CVE-2020-37202
📋 TL;DR
NetworkSleuth 3.0.0.0 contains a buffer overflow vulnerability in the registration key validation that allows attackers to crash the application by supplying an oversized key. This affects all users of NetworkSleuth 3.0.0.0 who have the registration feature enabled. The vulnerability requires an attacker to have access to the application interface.
💻 Affected Systems
- NetworkSleuth
⚠️ 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 denial of service where NetworkSleuth crashes and becomes unavailable for network auditing tasks, potentially disrupting network monitoring operations.
Likely Case
Application crash requiring manual restart, causing temporary disruption to network auditing capabilities until service is restored.
If Mitigated
No impact if registration feature is disabled or application is not exposed to untrusted users.
🎯 Exploit Status
Exploit requires pasting a 1000-character payload into registration key field. Public exploit code available on Exploit-DB.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://www.nsauditor.com/
Restart Required: No
Instructions:
No official patch available. Check vendor website for updates. Consider upgrading to newer version if available.
🔧 Temporary Workarounds
Disable Registration Feature
windowsRemove or restrict access to registration functionality to prevent exploitation
Input Validation
windowsImplement input validation to reject registration keys longer than expected length
🧯 If You Can't Patch
- Restrict access to NetworkSleuth interface to trusted users only
- Monitor for application crashes and investigate any suspicious registration attempts
🔍 How to Verify
Check if Vulnerable:
Check if running NetworkSleuth version 3.0.0.0. Attempt to paste 1000-character string into registration key field.Check Version:
Check application About dialog or installation directory for version informationVerify Fix Applied:
Test with oversized registration key payload to ensure application doesn't crash.📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unexpected termination events
- Registration attempts with unusually long keys
Network Indicators:
- Unusual traffic to NetworkSleuth registration endpoint
SIEM Query:
EventID: 1000 OR EventID: 1001 WHERE SourceName='NetworkSleuth' OR ProcessName='NetworkSleuth.exe'