CVE-2024-28135
📋 TL;DR
A command injection vulnerability in the API allows low-privileged remote attackers to execute arbitrary code as the user-app user due to improper input validation. This affects systems running vulnerable versions of the software with exposed APIs. Confidentiality is partially compromised.
💻 Affected Systems
- Specific product information not provided in CVE description
📦 What is this software?
Charx Sec 3000 Firmware by Phoenixcontact
Charx Sec 3050 Firmware by Phoenixcontact
Charx Sec 3100 Firmware by Phoenixcontact
Charx Sec 3150 Firmware by Phoenixcontact
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through privilege escalation, data exfiltration, and persistent backdoor installation.
Likely Case
Unauthorized code execution leading to data access, service disruption, and lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation, API authentication, and input validation controls.
🎯 Exploit Status
Exploitation requires low-privileged access to the vulnerable API endpoint. Command injection typically has low complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://cert.vde.com/en/advisories/VDE-2024-019
Restart Required: No
Instructions:
1. Check vendor advisory for patch availability
2. Apply security updates when released
3. Monitor vendor communications for specific patching instructions
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation and sanitization for API parameters
# Implement in application code: validate and sanitize all user inputs
Network Access Restriction
linuxRestrict API access to trusted networks only
# Example firewall rule: iptables -A INPUT -p tcp --dport [API_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
# iptables -A INPUT -p tcp --dport [API_PORT] -j DROP
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all API endpoints
- Restrict API access through network segmentation and firewall rules
🔍 How to Verify
Check if Vulnerable:
Review API endpoints for improper input validation. Test with controlled command injection attempts.Check Version:
# Check software version: [specific command not provided in CVE]Verify Fix Applied:
Verify input validation is properly implemented and test with malicious inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- API requests with suspicious parameters
- User-app user performing unexpected actions
Network Indicators:
- Unusual outbound connections from API server
- Suspicious payloads in API requests
SIEM Query:
source="api_logs" AND (command="*;*" OR command="*|*" OR command="*`*" OR command="*$(*)")