CVE-2024-7323
📋 TL;DR
Digiwin EasyFlow .NET has an access control vulnerability combined with insufficient input filtering, allowing authenticated remote attackers to download arbitrary files from the server. This affects organizations using vulnerable versions of Digiwin EasyFlow .NET workflow software. Regular users can exploit this to access sensitive system files.
💻 Affected Systems
- Digiwin EasyFlow .NET
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could download critical system files (passwords, configuration files, database credentials), leading to complete system compromise and data exfiltration.
Likely Case
Attackers download sensitive business documents, user data, or configuration files containing credentials, leading to data breach and potential lateral movement.
If Mitigated
With proper network segmentation and file system permissions, impact limited to accessible directories only.
🎯 Exploit Status
Exploitation requires authenticated access but appears straightforward based on vulnerability description
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-7990-87183-2.html
Restart Required: Yes
Instructions:
1. Contact Digiwin for patch information
2. Apply the latest security update
3. Restart the EasyFlow service
4. Verify the fix
🔧 Temporary Workarounds
Restrict File System Access
windowsApply strict file system permissions to limit what directories the EasyFlow service account can access
icacls "C:\Program Files\Digiwin\" /deny EASYFLOW_SERVICE_ACCOUNT:(OI)(CI)(F)
Network Segmentation
allIsolate EasyFlow servers from sensitive systems and limit user access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate EasyFlow servers
- Apply principle of least privilege to file system and service accounts
🔍 How to Verify
Check if Vulnerable:
Check if you're running Digiwin EasyFlow .NET and review version against vendor advisoryCheck Version:
Check application version in control panel or application interfaceVerify Fix Applied:
Test if authenticated users can still access arbitrary files via the vulnerable functionality📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns from EasyFlow application
- Multiple file download requests from single user session
Network Indicators:
- Unexpected outbound file transfers from EasyFlow server
SIEM Query:
source="EasyFlow" AND (event="FileDownload" OR event="FileAccess") AND file_path CONTAINS ".."