VNX-641 – Improper Restriction of Names for Files and Other Resources

Overview

VNX-641 maps to CWE-641: Improper Restriction of Names for Files and Other Resources. Detects source patterns associated with CWE-641 (Improper Restriction of Names for Files and Other Resources). Each finding should be manually reviewed for exploitability in context.

Severity: Low | CWE: CWE-641 | Languages: java, node, python

Why This Matters

This weakness class (Improper Restriction of Names for Files and Other Resources) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-641 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 'filename.split(".")[-1]' pattern
filename.split(".")[-1]

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-641 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-641 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References