Disable anonymous logon in ntlmrelayx #1179
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By default, SMBSERVER allows anonymous logon. For ntlmrelayx, this is not desired since we're not interested in relaying an anonymous session, and ntlmrelayx even skips anonymous logons. After the patch for the PetitPotam exploit, the service now tries to logon with an anonymous session, but if we're returning STATUS_ACCESS_DENIED, the service will continue to NTLM authentication. This patch will create a new option for SMBSERVER that can disable anonymous logon via config_parser/serverConfig. Anonymous logon sessions will now return STATUS_ACCESS_DENIED.
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Hi @ly4k! Great addition, thanks for the PR! Merging... |
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By default, SMBSERVER allows anonymous logon. For ntlmrelayx, this
is not desired since we're not interested in relaying an anonymous
session, and ntlmrelayx even skips anonymous logons. After the patch for
the PetitPotam exploit, the service now tries to logon with an anonymous
session, but if we're returning STATUS_ACCESS_DENIED, the service will
continue to NTLM authentication. This patch will create a new option for SMBSERVER
that can disable anonymous logon via config_parser/serverConfig.
Anonymous logon sessions will now return STATUS_ACCESS_DENIED.