CVE-2021-22053 — AI Deep Analysis Summary

🚨 **Essence**: A code injection flaw in VMware Spring Cloud Netflix. 📉 **Consequences**: Attackers can execute arbitrary code via the request URI path.…

🛡️ **CWE-94**: Improper Control of Generation of Code (Code Injection). 🐛 **Flaw**: The application evaluates path elements after `/hystrix/monitor` as SpringEL expressions.…

📦 **Product**: VMware Spring Cloud Netflix. 🎯 **Components**: Must use BOTH `spring-cloud-netflix-hystrix-dashboard` AND `spring-boot-starter-thymeleaf`. ⚠️ **Versions**: Prior to version 2.2.10 are susceptible. 📅

💻 **Privileges**: Full Remote Code Execution (RCE). 📂 **Data**: Complete control over the server process. Hackers can run system commands, steal data, or pivot to other systems. 🕵️‍♂️

🔓 **Auth**: Likely low/no auth required for the dashboard endpoint. ⚙️ **Config**: High if the specific combo of Hystrix Dashboard + Thymeleaf is present. If not configured, not vulnerable. 🧩

🔥 **Public Exp**: YES. Multiple PoCs exist on GitHub (e.g., SecCoder-Security-Lab, Vulnmachines). 🌐 **Wild Exploitation**: High risk. Nuclei templates are available for automated scanning. 🚀

🔍 **Check**: Look for `/hystrix/monitor;` in URLs. 📡 **Scan**: Use Nuclei templates or check for the specific dependency combination in `pom.xml`. 🛠️ **Feature**: If you see SpringEL evaluation errors, you might be hit.…

✅ **Fixed**: Yes. Upgrade to Spring Cloud Netflix version **2.2.10** or later. 📥 **Patch**: Official vendor patch available via VMware Tanzu. 🔄

🚧 **Workaround**: Remove `spring-boot-starter-thymeleaf` if not needed. 🚫 **Block**: Restrict access to `/hystrix/monitor` via WAF or firewall rules. 🛑

🔴 **Priority**: CRITICAL. 🚨 **Urgency**: Patch immediately. RCE is severe, and public exploits are widely available. Don't wait! ⏳