CVE-2023-5964
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code with SYSTEM permissions on Windows systems running 1E End-User Interaction product pack. Attackers can exploit improper input validation in the Show dialogue instruction to gain complete control of affected systems. Only organizations using 1E Exchange End-User Interaction product pack are affected.
💻 Affected Systems
- 1E Exchange End-User Interaction product pack
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with SYSTEM privileges leading to complete data exfiltration, ransomware deployment, or persistent backdoor installation across the entire Windows environment.
Likely Case
Lateral movement within the network, privilege escalation to domain admin, and deployment of additional malware payloads.
If Mitigated
Limited impact if proper network segmentation and least privilege principles are implemented, though local system compromise would still occur.
🎯 Exploit Status
Exploitation requires ability to trigger the vulnerable instruction with crafted input.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.1 or above
Vendor Advisory: https://www.1e.com/trust-security-compliance/cve-info/
Restart Required: No
Instructions:
1. Delete the 'Show dialogue with caption %Caption% and message %Message%' instruction from Settings UI. 2. Install updated End-User Interaction product pack version 7.1+. 3. Deploy new '1E-Exchange-ShowNotification' instruction.
🔧 Temporary Workarounds
Remove vulnerable instruction
windowsDelete the vulnerable instruction from all configurations to prevent exploitation
Navigate to Settings UI and delete 'Show dialogue with caption %Caption% and message %Message%' instruction
🧯 If You Can't Patch
- Immediately remove the vulnerable 'Show dialogue with caption %Caption% and message %Message%' instruction from all configurations
- Implement strict network segmentation to isolate systems running 1E End-User Interaction and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check if 'Show dialogue with caption %Caption% and message %Message%' instruction exists in 1E Exchange Settings UI and End-User Interaction product pack version is below 7.1Check Version:
Check 1E Exchange console for End-User Interaction product pack versionVerify Fix Applied:
Confirm vulnerable instruction is removed and replaced with '1E-Exchange-ShowNotification' instruction, and product pack version shows 7.1 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual execution of dialogue/show instructions with unexpected parameters
- Process creation events from 1E processes with SYSTEM privileges
Network Indicators:
- Unusual outbound connections from systems running 1E End-User Interaction
SIEM Query:
Process creation where parent_process_name contains '1E' and integrity_level='SYSTEM'