CVE-2025-41673
📋 TL;DR
This vulnerability allows authenticated high-privileged remote attackers to execute arbitrary operating system commands via POST requests to the send_sms action. The flaw exists due to improper input sanitization in command execution functions. Systems running vulnerable versions of the affected software with exposed web interfaces are at risk.
💻 Affected Systems
- Unknown software with SMS functionality
📦 What is this software?
Mbnet.mini Firmware by Mbconnectline
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, lateral movement across networks, and persistent backdoor installation.
Likely Case
Attacker gains shell access to the server, exfiltrates sensitive data, and potentially compromises other systems on the same network.
If Mitigated
Attack fails due to proper network segmentation, input validation, or privilege restrictions, resulting in no impact.
🎯 Exploit Status
Exploitation requires authenticated high-privilege access and knowledge of vulnerable endpoint
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://certvde.com/de/advisories/VDE-2025-058
Restart Required: No
Instructions:
1. Monitor vendor website for security updates 2. Apply patch when available 3. Test in non-production environment first
🔧 Temporary Workarounds
Disable send_sms endpoint
allTemporarily disable or block access to the vulnerable send_sms action
# Configuration depends on specific software/web server
Implement input validation
allAdd strict input validation and sanitization for all parameters passed to send_sms
# Implementation depends on programming language/framework
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the vulnerable endpoint
- Apply principle of least privilege - ensure only absolutely necessary users have high privileges
🔍 How to Verify
Check if Vulnerable:
Check if software version matches affected range from vendor advisory and test for command injection in send_sms parametersCheck Version:
# Check software version - command varies by specific productVerify Fix Applied:
Test that command injection attempts no longer succeed and verify software version is patched📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to send_sms endpoint
- Commands like ';', '|', '&', '`' in POST parameters
- Multiple failed authentication attempts followed by successful high-privilege access
Network Indicators:
- Unusual outbound connections from server following send_sms requests
- Traffic patterns suggesting command execution
SIEM Query:
source="web_logs" AND uri="*/send_sms*" AND (param="*;*" OR param="*|*" OR param="*&*" OR param="*`*")