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LibcSearcher介绍.html
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LibcSearcher介绍
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<h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>LibcSearcher是针对pwn的python库，可以通过它寻找libc版本。<span id="more"></span></p>
<h1 id="安装"><a href="#安装" class="headerlink" title="安装"></a>安装</h1><figure class="highlight shell"><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></pre></td><td class="code"><pre><span class="line">git clone https://github.com/lieanu/LibcSearcher.git</span><br><span class="line">cd LibcSearcher</span><br><span class="line">python2 setup.py develop</span><br><span class="line">python3 setup.py develop</span><br></pre></td></tr></table></figure>
<h1 id="使用示例"><a href="#使用示例" class="headerlink" title="使用示例"></a>使用示例</h1><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></pre></td><td class="code"><pre><span class="line"><span class="keyword">from</span> LibcSearcher <span class="keyword">import</span> *</span><br><span class="line"></span><br><span class="line"><span class="comment">#第二个参数，为已泄露的实际地址,或最后12位(比如：d90)，int类型</span></span><br><span class="line">gets_real_addr = <span class="number">0X7ff39014bd90</span> <span class="comment"># gets 真实地址</span></span><br><span class="line">obj = LibcSearcher(<span class="string">"fgets"</span>, gets_real_addr)</span><br><span class="line"></span><br><span class="line"><span class="built_in">print</span> obj.dump(<span class="string">"system"</span>) <span class="comment"># system 偏移</span></span><br><span class="line"><span class="built_in">print</span> obj.dump(<span class="string">"str_bin_sh"</span>) <span class="comment"># /bin/sh 偏移</span></span><br><span class="line"><span class="built_in">print</span> obj.dump(<span class="string">"__libc_start_main_ret"</span>) </span><br><span class="line"></span><br><span class="line">libcbase = gets_real_addr – obj.dump(<span class="string">"fgets"</span>)</span><br><span class="line">system_addr = libcbase + obj.dump(<span class="string">"system"</span>) <span class="comment"># system 真实地址</span></span><br><span class="line">bin_sh_addr = libcbase + obj.dump(<span class="string">"str_bin_sh"</span>) <span class="comment"># /bin/sh 真实地址</span></span><br><span class="line"><span class="built_in">print</span> <span class="string">"system_addr"</span>,system_addr</span><br><span class="line"><span class="built_in">print</span> <span class="string">"bin_sh_addr"</span>,bin_sh_addr</span><br></pre></td></tr></table></figure>
<ul>
<li>如果遇到返回多个libc版本库的情况，可以通过<code>add_condition(leaked_func, leaked_address)</code>来添加限制条件，也可以手工选择其中一个libc版本。</li>
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<strong>本文作者： </strong>李钰璕
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<strong>版权声明： </strong>本博客所有文章除特别声明外，均采用 <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/zh-cn" rel="noopener" target="_blank"><i class="fab fa-fw fa-creative-commons"></i>BY-NC-SA</a> 许可协议。转载请注明出处！
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