonstrate simple HTTP requests to access /proc/kcore and extract credentials from memory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific version unknown - check with Netwave vendor
Vendor Advisory: No public vendor advisory found
Restart Required: Yes
Instructions:
1. Contact Netwave for firmware updates. 2. Download latest firmware. 3. Upload via camera web interface. 4. Reboot camera. 5. Verify /proc/kcore is no longer accessible.
🔧 Temporary Workarounds
Block /proc/kcore Access
linuxConfigure web server or firewall to block access to /proc/kcore path
iptables -A INPUT -p tcp --dport 80 -m string --string "/proc/kcore" --algo bm -j DROP
Network Segmentation
allIsolate cameras on separate VLAN with strict firewall rules
🧯 If You Can't Patch
- Remove cameras from internet-facing networks immediately
- Implement strict network ACLs allowing only necessary traffic to/from cameras
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://[camera-ip]//proc/kcore. If it returns data (not 404), device is vulnerable.Check Version:
Check firmware version via camera web interface at http://[camera-ip]/ or via serial consoleVerify Fix Applied:
Attempt same access after patching - should return 404 or access denied.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /proc/kcore in web server logs
- Unusual memory access patterns
Network Indicators:
- HTTP GET requests to /proc/kcore from untrusted sources
- Large data exfiltration from camera
SIEM Query:
source="camera_web_logs" AND url="/proc/kcore"