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Web Resource Requires NTLM Authentication

Netsparker detected NTLM authentication is required for a resource.

Generally, using NTLM authentication is not a good solution.

Impact

There are some potential issues:
  1. It may cause some information leakage.
  2. It may be possible to brute-force or/and lock accounts. Can rarely cause DoS.
  3. If this is an admin screen, it should not be publicly accessible.
  4. If this is an unrequired login screen, it should be removed.

Remedy

  • See Impact.
  • Disable NTLM authentication or apply firewall rules.

External References

Considerations for IIS Authentication 

 


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