CVE-2021-21461
📋 TL;DR
CVE-2021-21461 is a critical vulnerability in SAP 3D Visual Enterprise Viewer version 9 that allows attackers to crash the application by tricking users into opening malicious BMP files. This improper input validation flaw causes denial of service, requiring application restart. Users of SAP 3D Visual Enterprise Viewer version 9 are affected.
💻 Affected Systems
- SAP 3D Visual Enterprise Viewer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of service for SAP 3D Visual Enterprise Viewer, disrupting business processes that rely on 3D visualization capabilities until application restart.
Likely Case
Application crashes when users open malicious BMP files, causing temporary unavailability and productivity loss until restart.
If Mitigated
Minimal impact if users only open trusted files and application is quickly restarted after crashes.
🎯 Exploit Status
Exploitation requires user interaction to open malicious BMP file. No authentication bypass needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Security Note 3002617
Vendor Advisory: https://launchpad.support.sap.com/#/notes/3002617
Restart Required: Yes
Instructions:
1. Download SAP Security Note 3002617 from SAP Support Portal. 2. Apply the patch according to SAP documentation. 3. Restart SAP 3D Visual Enterprise Viewer.
🔧 Temporary Workarounds
Restrict BMP file processing
allConfigure application to block or warn on BMP file processing
User awareness training
allTrain users to avoid opening BMP files from untrusted sources
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of SAP 3D Visual Enterprise Viewer
- Use network segmentation to isolate vulnerable systems
🔍 How to Verify
Check if Vulnerable:
Check if SAP 3D Visual Enterprise Viewer version 9 is installed without SAP Security Note 3002617 appliedCheck Version:
Check application about dialog or installation logs for version informationVerify Fix Applied:
Verify SAP Security Note 3002617 is applied and application version shows as patched📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected termination events
- Error messages related to BMP file processing
Network Indicators:
- Unusual BMP file downloads to SAP 3D Visual Enterprise Viewer systems
SIEM Query:
EventID: 1000 OR EventID: 1001 WHERE Source contains 'SAP 3D Visual Enterprise Viewer'