LM and NTLMv1 Authentication Enabled

ID: lm-ntlmv1-authentication-enabled

Severity: high

Author: princechaddha

Tags: lm,ntlmv1,authentication,code,windows-audit

Description

Checks if LM and NTLMv1 authentication protocols are enabled, which are insecure.

YAML Source

id: lm-ntlmv1-authentication-enabled

info:
  name: LM and NTLMv1 Authentication Enabled
  author: princechaddha
  severity: high
  description: Checks if LM and NTLMv1 authentication protocols are enabled, which are insecure.
  impact: |
    Legacy authentication methods such as LM and NTLMv1 are vulnerable to brute-force and pass-the-hash attacks.
  remediation: |
    Disable LM and NTLMv1 and enforce NTLMv2 or Kerberos for secure authentication.
  tags: lm,ntlmv1,authentication,code,windows-audit

self-contained: true

code:
  - pre-condition: |
      IsWindows();
    engine:
      - powershell
      - powershell.exe
    args:
      - -ExecutionPolicy
      - Bypass
    pattern: "*.ps1"
    source: |
      $level = (Get-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Control\Lsa' -Name 'LmCompatibilityLevel' -ErrorAction SilentlyContinue).LmCompatibilityLevel; if ($level -lt 3 -or $level -eq $null) { if ($level -eq $null) {"LM Compatibility Level is not set"} else {"LM Compatibility Level is misconfigured (current value: $level)"}} else {"LM Compatibility Level is securely configured (current value: $level)"}

    matchers:
      - type: word
        words:
          - "LM Compatibility Level is misconfigured"
# digest: 4b0a00483046022100954b92d860fbf494ecc64eef5b9818703ce1d5aaccce547cfdb14e5734965e2c022100f5ff6b06bcbfb54a62a4a36b9b0155f8ee32a58244a575533716a39a1acff1c2:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "code/windows/audit/lm-ntlmv1-authentication-enabled.yaml"

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