CVE-2021-21457
📋 TL;DR
CVE-2021-21457 is a memory corruption vulnerability in SAP 3D Visual Enterprise Viewer version 9 caused by improper input validation when processing IFF files. An attacker can crash the application by tricking a user into opening a malicious IFF file, causing temporary denial of service. This affects organizations using SAP 3D Visual Enterprise Viewer for viewing 3D models and technical illustrations.
💻 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 causing temporary denial of service until the user restarts the application.
If Mitigated
Minimal impact if users only open trusted files and application isolation is enforced.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file. No public exploit code is 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 the patch from SAP Support Portal using note 3002617. 2. Apply the patch to SAP 3D Visual Enterprise Viewer installation. 3. Restart the application and any affected services.
🔧 Temporary Workarounds
Restrict IFF file processing
allConfigure the application to block or warn when opening IFF files from untrusted sources.
User awareness training
allTrain users to only open IFF files from trusted sources and verify file integrity.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized files.
- Use endpoint protection with file reputation services to block malicious IFF files.
🔍 How to Verify
Check if Vulnerable:
Check if SAP 3D Visual Enterprise Viewer version 9 is installed without Security Note 3002617 applied.Check Version:
Check application about dialog or installation directory for version information.Verify Fix Applied:
Verify that Security Note 3002617 is applied and the application version shows the patch is installed.📡 Detection & Monitoring
Log Indicators:
- Application crash logs related to IFF file processing
- Error messages indicating memory access violations
Network Indicators:
- Unusual file transfers of IFF files to user workstations
SIEM Query:
EventID: 1000 Application Error for SAP 3D Visual Enterprise Viewer