CVE-2020-6789
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code on systems running vulnerable versions of Bosch Monitor Wall installer. Attackers can achieve this by tricking users into placing a malicious DLL in the same directory as the installer. This affects all users of Bosch Monitor Wall installer version 10.00.0164 and earlier.
💻 Affected Systems
- Bosch Monitor Wall installer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control over the victim's system, enabling data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive data and system resources, potentially enabling lateral movement within the network.
If Mitigated
No impact if proper security controls prevent execution of untrusted files or if the system is patched to the latest version.
🎯 Exploit Status
Exploitation requires social engineering to place malicious DLL and user interaction to run installer
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version newer than 10.00.0164
Vendor Advisory: https://psirt.bosch.com/security-advisories/bosch-sa-835563-bt.html
Restart Required: Yes
Instructions:
1. Download latest Bosch Monitor Wall installer from official Bosch website
2. Uninstall current version
3. Install updated version
4. Restart system
🔧 Temporary Workarounds
Restrict DLL loading from current directory
windowsConfigure Windows to prevent DLL loading from current directory using SafeDllSearchMode
reg add "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager" /v SafeDllSearchMode /t REG_DWORD /d 1 /f
Use application whitelisting
windowsConfigure Windows Defender Application Control or AppLocker to restrict execution to trusted locations only
🧯 If You Can't Patch
- Educate users to never run installers from untrusted directories or download locations
- Implement least privilege principles - run installer with minimal necessary permissions
🔍 How to Verify
Check if Vulnerable:
Check installed version of Bosch Monitor Wall - if version is 10.00.0164 or earlier, system is vulnerableCheck Version:
Check program properties or About dialog in Bosch Monitor Wall applicationVerify Fix Applied:
Verify installed version is newer than 10.00.0164 and check vendor advisory for confirmation📡 Detection & Monitoring
Log Indicators:
- Process creation events for installer from unusual directories
- DLL loading from current directory with installer process
Network Indicators:
- Unusual outbound connections following installer execution
SIEM Query:
Process Creation where (Image contains 'installer' OR CommandLine contains 'install') AND (CurrentDirectory contains unusual path OR ParentImage from untrusted location)