CVE-2025-67432
📋 TL;DR
A stack overflow vulnerability in the ZBarcode_Encode function of Monkeybread Software MBS DynaPDF Plugin v21.3.1.1 allows attackers to cause Denial of Service (DoS) by sending crafted input. This affects systems using the vulnerable plugin version for PDF generation with barcode functionality.
💻 Affected Systems
- Monkeybread Software MBS DynaPDF Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash leading to service unavailability, potentially disrupting business operations that rely on PDF generation with barcodes.
Likely Case
Application instability or crashes when processing malicious barcode input, resulting in temporary DoS until service restart.
If Mitigated
Limited impact with proper input validation and monitoring; crashes would be detected and services could be automatically restarted.
🎯 Exploit Status
Exploitation requires crafting specific input to trigger the stack overflow; no public exploit code is available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor for updated version
Vendor Advisory: https://www.monkeybreadsoftware.de/
Restart Required: No
Instructions:
1. Contact Monkeybread Software for patch information. 2. Update to the latest version of MBS DynaPDF Plugin. 3. Verify the update resolves the vulnerability.
🔧 Temporary Workarounds
Input Validation
allImplement strict input validation for barcode data to reject malformed or overly large inputs.
Disable Vulnerable Function
allTemporarily disable or restrict access to the ZBarcode_Encode function if not essential.
🧯 If You Can't Patch
- Implement network segmentation to isolate systems using the vulnerable plugin.
- Deploy monitoring and alerting for application crashes or unusual barcode processing behavior.
🔍 How to Verify
Check if Vulnerable:
Check the installed version of MBS DynaPDF Plugin; if it is v21.3.1.1, the system is vulnerable.Check Version:
Consult plugin documentation or system logs for version information.Verify Fix Applied:
After updating, confirm the plugin version is no longer v21.3.1.1 and test barcode encoding functionality.📡 Detection & Monitoring
Log Indicators:
- Application crash logs related to ZBarcode_Encode function
- Error messages indicating stack overflow or memory issues
Network Indicators:
- Unusual spikes in barcode-related API calls
- Requests with abnormally large or malformed barcode data
SIEM Query:
Search for events containing 'ZBarcode_Encode' AND ('crash' OR 'overflow' OR 'DoS') in application logs.