CVE-2023-35850
📋 TL;DR
This vulnerability allows authenticated attackers with administrator or privileged accounts in SUNNET WMPro portal to execute arbitrary system commands through insufficient input filtering in the file management function. This affects organizations using vulnerable versions of SUNNET WMPro portal software.
💻 Affected Systems
- SUNNET WMPro portal
📦 What is this software?
Wmpro by Sun.net
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary commands, install malware, exfiltrate data, or disrupt critical services.
Likely Case
Privileged attackers gaining unauthorized system access, potentially leading to data theft, service disruption, or lateral movement within the network.
If Mitigated
Limited impact if proper access controls, network segmentation, and monitoring are in place to detect and block command injection attempts.
🎯 Exploit Status
Exploitation requires authenticated privileged access but command injection is typically straightforward once access is obtained
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-7373-4ef46-1.html
Restart Required: Yes
Instructions:
1. Contact SUNNET vendor for patch information 2. Apply available security updates 3. Restart affected services 4. Verify patch application
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation and sanitization for file management functions
Not applicable - requires code changes
Privilege Reduction
allRestrict administrator privileges and implement least privilege access controls
Not applicable - requires policy/configuration changes
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WMPro portal from critical systems
- Deploy web application firewall (WAF) with command injection detection rules
🔍 How to Verify
Check if Vulnerable:
Check WMPro portal version against vendor advisory and test file management functions for input validation weaknessesCheck Version:
Check vendor documentation for version identification methodVerify Fix Applied:
Verify patch version installation and test that command injection attempts are properly blocked📡 Detection & Monitoring
Log Indicators:
- Unusual file management operations
- Suspicious command execution patterns
- Multiple failed authentication attempts followed by successful privileged access
Network Indicators:
- Unusual outbound connections from WMPro server
- Command and control traffic patterns
SIEM Query:
source="wmpro" AND (event_type="file_upload" OR event_type="file_management") AND command="*"