VNX-1204 – Generation of Weak Initialization Vector (IV)

Overview

VNX-1204 maps to CWE-1204: Generation of Weak Initialization Vector (IV). Detects source patterns associated with CWE-1204 (Generation of Weak Initialization Vector (IV)). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-1204 | Languages: java

Why This Matters

This weakness class (Generation of Weak Initialization Vector (IV)) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-1204 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 'byte[] iv = new byte[16]' pattern
byte[] iv = new byte[16]

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-1204 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-1204 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References