CVE-2021-21455
📋 TL;DR
CVE-2021-21455 is a memory corruption vulnerability in SAP 3D Visual Enterprise Viewer version 9 caused by improper input validation when processing DIB files. Attackers can craft malicious DIB files that crash the application when opened, causing denial of service. Users who open untrusted DIB files with this software are affected.
💻 Affected Systems
- SAP 3D Visual Enterprise Viewer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if memory corruption can be weaponized beyond denial of service.
Likely Case
Application crash and denial of service requiring manual restart, disrupting business workflows using 3D visualization.
If Mitigated
Limited to application restart if proper file validation prevents exploitation.
🎯 Exploit Status
Exploitation requires user interaction to open malicious file. No public exploit code available.
🛠️ 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 patch from SAP Support Portal. 2. Apply patch according to SAP documentation. 3. Restart application. 4. Verify patch installation.
🔧 Temporary Workarounds
Restrict DIB file processing
allConfigure application to block or warn on DIB file processing
User awareness training
allTrain users not to open DIB files from untrusted sources
🧯 If You Can't Patch
- Restrict application use to trusted environments only
- Implement application whitelisting to prevent unauthorized execution
🔍 How to Verify
Check if Vulnerable:
Check if SAP 3D Visual Enterprise Viewer version 9 is installed without SAP Note 3002617 applied.Check Version:
Check application about dialog or consult SAP system documentation.Verify Fix Applied:
Verify SAP Note 3002617 is applied in SAP system or check application version.📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected termination events
- Error messages related to DIB processing
Network Indicators:
- Unusual file transfers with .dib extension
- Email attachments with DIB files
SIEM Query:
EventID: 1000 Application Error for SAP 3D Visual Enterprise Viewer OR file extension:.dib