CVE-2021-47894
📋 TL;DR
Managed Switch Port Mapping Tool 2.85.2 contains a buffer overflow vulnerability that allows attackers to crash the application by inputting oversized data into IP Address and SNMP Community Name fields. This creates a denial of service condition affecting users of this specific software version. The vulnerability requires local or network access to the application interface.
💻 Affected Systems
- Managed Switch Port Mapping Tool
⚠️ 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 requiring manual restart, disrupting network mapping operations and potentially causing service downtime for dependent processes.
Likely Case
Application becomes unresponsive and crashes, requiring user intervention to restart and losing any unsaved configuration or mapping data.
If Mitigated
Application remains functional with proper input validation or network segmentation preventing exploitation attempts.
🎯 Exploit Status
Exploit requires access to the application interface to input malicious data into specific fields. Proof of concept code is publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No vendor advisory found
Restart Required: No
Instructions:
No official patch available. Check vendor website for updates: https://switchportmapper.com/
🔧 Temporary Workarounds
Input Validation Enforcement
allImplement strict input validation to limit field lengths to reasonable values
Network Segmentation
allRestrict network access to the application to trusted users only
🧯 If You Can't Patch
- Monitor application logs for crash events or unusual input patterns
- Implement application whitelisting to prevent unauthorized modifications
🔍 How to Verify
Check if Vulnerable:
Test by inputting 10,000+ characters into IP Address or SNMP Community Name fields and observe if application crashesCheck Version:
Check Help > About in application interfaceVerify Fix Applied:
Verify updated version no longer crashes with oversized input📡 Detection & Monitoring
Log Indicators:
- Application crash events
- Unusually long input strings in application logs
Network Indicators:
- Sudden cessation of application network traffic
SIEM Query:
EventID: 1000 OR EventID: 1001 AND Source: 'Managed Switch Port Mapping Tool'