CTF-14解题思路

<div class="markdown-body editormd-preview-container" previewcontainer="true" style="padding: 20px;"><h2 id="h2--"><a name="源码分析：" class="reference-link"></a><span class="header-link octicon octicon-link"></span>源码分析：</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">highlight_file</span><span class="pun">(</span><span class="str">'index.php'</span><span class="pun">);</span></code></li><li class="L2"><code class="lang-php"><span class="pln">include</span><span class="pun">(</span><span class="str">'flag.php'</span><span class="pun">);</span></code></li><li class="L3"><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">$_GET</span><span class="pun">[</span><span class="str">'password'</span><span class="pun">]))</span><span class="pln"> </span></code></li><li class="L4"><code class="lang-php"><span class="pun">{</span></code></li><li class="L5"><code class="lang-php"><span class="pln">  </span><span class="com"># password必须只包含保护数字和字母</span></code></li><li class="L6"><code class="lang-php"><span class="pln">  </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">ereg </span><span class="pun">(</span><span class="str">"^[a-zA-Z0-9]+$"</span><span class="pun">,</span><span class="pln"> $_GET</span><span class="pun">[</span><span class="str">'password'</span><span class="pun">])</span><span class="pln"> </span><span class="pun">===</span><span class="pln"> FALSE</span><span class="pun">)</span></code></li><li class="L7"><code class="lang-php"><span class="pln">  </span><span class="pun">{</span></code></li><li class="L8"><code class="lang-php"><span class="pln">    echo </span><span class="str">'&lt;p&gt;You password must be alphanumeric&lt;/p&gt;'</span><span class="pun">;</span></code></li><li class="L9"><code class="lang-php"><span class="pln">  </span><span class="pun">}</span></code></li><li class="L0"><code class="lang-php"><span class="pln">  </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">strlen</span><span class="pun">(</span><span class="pln">$_GET</span><span class="pun">[</span><span class="str">'password'</span><span class="pun">])</span><span class="pln"> </span><span class="pun">&lt;</span><span class="pln"> </span><span class="lit">8</span><span class="pln"> </span><span class="pun">&amp;&amp;</span><span class="pln"> $_GET</span><span class="pun">[</span><span class="str">'password'</span><span class="pun">]</span><span class="pln"> </span><span class="pun">&gt;</span><span class="pln"> </span><span class="lit">9999999</span><span class="pun">)</span></code></li><li class="L1"><code class="lang-php"><span class="pln">   </span><span class="pun">{</span></code></li><li class="L2"><code class="lang-php"><span class="pln">     </span><span class="com"># 密码中必须包含*-*</span></code></li><li class="L3"><code class="lang-php"><span class="pln">     </span><span class="kwd">if</span><span class="pln"> </span><span class="pun">(</span><span class="pln">strpos </span><span class="pun">(</span><span class="pln">$_GET</span><span class="pun">[</span><span class="str">'password'</span><span class="pun">],</span><span class="pln"> </span><span class="str">'*-*'</span><span class="pun">)</span><span class="pln"> </span><span class="pun">!==</span><span class="pln"> FALSE</span><span class="pun">)</span><span class="pln"> </span><span class="com">//strpos — 查找字符串首次出现的位置</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">die</span><span class="pun">(</span><span class="str">'Flag: '</span><span class="pln"> </span><span class="pun">.</span><span class="pln"> $flag</span><span class="pun">);</span></code></li><li class="L6"><code class="lang-php"><span class="pln">      </span><span class="pun">}</span></code></li><li class="L7"><code class="lang-php"><span class="pln">      </span><span class="kwd">else</span></code></li><li class="L8"><code class="lang-php"><span class="pln">      </span><span class="pun">{</span></code></li><li class="L9"><code class="lang-php"><span class="pln">        echo</span><span class="pun">(</span><span class="str">'&lt;p&gt;*-* have not been found&lt;/p&gt;'</span><span class="pun">);</span><span class="pln"> </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></code></li><li class="L2"><code class="lang-php"><span class="pln">     </span><span class="kwd">else</span><span class="pln"> </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">        echo </span><span class="str">'&lt;p&gt;Invalid password&lt;/p&gt;'</span><span class="pun">;</span><span class="pln"> </span></code></li><li class="L5"><code class="lang-php"><span class="pln">      </span><span class="pun">}</span></code></li><li class="L6"><code class="lang-php"><span class="pln">   </span><span class="pun">}</span><span class="pln"> </span></code></li><li class="L7"><code class="lang-php"><span class="pun">?&gt;</span></code></li></ol></pre>
<p><strong>需要满足以下条件才能获取到flag<br>1、password必须只包含保护数字和字母，ereg正则且密码中要包含</strong></p>
<pre class="prettyprint linenums prettyprinted" style=""><ol class="linenums"><li class="L0"><code><span class="pun">*-*</span></code></li></ol></pre><p><strong>2、密码长度小于8</strong></p>
<p><strong>3、密码的值要大于9999999</strong></p>
<p><strong>分析</strong></p>
<p><strong>1、利用ereg%00绕过的特性 aaaa%00<em>-</em> 绕过1</strong></p>
<p><strong>2、利用科学计数法绕过2和3，最终答案1e9%00<em>-</em> ，刚好%00传到后台被解析为1个字符，总共7个字符。1e9=1000000000，满足&gt;9999999</strong></p>
<p><strong>其他：9999999设置的不够极限，还可以往后设置两位</strong></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">password</span><span class="pun">=</span><span class="lit">1e9</span><span class="pun">%</span><span class="lit">00</span><span class="pun">*-*</span></code></li></ol></pre></div>