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In Apache StreamPark versions from 2.0.0 to before 2.1.7, the system employs a flawed encryption mechanism where sensitive data is encrypted using weak keys derived directly from user passwords. This vulnerability arises because the secret key for encryption is not generated securely via cryptographic random functions but is instead based on user-provided passwords. Attackers can exploit this by examining the application code through reverse engineering or accessing leaked source code to understand the key derivation process. Since user passwords are often weak, predictable, or reused, attackers can perform brute-force or dictionary attacks to guess passwords and derive the encryption key. Additionally, if the application’s logic is exposed, attackers can directly compute keys from known passwords. Once the key is obtained, any encrypted data stored in databases or transmitted over networks can be decrypted, leading to unauthorized access to sensitive information such as credentials, configuration data, or personal details. This compromise breaks the confidentiality assurance of encryption, as the key strength ties to password security, which is inherently vulnerable. The issue is critical in environments where encrypted data is presumed secure, but the underlying key generation is weak, making decryption feasible for attackers with minimal effort.
Platform: Apache StreamPark
Version: 2.0.0-2.1.6
Vulnerability: Weak encryption key
Severity: High
date: Dec 12, 2025
Prediction: Patched in 2.1.7
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grep -r "password.key" /app/streampark/src/
find / -name ".jar" -exec jar tf {} \; | grep -i encrypt
java -cp streampark.jar org.example.KeyGenerator debug
Code snippet from vulnerable version:
String key = userPassword.substring(0, 16); // Weak key derivation
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes(), "AES"));
How Exploit:
Reverse engineer application jars.
Guess passwords via brute-force.
Decrypt data with derived keys.
Protection from this CVE
Upgrade to version 2.1.7.
Use secure random keys.
Audit encryption implementations.
Impact:
Sensitive data leakage.
Compromised confidentiality.
Potential system access.
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Sources:
Reported By: github.com
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