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Handle unknown/unexpected tokens in login. See #1554

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This commit is contained in:
dmiller
2022-01-04 20:36:43 +00:00
parent f78be32513
commit e8df904e7e
1 changed files with 17 additions and 10 deletions
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27
nselib/mssql.lua
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@@ -1674,7 +1674,7 @@ Token =
return -1, "Failed to process NTLMSSP Challenge"
end
local ntlm_challenge = data:sub( 28, 35 )
local ntlm_challenge = {nonce=data:sub( 28, 35 ), type=TokenType.NTLMSSP_CHALLENGE}
pos = pos + len - 13
return pos, ntlm_challenge
end,
@@ -2952,15 +2952,7 @@ Helper =
return false, data
end
if ( ntlmAuth ) then
local pos, nonce = Token.ParseToken( data, pos )
local authpacket = NTAuthenticationPacket:new( username, password, domain, nonce )
status, result = self.stream:Send( authpacket:ToString() )
status, data = self.stream:Receive()
if ( not(status) ) then
return false, data
end
end
local doNTLM = ntlmAuth
while( pos < data:len() ) do
pos, token = Token.ParseToken( data, pos )
@@ -2981,6 +2973,21 @@ Helper =
return false, errorMessage, token.errno
elseif ( token.type == TokenType.LoginAcknowledgement ) then
return true, "Login Success"
elseif doNTLM and token.type == TokenType.NTLMSSP_CHALLENGE then
local authpacket = NTAuthenticationPacket:new( username, password, domain, token.nonce )
status, result = self.stream:Send( authpacket:ToString() )
status, data = self.stream:Receive()
if not status then
return false, data
end
doNTLM = false -- don't try again.
else
local found, ttype = tableaux.contains(TokenType, token.type)
if found then
stdnse.debug2("Unexpected token type: %s", ttype)
else
stdnse.debug2("Unknown token type: 0x%02x", token.type)
end
end
end