CVE-2020-35564
📋 TL;DR
CVE-2020-35564 is an injection vulnerability in MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software that allows attackers to execute malicious code through an outdated component. This affects organizations using these remote access solutions for industrial automation. The vulnerability stems from improper neutralization of special elements in output used by a downstream component.
💻 Affected Systems
- MB CONNECT LINE mymbCONNECT24
- MB CONNECT LINE mbCONNECT24
📦 What is this software?
Mbconnect24 by Mbconnectline
Mymbconnect24 by Mbconnectline
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and potential disruption of industrial control systems.
Likely Case
Unauthorized access to the affected system, data exfiltration, and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting the vulnerable component.
🎯 Exploit Status
The vulnerability allows for active code injection, suggesting straightforward exploitation once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.0 and later
Vendor Advisory: https://mbconnectline.com/security-advice/
Restart Required: Yes
Instructions:
1. Download latest version from MB CONNECT LINE portal. 2. Backup current configuration. 3. Install update following vendor instructions. 4. Restart the service/application. 5. Verify functionality.
🔧 Temporary Workarounds
Network Isolation
allRestrict network access to vulnerable systems using firewalls or network segmentation
Input Validation Enhancement
allImplement additional input validation and sanitization at the application level
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Deploy web application firewall (WAF) with injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check application version in admin interface or configuration files. If version is 2.6.2 or earlier, system is vulnerable.Check Version:
Check via web admin interface or consult application documentation for version commandVerify Fix Applied:
Verify version is 2.7.0 or later in admin interface and test functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns in application logs
- Unexpected process execution
- Authentication anomalies
Network Indicators:
- Unusual outbound connections from the system
- Suspicious payloads in HTTP requests
SIEM Query:
source="mymbconnect24" OR source="mbconnect24" AND (event="injection" OR event="malicious_input" OR status="500")