VNX-343 – Predictable Value Range from Previous Values

Overview

VNX-343 maps to CWE-343: Predictable Value Range from Previous Values. Detects source patterns associated with CWE-343 (Predictable Value Range from Previous Values). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-343 | Languages: python

Why This Matters

This weakness class (Predictable Value Range from Previous Values) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-343 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 'random.seed(' pattern
random.seed(

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-343 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-343 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References