CVE-2020-37212
📋 TL;DR
SpotMSN 2.4.6 contains a buffer overflow vulnerability in the registration name field that allows attackers to crash the application by inputting a 1000-character payload. This affects all users running the vulnerable version of SpotMSN, causing denial of service.
💻 Affected Systems
- SpotMSN
📦 What is this software?
Spotmsn by Nsasoft
⚠️ Risk & Real-World Impact
Worst Case
Complete application crash making the software unusable until restarted, potentially disrupting business operations if SpotMSN is mission-critical.
Likely Case
Application crash requiring manual restart, causing temporary service disruption for the affected user.
If Mitigated
No impact if the vulnerability is patched or workarounds are implemented.
🎯 Exploit Status
Exploit is publicly available on Exploit-DB (ID 47869) and requires minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://www.nsauditor.com/
Restart Required: No
Instructions:
Check vendor website for updates. If no patch is available, implement workarounds or upgrade to a newer version if one exists.
🔧 Temporary Workarounds
Input Validation
allImplement client-side or server-side validation to restrict name field length to a safe limit (e.g., 255 characters).
Application Firewall Rules
allDeploy a web application firewall (WAF) to block requests with excessively long name parameters.
🧯 If You Can't Patch
- Restrict access to SpotMSN to trusted users only.
- Monitor application logs for crash events and investigate any anomalies.
🔍 How to Verify
Check if Vulnerable:
Attempt to paste a 1000-character string into the registration name field in SpotMSN 2.4.6 and observe if the application crashes.Check Version:
Check the 'About' section in SpotMSN or look at the executable properties to confirm version 2.4.6.Verify Fix Applied:
After applying a patch or workaround, test with the same 1000-character payload to ensure the application no longer crashes.📡 Detection & Monitoring
Log Indicators:
- Application crash logs in Windows Event Viewer
- Unexpected termination of SpotMSN process
Network Indicators:
- Unusual network traffic to SpotMSN instances if exploited remotely
SIEM Query:
EventID=1000 AND ProcessName="SpotMSN.exe" AND Description contains "crash"