关联漏洞
标题：
Spring Framework 代码注入漏洞
(CVE-2022-22965)
描述：Spring Framework是美国Spring团队的一套开源的Java、JavaEE应用程序框架。该框架可帮助开发人员构建高质量的应用。 Spring Framework 存在代码注入漏洞，该漏洞源于 JDK 9+ 上的数据绑定的 RCE。以下产品和版本受到影响：5.3.0 至 5.3.17、5.2.0 至 5.2.19、较旧的和不受支持的版本也会受到影响。
描述
🔒 Spring4Shell Firewall Defense — Cybersecurity Incident Simulation This project is part of a Cybersecurity Job Simulation I completed in August 2025 through Forage. It focuses on detecting, analyzing, and mitigating a simulated real-world cyberattack involving the Spring4Shell (CVE-2022-22965) vulnerability
介绍
🛡️ Spring4Shell Firewall Defense – Cybersecurity Incident Simulation
This project is part of a Cybersecurity Job Simulation I completed through Forage in August 2025. It simulates a real-world incident involving the Spring4Shell (CVE-2022-22965) vulnerability and demonstrates how a custom firewall can detect and mitigate exploitation attempts.
📌 Project Overview
The goal of this simulation was to identify and block malicious traffic targeting a vulnerable web application endpoint. I developed a custom Python-based HTTP firewall that monitors and filters incoming requests, detecting known exploit patterns and stopping them in real time.
🧰 Key Features
🔍 Threat Detection: Analyzes HTTP POST data for suspicious keys and payloads.
🔐 Firewall Defense: Blocks malicious requests using pattern-based rules.
💣 Exploit Prevention: Detects attempted remote code execution via Runtime.getRuntime() and similar signatures.
📈 Logging & Monitoring: Displays blocked attempts and reasons for blocking in the terminal.
🖼️ Demo
In the first screenshot, a suspicious POST request attempts to exploit the Spring4Shell vulnerability by injecting a payload with Runtime.getRuntime(). The custom firewall immediately detects this pattern and blocks the request, returning a 403 Forbidden response — effectively stopping a potential Remote Code Execution (RCE) attempt.
In contrast, the second screenshot shows a safe POST request with harmless data (username=test) sent to the server. The firewall recognizes it as safe and allows the request to pass through, returning a standard 200 OK response. This highlights the firewall’s ability to distinguish between normal and malicious activity with precision.
🧪 Technologies Used
Python (firewall implementation)
http.server module for simulating vulnerable server
curl for simulating POST requests
Custom signature detection logic
📋 What I Did
Analyzed a simulated Spring4Shell attack targeting a JSP endpoint.
Identified suspicious payloads in POST data.
Wrote a custom firewall (firewall_server.py) to detect and block malicious requests.
Validated the firewall by simulating attacks (see screenshot).
Documented the incident with a detailed postmortem analysis.
📜 Certificate
[RNhbu8QnDzthwynEf_M6JGAwZ52SMusMEcK_cKqCaSyzkPoWXRdg5_1754434963290_completion_certificate.pdf](https://github.com/user-attachments/files/21616808/RNhbu8QnDzthwynEf_M6JGAwZ52SMusMEcK_cKqCaSyzkPoWXRdg5_1754434963290_completion_certificate.pdf)
文件快照
[4.0K] /data/pocs/a965d084802d0e5ec6c5e8455a03dc733257161c
├── [2.0K] firewall code
├── [1.0K] LICENSE
├── [ 16K] Postmortem .docx
└── [2.7K] README.md
0 directories, 4 files
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