VNX-1123 – Excessive Use of Self-Modifying Code

Overview

VNX-1123 maps to CWE-1123: Excessive Use of Self-Modifying Code. Detects source patterns associated with CWE-1123 (Excessive Use of Self-Modifying Code). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-1123 | Languages: python

Why This Matters

This weakness class (Excessive Use of Self-Modifying Code) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-1123 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 'exec(compile(' pattern
exec(compile(

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-1123 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-1123 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References