CVE-2017-7318
📋 TL;DR
Siklu EtherHaul devices contain an unauthenticated remote command execution vulnerability that allows attackers to execute arbitrary commands and retrieve sensitive information like usernames and plaintext passwords. This affects all Siklu EtherHaul devices running firmware versions before 7.4.0. Organizations using these wireless backhaul devices for network connectivity are at risk.
💻 Affected Systems
- Siklu EtherHaul devices
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the device allowing attackers to reconfigure network settings, intercept traffic, pivot to internal networks, and permanently disable connectivity.
Likely Case
Attackers gain administrative access to the device, steal credentials, and potentially use the device as a foothold for further network attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict network segmentation and access controls.
🎯 Exploit Status
Exploit requires no authentication and has been publicly documented with proof-of-concept details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.4.0 or later
Vendor Advisory: https://www.siklu.com/support/security-advisories/
Restart Required: Yes
Instructions:
1. Download firmware version 7.4.0 or later from Siklu support portal. 2. Backup current configuration. 3. Upload new firmware via web interface or CLI. 4. Reboot device. 5. Verify firmware version after reboot.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EtherHaul devices from untrusted networks using firewalls and VLANs
Access Control Lists
allRestrict management interface access to trusted IP addresses only
access-list 10 permit 192.168.1.0 0.0.0.255
access-list 10 deny any
🧯 If You Can't Patch
- Immediately isolate affected devices from internet and untrusted networks
- Implement strict network segmentation and monitor all traffic to/from EtherHaul devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > About) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is 7.4.0 or higher using 'show version' command📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to management interface
- Unusual command execution in system logs
- Configuration changes from unknown sources
Network Indicators:
- Unexpected outbound connections from EtherHaul devices
- Traffic patterns inconsistent with normal operation
- Port scanning originating from device
SIEM Query:
source="etherhaul" AND (event_type="command_execution" OR auth_failure OR config_change)