VNX-391 – Unchecked Error Condition

Overview

VNX-391 maps to CWE-391: Unchecked Error Condition. Detects source patterns associated with CWE-391 (Unchecked Error Condition). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-391 | Languages: java, python

Why This Matters

This weakness class (Unchecked Error Condition) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-391 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 'catch(Exception e) {}' pattern
catch(Exception e) {}

// FLAGGED: contains 'except:' pattern
except:

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-391 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-391 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References