CVE-2021-27589 – CVE-2021-27589 is a denial-of-service vulnerabi... (How to Fix)

Q: What is the severity of CVE-2021-27589?

CVE-2021-27589 has a CVSS score of 7.8 (HIGH). CVE-2021-27589 is a denial-of-service vulnerability in SAP 3D Visual Enterprise Viewer version 9. When users open malicious SVG files, the application crashes and becomes unavailable until restarted. This affects organizations using the vulnerable SAP viewer software.

📋 TL;DR

CVE-2021-27589 is a denial-of-service vulnerability in SAP 3D Visual Enterprise Viewer version 9. When users open malicious SVG files, the application crashes and becomes unavailable until restarted. This affects organizations using the vulnerable SAP viewer software.

💻 Affected Systems

Products:

SAP 3D Visual Enterprise Viewer

Versions: Version 9

Operating Systems: Windows, Linux

Default Config Vulnerable: ⚠️ Yes

Notes: All installations of version 9 are vulnerable when processing SVG files.

📦 What is this software?

3d Visual Enterprise Viewer by Sap

View all CVEs affecting 3d Visual Enterprise Viewer →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers could repeatedly crash the application, causing sustained disruption to business processes that rely on 3D visualization capabilities.

🟠

Likely Case

Temporary application unavailability requiring manual restart, disrupting individual user workflows.

🟢

If Mitigated

Minimal impact with proper file handling controls and user awareness.

🌐 Internet-Facing: LOW - The vulnerability requires user interaction with malicious files, not direct network exploitation.

🏢 Internal Only: MEDIUM - Internal users could be targeted via phishing or shared malicious files, causing productivity loss.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires user interaction to open malicious SVG files. No authentication bypass needed if user opens file.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Apply SAP Security Note 3027758

Vendor Advisory: https://launchpad.support.sap.com/#/notes/3027758

Restart Required: Yes

Instructions:

1. Download SAP Security Note 3027758 from SAP Support Portal
2. Apply the patch according to SAP documentation
3. Restart SAP 3D Visual Enterprise Viewer

🔧 Temporary Workarounds

Restrict SVG file handling

all

Configure system to block SVG files or use alternative viewers for SVG content

User awareness training

all

Train users not to open SVG files from untrusted sources

🧯 If You Can't Patch

Implement application whitelisting to restrict SVG file execution
Use network/email filtering to block SVG attachments from untrusted sources

🔍 How to Verify

Check if Vulnerable:

Check if SAP 3D Visual Enterprise Viewer version 9 is installed without Security Note 3027758 applied

Check Version:

Check application version in About dialog or consult SAP system documentation

Verify Fix Applied:

Verify Security Note 3027758 is applied in SAP system and test with known safe SVG files

📡 Detection & Monitoring

Log Indicators:

Application crash logs from SAP 3D Visual Enterprise Viewer
Unexpected termination events in system logs

Network Indicators:

Unusual SVG file transfers to user workstations

SIEM Query:

EventID: 1000 OR EventID: 1001 with Source: SAP 3D Visual Enterprise Viewer

📊 Metadata

CVE ID: CVE-2021-27589

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published: March 9, 2021

Last Updated: November 21, 2024

🔗 References

https://launchpad.support.sap.com/#/notes/3027758 Vendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=571343107 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-306/ Third Party Advisory,VDB Entry
https://launchpad.support.sap.com/#/notes/3027758 Vendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=571343107 Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-306/ Third Party Advisory,VDB Entry

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