SMB Vulnerabilities Scanner
Tests for SMB vulnerabilities including EternalBlue.
What is SMB Vulnerabilities?
SMB (Server Message Block) vulnerability testing identifies security issues in Windows file sharing: EternalBlue (MS17-010), SMBv1 weaknesses, null sessions, share enumeration, pass-the-hash attacks, signing issues, and relay attacks. SMB vulnerabilities have enabled major attacks like WannaCry and NotPetya.
Why is This Important?
SMB runs on almost every Windows system and many NAS devices. EternalBlue and related vulnerabilities allow remote code execution without authentication. SMB relay and pass-the-hash enable lateral movement. SMB exposed to the internet is immediately targeted by worms and attackers.
How It Works
1. Network Discovery
Scans and fingerprints network services, identifying open ports, protocols, and service versions.
2. Protocol Analysis
Tests protocol implementations for misconfigurations, weak encryption, and known vulnerabilities.
3. Infrastructure Assessment
Provides comprehensive network security posture with prioritized remediation recommendations.
Key Capabilities
Enterprise network security assessment covering infrastructure, protocols, and service configurations.
- Comprehensive port and service discovery
- Protocol-specific vulnerability checks
- TLS/SSL configuration analysis
- Legacy protocol detection and assessment
- Network segmentation validation
Frequently Asked Questions
What is EternalBlue and am I vulnerable?
EternalBlue (MS17-010) exploits a buffer overflow in SMBv1 for unauthenticated remote code execution. Patched in 2017, but many systems remain vulnerable. Test with: nmap --script smb-vuln-ms17-010. Any Windows system with SMBv1 enabled and without patch is vulnerable.
Should SMBv1 be disabled?
Yes, disable SMBv1 everywhere. It's deprecated, insecure, and enables EternalBlue. Modern Windows uses SMBv2/v3. Legitimate SMBv1 requirements are rare (very old systems). Microsoft provides guidance for disabling. Test compatibility before disabling in production.
What are SMB relay attacks?
When a client connects to SMB, the attacker intercepts authentication and relays it to a different server, gaining access as that user. Defenses: require SMB signing, disable NTLM where possible, use Kerberos, enable EPA (Extended Protection for Authentication), and segment networks.
What SMB settings should I audit?
Check for: SMBv1 enabled, missing security patches, SMB signing not required, guest access enabled, null sessions allowed, sensitive shares exposed, and SMB exposed to internet (port 445). Use enum4linux or nmap SMB scripts for enumeration.
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