CVE-2020-7085 – A heap overflow vulnerability in Autodesk FBX-S... (How to Fix)

Q: What is the severity of CVE-2020-7085?

CVE-2020-7085 has a CVSS score of 7.8 (HIGH). A heap overflow vulnerability in Autodesk FBX-SDK versions 2019.2 and earlier allows attackers to execute arbitrary code on affected systems. This affects any application or service that uses the vulnerable FBX-SDK library for processing FBX 3D model files. Attackers could exploit this by tricking users into opening malicious FBX files.

📋 TL;DR

A heap overflow vulnerability in Autodesk FBX-SDK versions 2019.2 and earlier allows attackers to execute arbitrary code on affected systems. This affects any application or service that uses the vulnerable FBX-SDK library for processing FBX 3D model files. Attackers could exploit this by tricking users into opening malicious FBX files.

💻 Affected Systems

Products:

Autodesk FBX-SDK
Any software using FBX-SDK library

Versions: 2019.2 and earlier

Operating Systems: Windows, Linux, macOS

Default Config Vulnerable: ⚠️ Yes

Notes: Any application linking against vulnerable FBX-SDK versions is affected when processing FBX files.

📦 What is this software?

Fbx Software Development Kit by Autodesk

View all CVEs affecting Fbx Software Development Kit →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full system compromise with remote code execution leading to data theft, ransomware deployment, or persistent backdoor installation.

🟠

Likely Case

Local privilege escalation or application crash when processing specially crafted FBX files, potentially leading to system compromise.

🟢

If Mitigated

Application crash without code execution if memory protections are enabled, but denial of service still occurs.

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires user interaction to open malicious FBX files or automated processing of untrusted FBX files.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: FBX-SDK 2020.0 or later

Vendor Advisory: https://www.autodesk.com/trust/security-advisories/adsk-sa-2020-0002

Restart Required: Yes

Instructions:

1. Download FBX-SDK 2020.0 or later from Autodesk website. 2. Uninstall previous FBX-SDK versions. 3. Install updated FBX-SDK. 4. Rebuild any applications using FBX-SDK with updated library. 5. Restart affected systems.

🔧 Temporary Workarounds

Restrict FBX file processing

all

Block or sandbox processing of untrusted FBX files

Application control

all

Use application whitelisting to prevent unauthorized FBX processing applications

🧯 If You Can't Patch

Implement strict file validation for FBX files before processing
Isolate systems processing FBX files in segmented network zones

🔍 How to Verify

Check if Vulnerable:

Check FBX-SDK version in installed applications or library paths

Check Version:

Check application documentation or library version files

Verify Fix Applied:

Verify FBX-SDK version is 2020.0 or later

📡 Detection & Monitoring

Log Indicators:

Application crashes when processing FBX files
Unexpected memory access errors in application logs

Network Indicators:

Unusual outbound connections after FBX file processing

SIEM Query:

Application:FBX-SDK AND (EventID:1000 OR ExceptionCode:c0000005)

📊 Metadata

CVE ID: CVE-2020-7085

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

CWE: CWE-787

Published: April 17, 2020

Last Updated: November 21, 2024

🔗 References

https://www.autodesk.com/trust/security-advisories/adsk-sa-2020-0002 Vendor Advisory
https://www.autodesk.com/trust/security-advisories/adsk-sa-2020-0002 Vendor Advisory

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🔗 Related Vulnerabilities

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