CVE-2023-28652
📋 TL;DR
This vulnerability allows authenticated users to upload malicious image files that can cause a denial-of-service condition. It affects industrial control systems and related software that process image uploads without proper validation.
💻 Affected Systems
- Industrial control systems and related software with image upload functionality
📦 What is this software?
Ey As525f001 Firmware by Sauter Controls
⚠️ Risk & Real-World Impact
Worst Case
Complete system unavailability requiring manual intervention to restore service, potentially disrupting critical industrial operations.
Likely Case
Temporary service disruption affecting specific functionality until the malicious file is removed or the system restarts.
If Mitigated
No impact if proper file validation and authentication controls are implemented.
🎯 Exploit Status
Requires authenticated access but exploitation is straightforward once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor-specific updates
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-082-03
Restart Required: Yes
Instructions:
1. Identify affected systems using vendor documentation
2. Apply vendor-provided patches or updates
3. Restart affected services/systems
4. Verify the fix is applied
🔧 Temporary Workarounds
Restrict image upload permissions
allLimit image upload capabilities to trusted users only
Implement file validation
allAdd server-side validation for uploaded image files
🧯 If You Can't Patch
- Implement strict access controls to limit authenticated users who can upload files
- Deploy network segmentation to isolate affected systems from critical operations
🔍 How to Verify
Check if Vulnerable:
Check if system has image upload functionality and review authentication logs for unauthorized upload attemptsCheck Version:
Vendor-specific; consult product documentationVerify Fix Applied:
Test image upload functionality with various file types to ensure proper validation📡 Detection & Monitoring
Log Indicators:
- Multiple failed image upload attempts
- Large or unusual image file uploads
- System crash/restart logs following uploads
Network Indicators:
- Unusual spikes in file upload traffic
- Uploads of non-standard image file types
SIEM Query:
source="application_logs" AND (event="file_upload" AND file_type="image") AND size>10000000