VNX-323 – Reusing a Nonce, Key Pair in Encryption

Overview

VNX-323 maps to CWE-323: Reusing a Nonce, Key Pair in Encryption. Detects source patterns associated with CWE-323 (Reusing a Nonce, Key Pair in Encryption). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-323 | Languages: go, java, node, python

Why This Matters

This weakness class (Reusing a Nonce, Key Pair in Encryption) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-323 and surfaces them for review. Each finding should be evaluated in context — the rule catches the pattern, not the context.

What Gets Flagged

// FLAGGED: contains 'nonce = ' pattern
nonce =

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-323 or a false positive.
  2. Replace the flagged construct with a documented safe alternative appropriate to your language and framework.
  3. For confirmed false positives, add a # vulnetix-ignore: VNX-323 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References