Unchecked Error Condition (CWE-391) - Security Vulnerability

Unchecked Error Condition

The product does not properly check when a function or operation returns a value that is associated with an error condition.

When error conditions are not checked, the application may continue with invalid or unexpected state, potentially leading to crashes, data corruption, or security vulnerabilities.

Prévalence

Moyenne

3 langages couverts

Impact

Élevé

1 règles de sévérité élevée

Prévention

Documentée

3 exemples de correctifs

2 Prévention

Comment corriger cette vulnérabilité

Stratégies de prévention pour Unchecked Error Condition basées sur 3 règles de détection Shoulder.

🐹 Go Tout voir Go détails →

Empty Error Handling LOW

Log or return errors instead of silently swallowing them

+2 -0 go

  _, err := db.Exec("DELETE FROM sessions WHERE expired = true")
  if err != nil {
+     log.Printf("session cleanup failed: %v", err)
+     return err
  }

🟨 JavaScript Tout voir JavaScript détails →

Unhandled Promise Rejection HIGH

Always handle promise rejections with .catch() or try/catch in async functions

+7 -2 javascript

  app.post('/create', async (req, res) => {
-   const user = await User.create(req.body);
-   res.json(user);
+   try {
+     const user = await User.create(req.body);
+     res.json(user);
+   } catch (error) {
+     logger.error('User creation failed:', error);
+     res.status(500).json({ error: 'Could not create user' });
+   }
  });

🐍 Python Tout voir Python détails →

Empty Exception Handler MEDIUM

Log exceptions or handle them explicitly instead of silently swallowing with pass

+11 -6 python

- def get_data():
-     try:
-         data = fetch_sensitive_data()
-         return {'data': data}
-     except:
-         pass
+ import logging
+ 
+ logger = logging.getLogger(__name__)
+ 
+ def get_data():
+     try:
+         data = fetch_sensitive_data()
+         return {'data': data}
+     except Exception as e:
+         logger.error(f"Failed to fetch data: {e}", exc_info=True)
+         return {'error': 'Data unavailable'}, 500

3 Détection

Trouvez les vulnérabilités dans votre code

Utilisez Shoulder pour scanner votre code à la recherche de patterns Unchecked Error Condition. 3 règles.

terminal

# Scan with Shoulder CLI
npx @shoulderdev/cli trust --cwe=391

# Or scan entire project
npx @shoulderdev/cli trust .

Règles de Détection (3)

🐹 Go 1 rules

Empty Error Handling LOW

Error check block is empty, silently swallowing errors.

🟨 Javascript 1 rules

Unhandled Promise Rejection HIGH

Detects promises that are created or called without proper rejection handlers. Unhandled promise rejections can cause application crashes, expose sensitive error information, and lead to inconsistent application state. In Node.js, unhandled promise rejections will terminate the process in future versions, making this a critical reliability and security issue.

🔷 Typescript 1 rules

Unhandled Promise Rejection HIGH

🐍 Python 1 rules

Empty Exception Handler MEDIUM

Detects empty except blocks that silently swallow exceptions. This can hide security-critical errors, authentication failures, or data validation issues.

4 Signes d'Alerte

Ce qu'il faut surveiller lors des revues de code

Ces patterns indiquent des vulnérabilités potentielles Unchecked Error Condition. Recherchez-les lors des revues de code et des audits de sécurité.

🟠

Promise at ... lacks rejection handler (.catch or try-catch) javascript-unhandled-promise-rejection

🟠

promises that are created or called without proper rejection handlers javascript-unhandled-promise-rejection

🟡

empty except blocks that silently swallow exceptions python-empty-except-block

🔍

Scannez votre base de code pour Unchecked Error Condition

Shoulder CLI trouve les motifs vulnérables dans toute votre base de code.

npx shoulder trust Parcourir toutes les règles