High severityC#CryptographyHIGH confidence
ECB Mode
A block cipher is used in ECB mode (or with a null IV), which encrypts identical plaintext blocks to identical ciphertext and leaks structure (CWE-327).
Standards mapping
- OWASP Top 10
- A02:2021 - Cryptographic Failures
- OWASP ASVS
- V6.2.2 (L2)
Vulnerable vs. safe
Flagged by this check
alg.Mode = CipherMode.ECB;Passes - the safe pattern
alg.Mode = CipherMode.CBC;Why it matters & how to fix it
A block cipher is used in ECB mode (or with a null IV), which encrypts identical plaintext blocks to identical ciphertext and leaks structure (CWE-327). Use an authenticated mode (AES-GCM) or CBC with a random, per-message IV, and prefer AesGcm/AesCcm over manual mode selection.
References
Rule ID integsec.csharp.crypto.ecb-mode - engine: Opengrep - license: MIT - Copyright (c) IntegSec Inc.
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