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metasploit-gs/api/Msf/Exploit/Remote/SMB/Relay/Provider/AlwaysGrantAccessAuthenticator.html
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Class: Msf::Exploit::Remote::SMB::Relay::Provider::AlwaysGrantAccessAuthenticator
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<span class="title">AlwaysGrantAccessAuthenticator</span>
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<div id="content"><h1>Class: Msf::Exploit::Remote::SMB::Relay::Provider::AlwaysGrantAccessAuthenticator
</h1>
<div class="box_info">
<dl>
<dt>Inherits:</dt>
<dd>
<span class="inheritName">RubySMB::Gss::Provider::NTLM::Authenticator</span>
<ul class="fullTree">
<li>Object</li>
<li class="next">RubySMB::Gss::Provider::NTLM::Authenticator</li>
<li class="next">Msf::Exploit::Remote::SMB::Relay::Provider::AlwaysGrantAccessAuthenticator</li>
</ul>
<a href="#" class="inheritanceTree">show all</a>
</dd>
</dl>
<dl>
<dt>Defined in:</dt>
<dd>lib/msf/core/exploit/remote/smb/relay/provider/always_grant_access.rb</dd>
</dl>
</div>
<h2>Overview</h2><div class="docstring">
<div class="discussion">
<p>An override for the default RubySMB NTLM Authenticator to always grant access, regardless of the provided credentials</p>
</div>
</div>
<div class="tags">
</div>
<h2>
Instance Method Summary
<small><a href="#" class="summary_toggle">collapse</a></small>
</h2>
<ul class="summary">
<li class="public ">
<span class="summary_signature">
<a href="#process_gss_type3-instance_method" title="#process_gss_type3 (instance method)">#<strong>process_gss_type3</strong>(gss_api) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'>
<p>take the GSS blob, extract the NTLM type 3 message and pass it to the process method to build the response which is then put back into a new GSS reply-blob.</p>
</div></span>
</li>
<li class="public ">
<span class="summary_signature">
<a href="#process_ntlm_type3-instance_method" title="#process_ntlm_type3 (instance method)">#<strong>process_ntlm_type3</strong>(type3_msg) &#x21d2; Object </a>
</span>
<span class="summary_desc"><div class='inline'></div></span>
</li>
</ul>
<div id="instance_method_details" class="method_details_list">
<h2>Instance Method Details</h2>
<div class="method_details first">
<h3 class="signature first" id="process_gss_type3-instance_method">
#<strong>process_gss_type3</strong>(gss_api) &#x21d2; <tt>Object</tt>
</h3><div class="docstring">
<div class="discussion">
<p>take the GSS blob, extract the NTLM type 3 message and pass it to the process method to build the response which is then put back into a new GSS reply-blob</p>
</div>
</div>
<div class="tags">
</div><table class="source_code">
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/remote/smb/relay/provider/always_grant_access.rb', line 16</span>
<span class='kw'>def</span> <span class='id identifier rubyid_process_gss_type3'>process_gss_type3</span><span class='lparen'>(</span><span class='id identifier rubyid_gss_api'>gss_api</span><span class='rparen'>)</span>
<span class='id identifier rubyid_parent_result'>parent_result</span> <span class='op'>=</span> <span class='kw'>super</span>
<span class='id identifier rubyid_neg_token_init'>neg_token_init</span> <span class='op'>=</span> <span class='const'>Hash</span><span class='lbracket'>[</span><span class='op'>::</span><span class='const'>RubySMB</span><span class='op'>::</span><span class='const'>Gss</span><span class='period'>.</span><span class='id identifier rubyid_asn1dig'>asn1dig</span><span class='lparen'>(</span><span class='id identifier rubyid_gss_api'>gss_api</span><span class='comma'>,</span> <span class='int'>0</span><span class='rparen'>)</span><span class='period'>.</span><span class='id identifier rubyid_value'>value</span><span class='period'>.</span><span class='id identifier rubyid_map'>map</span> <span class='lbrace'>{</span> <span class='op'>|</span><span class='id identifier rubyid_obj'>obj</span><span class='op'>|</span> <span class='lbracket'>[</span><span class='id identifier rubyid_obj'>obj</span><span class='period'>.</span><span class='id identifier rubyid_tag'>tag</span><span class='comma'>,</span> <span class='id identifier rubyid_obj'>obj</span><span class='period'>.</span><span class='id identifier rubyid_value'>value</span><span class='lbracket'>[</span><span class='int'>0</span><span class='rbracket'>]</span><span class='period'>.</span><span class='id identifier rubyid_value'>value</span><span class='rbracket'>]</span> <span class='rbrace'>}</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_raw_type3_msg'>raw_type3_msg</span> <span class='op'>=</span> <span class='id identifier rubyid_neg_token_init'>neg_token_init</span><span class='lbracket'>[</span><span class='int'>2</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_type3_msg'>type3_msg</span> <span class='op'>=</span> <span class='const'>Net</span><span class='op'>::</span><span class='const'>NTLM</span><span class='op'>::</span><span class='const'>Message</span><span class='period'>.</span><span class='id identifier rubyid_parse'>parse</span><span class='lparen'>(</span><span class='id identifier rubyid_raw_type3_msg'>raw_type3_msg</span><span class='rparen'>)</span>
<span class='kw'>if</span> <span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_flag'>flag</span> <span class='op'>&amp;</span> <span class='op'>::</span><span class='const'>RubySMB</span><span class='op'>::</span><span class='const'>Gss</span><span class='op'>::</span><span class='const'>Provider</span><span class='op'>::</span><span class='const'>NTLM</span><span class='op'>::</span><span class='const'>NEGOTIATE_FLAGS</span><span class='lbracket'>[</span><span class='symbol'>:UNICODE</span><span class='rbracket'>]</span> <span class='op'>==</span> <span class='op'>::</span><span class='const'>RubySMB</span><span class='op'>::</span><span class='const'>Gss</span><span class='op'>::</span><span class='const'>Provider</span><span class='op'>::</span><span class='const'>NTLM</span><span class='op'>::</span><span class='const'>NEGOTIATE_FLAGS</span><span class='lbracket'>[</span><span class='symbol'>:UNICODE</span><span class='rbracket'>]</span>
<span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_domain'>domain</span><span class='period'>.</span><span class='id identifier rubyid_force_encoding'>force_encoding</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>UTF-16LE</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_user'>user</span><span class='period'>.</span><span class='id identifier rubyid_force_encoding'>force_encoding</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>UTF-16LE</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_workstation'>workstation</span><span class='period'>.</span><span class='id identifier rubyid_force_encoding'>force_encoding</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_content'>UTF-16LE</span><span class='tstring_end'>&#39;</span></span><span class='rparen'>)</span>
<span class='id identifier rubyid_identity'>identity</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_domain'>domain</span><span class='period'>.</span><span class='id identifier rubyid_encode'>encode</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span><span class='period'>.</span><span class='id identifier rubyid_encoding'>encoding</span><span class='rparen'>)</span><span class='embexpr_end'>}</span><span class='tstring_content'>\\</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_user'>user</span><span class='period'>.</span><span class='id identifier rubyid_encode'>encode</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span><span class='period'>.</span><span class='id identifier rubyid_encoding'>encoding</span><span class='rparen'>)</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span>
<span class='kw'>else</span>
<span class='id identifier rubyid_identity'>identity</span> <span class='op'>=</span> <span class='kw'>nil</span>
<span class='kw'>end</span>
<span class='op'>::</span><span class='const'>RubySMB</span><span class='op'>::</span><span class='const'>Gss</span><span class='op'>::</span><span class='const'>Provider</span><span class='op'>::</span><span class='const'>Result</span><span class='period'>.</span><span class='id identifier rubyid_new'>new</span><span class='lparen'>(</span>
<span class='id identifier rubyid_parent_result'>parent_result</span><span class='period'>.</span><span class='id identifier rubyid_buffer'>buffer</span><span class='comma'>,</span>
<span class='id identifier rubyid_parent_result'>parent_result</span><span class='period'>.</span><span class='id identifier rubyid_nt_status'>nt_status</span><span class='comma'>,</span>
<span class='comment'># Note: The identity is overridden from the parent implementation
</span> <span class='comment'># as the parent class will not @account configuration for arbitrary users. It will now be set as domain\user
</span> <span class='id identifier rubyid_identity'>identity</span>
<span class='rparen'>)</span>
<span class='kw'>end</span></pre>
</td>
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</table>
</div>
<div class="method_details ">
<h3 class="signature " id="process_ntlm_type3-instance_method">
#<strong>process_ntlm_type3</strong>(type3_msg) &#x21d2; <tt>Object</tt>
</h3><table class="source_code">
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<pre class="code"><span class="info file"># File 'lib/msf/core/exploit/remote/smb/relay/provider/always_grant_access.rb', line 5</span>
<span class='kw'>def</span> <span class='id identifier rubyid_process_ntlm_type3'>process_ntlm_type3</span><span class='lparen'>(</span><span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='rparen'>)</span>
<span class='id identifier rubyid_dbg_string'>dbg_string</span> <span class='op'>=</span> <span class='tstring'><span class='tstring_beg'>&quot;</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_domain'>domain</span><span class='period'>.</span><span class='id identifier rubyid_encode'>encode</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span><span class='period'>.</span><span class='id identifier rubyid_encoding'>encoding</span><span class='rparen'>)</span><span class='embexpr_end'>}</span><span class='tstring_content'>\\</span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_type3_msg'>type3_msg</span><span class='period'>.</span><span class='id identifier rubyid_user'>user</span><span class='period'>.</span><span class='id identifier rubyid_encode'>encode</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&#39;</span><span class='tstring_end'>&#39;</span></span><span class='period'>.</span><span class='id identifier rubyid_encoding'>encoding</span><span class='rparen'>)</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span>
<span class='id identifier rubyid_logger'>logger</span><span class='period'>.</span><span class='id identifier rubyid_info'>info</span><span class='lparen'>(</span><span class='tstring'><span class='tstring_beg'>&quot;</span><span class='tstring_content'>NTLM authentication request overridden to succeed for </span><span class='embexpr_beg'>#{</span><span class='id identifier rubyid_dbg_string'>dbg_string</span><span class='embexpr_end'>}</span><span class='tstring_end'>&quot;</span></span><span class='rparen'>)</span>
<span class='comment'># Override the ntlm type3 validation as the current implementation of the
</span> <span class='comment'># parent class validates user accounts, and doesn&#39;t support logging in without valid creds
</span> <span class='op'>::</span><span class='const'>WindowsError</span><span class='op'>::</span><span class='const'>NTStatus</span><span class='op'>::</span><span class='const'>STATUS_SUCCESS</span>
<span class='kw'>end</span></pre>
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