CVE-2021-43274
📋 TL;DR
CVE-2021-43274 is a use-after-free vulnerability in the Open Design Alliance Drawings SDK that allows attackers to execute arbitrary code by exploiting improper memory handling when parsing malicious DWF files. This affects any application using vulnerable versions of the ODA Drawings SDK to process DWF files. Attackers can leverage this vulnerability to gain control of the affected process.
💻 Affected Systems
- Open Design Alliance Drawings SDK
- Applications using ODA Drawings SDK for DWF file processing
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with full control of the affected process, potentially leading to complete system compromise, data theft, or lateral movement within the network.
Likely Case
Application crash leading to denial of service, with potential for limited code execution depending on exploit chain and memory layout.
If Mitigated
Application crash without code execution if exploit fails or memory protections are in place.
🎯 Exploit Status
Exploitation requires crafting a malicious DWF file and convincing a user to open it, or uploading it to a vulnerable application. The vulnerability description mentions it can be leveraged with other vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2022.11 or later
Vendor Advisory: https://www.opendesign.com/security-advisories
Restart Required: Yes
Instructions:
1. Identify applications using ODA Drawings SDK. 2. Update to ODA Drawings SDK version 2022.11 or later. 3. Rebuild and redeploy affected applications. 4. Restart services using the updated SDK.
🔧 Temporary Workarounds
Block DWF file processing
allDisable or block DWF file processing in affected applications if not required.
Application sandboxing
allRun applications that process DWF files in sandboxed environments with limited privileges.
🧯 If You Can't Patch
- Implement strict file upload validation to reject or sanitize DWF files from untrusted sources.
- Use application allowlisting to prevent execution of unknown or untrusted applications that might process DWF files.
🔍 How to Verify
Check if Vulnerable:
Check the version of ODA Drawings SDK used by your applications. If version is earlier than 2022.11, you are vulnerable.Check Version:
Check application documentation or contact vendor for version detection method. For ODA SDK specifically: odadwgversion or check SDK installation directory.Verify Fix Applied:
Verify that applications are using ODA Drawings SDK version 2022.11 or later and test DWF file processing functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing DWF files
- Memory access violation errors in application logs
- Unexpected process termination
Network Indicators:
- Unusual outbound connections from applications that process DWF files
- File uploads of DWF files to web applications
SIEM Query:
source="application_logs" AND ("access violation" OR "segmentation fault" OR "use after free") AND process="*dwf*" OR file_extension="dwf"