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The vulnerability in Apache StreamPark stems from the use of AES encryption in ECB (Electronic Codebook) mode combined with a weak random number generator for handling sensitive data, including JWT tokens. ECB mode encrypts identical plaintext blocks into identical ciphertext blocks without an initialization vector, revealing patterns in the data. This lack of diffusion allows attackers to analyze ciphertext and potentially deduce plaintext contents, especially in structured data like tokens. The weak random number generator exacerbates the risk by producing predictable encryption keys or nonces, making cryptographic operations vulnerable to brute-force or statistical attacks. When applied to JWT tokens, which often carry authentication claims, these flaws can lead to token decryption, forging, or session hijacking. Attackers could intercept encrypted tokens, observe repetitions, and use known plaintext-ciphertext pairs to recover key material or directly decrypt sensitive information. This compromise in confidentiality and integrity exposes user authentication data, enabling unauthorized access to systems leveraging StreamPark for data processing workflows.
Platform: Apache StreamPark
Version: 2.0.0 to 2.1.6
Vulnerability: Weak Encryption Algorithm
Severity: High
date: 2025-12-12
Prediction: Patch 2025-12-12
What Undercode Say:
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grep -r "AES/ECB|Cipher.getInstance" src/ openssl rand -hex 32 cat /dev/urandom | od -t x1 | head -n 5
How Exploit:
Analyze ciphertext patterns from tokens.
Brute-force weak RNG outputs.
Decrypt tokens via ECB vulnerabilities.
Protection from this CVE
Upgrade to version 2.1.7.
Use AES-GCM or CBC mode.
Implement strong random generators.
Impact:
Sensitive authentication data exposure.
Potential unauthorized access risks.
JWT token compromise possible.
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Sources:
Reported By: github.com
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