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Cisco Bug: CSCvt88710 - webvpn-l7-auth: "NTLMV2" Domain name should be converted to uppercase when entered in lowercase

Last Modified

May 08, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases


Description (partial)

As per NTLMV2 protocol, the domain name should first be converted into upper case and then the hash should be calculated. The problem is by default whenever users enter the domain name in lower cases, the NTLMv2 authentication fails and it automatically falls back to NTLVv1 which is a security risk for the customer and therefor customer would like to fix this issue. The same setup works fine with smart tunnel but it’s not working without smart tunnel.

Clientless SSL VPN
NTLM authentication
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