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CVE-2021-26117</h1><div id="post-meta"><div class="meta-firstline"><span class="post-meta-date"><i class="far fa-calendar-alt fa-fw post-meta-icon"></i><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2021-10-29T01:36:16.000Z" title="发表于 2021-10-29 09:36:16">2021-10-29</time><span class="post-meta-separator">|</span><i class="fas fa-history fa-fw post-meta-icon"></i><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2021-11-02T05:57:55.209Z" title="更新于 2021-11-02 13:57:55">2021-11-02</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/">漏洞利用</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/Web%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%BC%8F%E6%B4%9E/">Web服务器漏洞</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/%E5%B8%B8%E8%A7%84%E6%BC%8F%E6%B4%9E/">常规漏洞</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/Web%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%BC%8F%E6%B4%9E/Apache/">Apache</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/%E5%B8%B8%E8%A7%84%E6%BC%8F%E6%B4%9E/%E6%9C%AA%E6%8E%88%E6%9D%83%E8%AE%BF%E9%97%AE%E6%BC%8F%E6%B4%9E/">未授权访问漏洞</a><i class="fas fa-angle-right post-meta-separator"></i><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E6%BC%8F%E6%B4%9E%E5%88%A9%E7%94%A8/Web%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%BC%8F%E6%B4%9E/Apache/ActiveMQ/">ActiveMQ</a></span></div><div class="meta-secondline"><span class="post-meta-separator">|</span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span class="post-meta-label">字数总计:</span><span class="word-count">586</span><span class="post-meta-separator">|</span><i class="far fa-clock fa-fw post-meta-icon"></i><span class="post-meta-label">阅读时长:</span><span>2分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv" id="" data-flag-title="Apache ActiveMQ 未授权访问漏洞 - CVE-2021-26117"><i class="far fa-eye fa-fw post-meta-icon"></i><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"></span></span></div></div></div></header><main class="layout" id="content-inner"><div id="post"><article class="post-content" id="article-container"><h2 id="简介"><a href="#简介" class="headerlink" title="简介"></a>简介</h2><p>ActiveMQ 是 Apache 研发的开源消息服务器，它支持Java消息服务、集群、Spring Framework等。</p>
<p>ActiveMQ 是一个完全支持JMS1.1和J2EE 1.4规范的 JMS Provider实现</p>
<p>随着中间件的启动，会打开两个端口，61616是工作端口，消息在这个端口进行传递；8161是Web管理页面端口</p>
<p>ActiveMQ的web控制台分三个应用，admin、api和fileserver</p>
<p>其中admin是管理员页面，api是接口，fileserver是储存文件的接口。</p>
<p>admin和api都需要登录后才能访问，fileserver无需登录</p>
<h2 id="漏洞原理"><a href="#漏洞原理" class="headerlink" title="漏洞原理"></a>漏洞原理</h2><p>默认情况下，ActiveMQ服务是没有配置安全参数。恶意人员可以利用默认配置弱点发动远程命令执行攻击，获取服务器权限，从而导致数据泄露</p>
<h2 id="影响版本"><a href="#影响版本" class="headerlink" title="影响版本"></a>影响版本</h2><ul>
<li>Apache ActiveMQ Artemis < 2.16.0</li>
<li>Apache ActiveMQ < 5.16.1</li>
<li>Apache ActiveMQ < 5.15.14</li>
</ul>
<h2 id="环境复现"><a href="#环境复现" class="headerlink" title="环境复现"></a>环境复现</h2><p>下载地址：<a target="_blank" rel="noopener" href="http://activemq.apache.org/components/classic/download/">http://activemq.apache.org/components/classic/download/</a></p>
<p>解压文件夹</p>
<p>启动</p>
<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">ActiveMQ/bin/ActiveMQ.bat</span><br><span class="line"></span><br><span class="line">cd ActiveMQ/bin/</span><br><span class="line">./ActiveMQ start</span><br></pre></td></tr></table></figure>
<p>访问</p>
<figure class="highlight http"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">http://127.0.0.1:8161/admin/</span><br></pre></td></tr></table></figure>
<h2 id="漏洞特征"><a href="#漏洞特征" class="headerlink" title="漏洞特征"></a>漏洞特征</h2><p>端口：61616（工作端口），8161（Web端口）</p>
<p>ActiveMQ LDAP登录模块可被配置为使用匿名访问。在这种情况下，远程攻击者在只提供有效的用户名时，无需提供密码，可造成LDAP未授权访问</p>
<h2 id="漏洞利用"><a href="#漏洞利用" class="headerlink" title="漏洞利用"></a>漏洞利用</h2><p>遍历用户名，通过匿名访问的方式登录</p>
<p>ActiveMQ默认开启PUT请求，当开启PUT时，访问不存在的目录，Response会返回相应的物理路径信息</p>
<p>如果存在未授权或默认口令，以下页面同样可以获取到物理路径</p>
<figure class="highlight http"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">http://127.0.0.1:8161/admin/test/systemProperties.jsp</span><br></pre></td></tr></table></figure>
<p>在 ActiveMQ 5.12.x~5.13.x 版本中，默认关闭 fileserver 目录，可以在<code>conf/jetty.xml</code>中开启；</p>
<p>在5.14.0版本以后，彻底删除了fileserver应用</p>
<p>若服务器存在 fileserver 目录，则可以通过 PUT 请求写入文件</p>
<p>返回204说明上传成功，返回404或者500说明上传失败</p>
<p>但 fileserver 下的文件默认不解析，通过MOVE方法请求移动文件</p>
<p>把文件移动到可以被解析的<code>admin/</code>下或者<code>api/</code>下</p>
<figure class="highlight http"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">MOVE</span> <span class="string">/fileserver/1.txt</span> <span class="meta">HTTP/1.1</span></span><br><span class="line"><span class="attribute">Destination</span><span class="punctuation">: </span>file:///opt/activemq/webapps/admin/shell.jsp</span><br></pre></td></tr></table></figure>
<h2 id="防御措施"><a href="#防御措施" class="headerlink" title="防御措施"></a>防御措施</h2><ol>
<li>将 Apache ActiveMQ 升级为最新版本</li>
<li>禁止在 LDAP 配置中使用匿名绑定</li>
</ol>
</article><div class="post-copyright"><div class="post-copyright__author"><span class="post-copyright-meta">文章作者: </span><span class="post-copyright-info"><a href="mailto:undefined">BaiKer</a></span></div><div class="post-copyright__type"><span class="post-copyright-meta">文章链接: </span><span class="post-copyright-info"><a href="http://baiker.top/8ead4fcca5cb.html">http://baiker.top/8ead4fcca5cb.html</a></span></div><div class="post-copyright__notice"><span class="post-copyright-meta">版权声明: </span><span class="post-copyright-info">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/" target="_blank">CC BY-NC-SA 4.0</a> 许可协议。转载请注明来自 <a href="http://baiker.top" target="_blank">BaiKer</a>！</span></div></div><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/%E6%9C%AA%E6%8E%88%E6%9D%83%E8%AE%BF%E9%97%AE%E6%BC%8F%E6%B4%9E/">未授权访问漏洞</a></div><div class="post_share"><div class="social-share" data-image="https://baiker.top/img/wallhaven-gj977q.png" data-sites="facebook,twitter,wechat,weibo,qq"></div><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/social-share.js/dist/css/share.min.css" media="print" onload="this.media='all'"><script src="https://cdn.jsdelivr.net/npm/social-share.js/dist/js/social-share.min.js" defer></script></div></div><nav class="pagination-post" id="pagination"><div class="prev-post pull-left"><a href="/209eabddaf61.html"><img class="prev-cover" src="https://baiker.top/img/wallhaven-gj977q.png" onerror="onerror=null;src='/img/404.jpg'" alt="cover of previous post"><div class="pagination-info"><div class="label">上一篇</div><div class="prev_info">Apache ActiveMQ 未授权访问&弱口令漏洞</div></div></a></div><div class="next-post pull-right"><a href="/c6e96e4efcf5.html"><img class="next-cover" src="https://baiker.top/img/wallhaven-gj977q.png" onerror="onerror=null;src='/img/404.jpg'" alt="cover of next post"><div class="pagination-info"><div class="label">下一篇</div><div class="next_info">文件包含漏洞</div></div></a></div></nav><div class="relatedPosts"><div class="headline"><i class="fas fa-thumbs-up fa-fw"></i><span>相关推荐</span></div><div class="relatedPosts-list"><div><a href="/a5e49e0e2f90.html" title="Atlassian Crowd 未授权访问漏洞 - 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