CVE-2025-30065# CVE-2025-30065 ==> Dangerous Deserialization in Parquet-Avro 🔥
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### ⚠️ What’s the Risk?
* **Severity**: **10.0 (Critical ☠️)** on CVSS.
* **What it allows**: An attacker can craft a malicious Parquet file that embeds a custom Avro schema designed to trigger the instantiation of arbitrary Java classes.
* **Result**: Under certain conditions, this can lead to **remote code execution**.
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### 🔍 How is it exploited?
To exploit this vulnerability, the following conditions must be met:
1. Your application uses the `parquet-avro` library.
2. It processes a Parquet file with an embedded Avro schema.
3. The attacker’s target Java class exists on the application classpath.
4. There are no safeguards (e.g., allow-lists or class restrictions).
**Example**: A malicious file might trigger `javax.swing.JEditorPane`, which performs HTTP requests—potentially giving the attacker network access or triggering side effects.
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### 📂 Structure !
+ `ParquetExploitGenerator.java` – Generates a malicious Parquet file using a crafted Avro schema with default values that directly triggers instantiation of a standard Java class `(javax.swing.JEditorPane)`.
+ `PayloadRecord.java` – Payload class with a static initializer (legacy PoC component, now overwritten by the new logic).
+ `ParquetVictim.java` – Simulated victim application that reads the Parquet file and deserializes the Avro schema, triggering the payload under the right conditions.
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### 🏗️ Build & Run !
Use `CVE-2025-30065.sh` (included) to automate compilation, dependency resolution via Maven, and execution of the full chain.
***Requirements:***
+ Java 8+
+ Maven
```
sudo chmod +x CVE-2025-30065.sh
./CVE-2025-30065.sh
```
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### 🛠️ How to Protect Yourself
#### ✅ Immediate Action: **Update**
* Upgrade **Apache Parquet Java to version 1.15.1 or newer**.
* If you use packaged solutions like:
* **Cloudera**: Upgrade to **Data Warehouse 1.10.1-b703** or later.
* **IBM Db2**: Apply fix packs such as **11.1.4 FP7, 11.5.9, or 12.1.1**.
#### 🔒 Additional Mitigations
* **Enable class allow-lists**:
* Use `org.apache.parquet.avro.SERIALIZABLE_PACKAGES` and set it to only trusted packages (avoid `*`).
* Use `org.apache.avro.TRUSTED_PACKAGES` to restrict Avro schema behavior.
* **Block or scan Parquet files from untrusted sources**.
* **Test your pipeline** using PoC tools (like the F5 Canary exploit).
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### ❗ Is it being exploited in the wild?
* **No confirmed active exploitation yet**, but **public PoCs exist**, making it likely to be abused soon.
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### ✅ Quick Security Checklist
| Task | Status |
| ------------------------------------------- | ------ |
| Upgrade Apache Parquet to ≥ 1.15.1 | ✅ |
| Review Cloudera/Db2 or similar dependencies | ✅ |
| Restrict allowed Java packages | ✅ |
| Avoid ingesting untrusted Parquet files | ✅ |
| Run PoC or canary exploit tests | ✅ |
| Monitor system/network for anomalies | ✅ |
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### 🔒 **Disclaimer**
> This content is provided for **educational and informational purposes only**. The aim is to raise awareness about the security vulnerability **CVE-2025-30065** in Apache Parquet and promote safe practices in software development and deployment.
>
> **No part of this information is intended to encourage or support malicious activity, unauthorized access, or exploitation of systems.**
>
> Always ensure that you are authorized to test any system, and follow responsible disclosure and legal boundaries.
>
> The author(s) are not responsible for any misuse of the information presented.
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