CVE-2020-16279
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on systems running RangeeOS 8.0.4 with the Kommbox component. Attackers can exploit this by sending specially crafted input that gets passed directly to the command line without proper sanitization. Organizations using RangeeOS 8.0.4 with Kommbox enabled are affected.
💻 Affected Systems
- Rangee GmbH RangeeOS
📦 What is this software?
Rangeeos by Rangee
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to install malware, steal sensitive data, pivot to other systems, and maintain persistent access.
Likely Case
Remote code execution leading to data exfiltration, ransomware deployment, or creation of backdoors for future attacks.
If Mitigated
Limited impact through network segmentation, proper input validation, and least privilege principles.
🎯 Exploit Status
The vulnerability is in command injection via untrusted input, making exploitation straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.0.5 or later
Vendor Advisory: https://www.rangee.com/security-advisories
Restart Required: Yes
Instructions:
1. Contact Rangee GmbH for patch availability. 2. Backup system configuration. 3. Apply the official patch. 4. Restart the system. 5. Verify the patch is applied correctly.
🔧 Temporary Workarounds
Disable Kommbox Component
allTemporarily disable the vulnerable Kommbox component if not required for operations.
rangeeos-config disable kommbox
Network Segmentation
allIsolate RangeeOS systems from untrusted networks and internet access.
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to RangeeOS systems
- Deploy application firewalls with command injection detection rules
🔍 How to Verify
Check if Vulnerable:
Check if RangeeOS version is 8.0.4 and Kommbox component is enabled in system configuration.Check Version:
rangeeos-versionVerify Fix Applied:
Verify system version is 8.0.5 or later and test Kommbox functionality with safe input validation.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed Kommbox authentication attempts
- Suspicious process creation from Kommbox service
Network Indicators:
- Unexpected outbound connections from RangeeOS systems
- Traffic to known malicious IPs from Kommbox ports
SIEM Query:
source="rangeeos" AND (process="*cmd*" OR process="*sh*" OR process="*bash*") AND user="kommbox"