CVE-2021-41315
📋 TL;DR
This vulnerability allows authenticated attackers with console access to execute arbitrary operating system commands through improper input sanitization in the SNMP Connectivity utility. It affects Device42 Remote Collector versions before 17.05.01, enabling privilege escalation and remote code execution.
💻 Affected Systems
- Device42 Remote Collector
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root/admin privileges, installing persistent backdoors, and pivoting to other systems in the network.
Likely Case
Unauthorized access to sensitive system data, installation of cryptocurrency miners or ransomware, and lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation and least privilege access controls preventing lateral movement.
🎯 Exploit Status
Exploitation requires authenticated access but command injection vulnerabilities are typically easy to weaponize once discovered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 17.05.01
Vendor Advisory: https://blog.device42.com/2021/09/critical-fixes-in-17-05-01/
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download Device42 Remote Collector version 17.05.01 or later from official sources. 3. Stop the Remote Collector service. 4. Install the updated version. 5. Restart the service. 6. Verify functionality.
🔧 Temporary Workarounds
Disable SNMP Connectivity Utility
allTemporarily disable the vulnerable SNMP Connectivity utility if not required for operations.
# Stop the SNMP service component
# Check Device42 documentation for specific service names
Restrict Console Access
allImplement strict access controls to limit who can access the Remote Collector console.
# Configure firewall rules to restrict access
# Implement IP whitelisting for console access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Remote Collectors from critical systems
- Apply principle of least privilege to console access accounts and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check the Remote Collector version via the web interface or configuration files. Versions before 17.05.01 are vulnerable.Check Version:
# Check version in Device42 web interface or configuration files
# Typically found in /opt/device42/remote_collector/version.txt or similarVerify Fix Applied:
Verify the version is 17.05.01 or later and test SNMP Connectivity utility functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed authentication attempts followed by successful login
- Unexpected process creation from Device42 services
Network Indicators:
- Unusual outbound connections from Remote Collector systems
- SNMP traffic to unexpected destinations
SIEM Query:
source="device42" AND (process="cmd.exe" OR process="bash" OR process="sh") AND user="device42_user"