CVE-2017-9791 — AI Deep Analysis Summary

🚨 **Essence**: Apache Struts 2.1.x/2.3.x with the **Struts 1 Plugin** has an input validation error.…

🛡️ **Root Cause**: **Input Validation Error**. The framework fails to properly sanitize field values passed via `ActionMessage` in raw messages.…

🏢 **Vendor**: Apache Software Foundation. 📦 **Product**: Apache Struts 2. 📅 **Affected Versions**: **2.1.x** and **2.3.x** specifically when the **Struts 1 Plugin** is enabled. 🚫 Notably affects S2-048.

💻 **Privileges**: **Full Remote Code Execution**. 📂 **Data**: Attackers can execute arbitrary system commands. 🔓 **Impact**: Complete compromise of the server, data theft, or lateral movement. 🕵️‍♂️

🔓 **Threshold**: **LOW**. 🌐 **Auth**: No authentication required (Remote). ⚙️ **Config**: Only requires the Struts 1 plugin to be active. 🚀 **Ease**: Exploitable via HTTP headers (Content-Type manipulation).

🔥 **Public Exp**: **YES**. 📂 **PoCs**: Available on GitHub (e.g., `s2-048`, `Struts2-048`). 🛠️ **Tools**: Metasploit modules exist. 🌍 **Wild Exploitation**: High risk due to simple header-based exploitation. 📜

🔍 **Self-Check**: Scan for **Struts 1 Plugin** usage in 2.1.x/2.3.x versions. 📡 **Scanning**: Use Nuclei templates or Exploit-DB scripts. 🧪 **Test**: Send malicious `Content-Type` header with OGNL payload. 🚩

🛡️ **Official Fix**: **YES**. 📝 **Reference**: Apache Struts advisory S2-048. 🔄 **Action**: Upgrade to a patched version of Struts 2 (>= 2.3.32 or 2.5.10). 📦

🚧 **No Patch Workaround**: 🚫 **Disable** the Struts 1 Plugin if not needed. 🛑 **WAF**: Block requests with suspicious OGNL patterns in headers. 🧱 **Input Filtering**: Strictly validate multipart form data fields.

🔴 **Urgency**: **CRITICAL**. 🚨 **Priority**: **P1**. ⚡ **Reason**: Unauthenticated RCE, widely exploited, affects legacy systems. 🏃‍♂️ **Action**: Patch immediately or disable plugin.