Integer Overflow or Wraparound (CWE-190)

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value.

An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented with a given number of bits. This can lead to buffer overflows, incorrect financial calculations, or security bypasses.

Prévalence

Moyenne

3 langages couverts

Impact

Moyen

Revue recommandée

Prévention

Documentée

3 exemples de correctifs

2 Prévention

Comment corriger cette vulnérabilité

Stratégies de prévention pour Integer Overflow basées sur 3 règles de détection Shoulder.

🐹 Go Tout voir Go détails →

Integer Overflow via Unchecked Arithmetic MEDIUM

Validate bounds before arithmetic operations with user-controlled integers

+5 -1 go

  func handler(w http.ResponseWriter, r *http.Request) {
-     count, _ := strconv.Atoi(r.URL.Query().Get("count"))
+     count, err := strconv.Atoi(r.URL.Query().Get("count"))
+     if err != nil || count < 0 || count > 10000 {
+         http.Error(w, "Invalid count", 400)
+         return
+     }
      buffer := make([]byte, count*1024)
  }

🟨 JavaScript Tout voir JavaScript détails →

Integer Overflow via Unchecked Arithmetic MEDIUM

Validate numeric bounds before using user input in allocations or arithmetic

+5 -1 javascript

- const size = parseInt(req.query.size, 10);
+ const MAX_SIZE = 1024 * 1024;
+ const size = parseInt(req.query.size, 10);
+ if (isNaN(size) || size < 0 || size > MAX_SIZE) {
+   return res.status(400).json({ error: 'Invalid size' });
+ }
  const buffer = Buffer.alloc(size);

🐍 Python Tout voir Python détails →

Integer Overflow / Large Number Handling LOW

Validate numeric bounds before arithmetic operations on user input

+9 -7 python

- from flask import request
- 
- @app.route('/calculate')
- def calculate():
-     count = int(request.args.get('count'))
-     total = count * unit_price
-     return {'total': total}
+ from flask import request, jsonify
+ 
+ @app.route('/calculate')
+ def calculate():
+     count = int(request.args.get('count', 0))
+     if count < 0 or count > 10000:
+         return jsonify({'error': 'Invalid count'}), 400
+     total = count * unit_price
+     return jsonify({'total': total})

3 Détection

Trouvez les vulnérabilités dans votre code

Utilisez Shoulder pour scanner votre code à la recherche de patterns Integer Overflow or Wraparound. 3 règles.

terminal

# Scan with Shoulder CLI
npx @shoulderdev/cli trust --cwe=190

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

Règles de Détection (3)

🐹 Go 1 rules

Integer Overflow via Unchecked Arithmetic MEDIUM

User-controlled integer used in arithmetic or allocation without bounds checking.

🟨 Javascript 1 rules

Integer Overflow via Unchecked Arithmetic MEDIUM

Detects user-controlled values flowing into arithmetic operations without bounds checking. While JavaScript uses 64-bit floats for most numbers, integer overflow is still a concern in these scenarios: 1. TypedArrays (Uint8Array, Int32Array, etc.) - values wrap on overflow 2. Bitwise operations - convert to 32-bit signed integers 3. Large number arithmetic affecting security decisions 4. Array/Buffer allocation with user-controlled sizes Common vulnerable patterns: - Buffer allocation: Buffer.a

🔷 Typescript 1 rules

Integer Overflow via Unchecked Arithmetic MEDIUM

🐍 Python 1 rules

Integer Overflow / Large Number Handling LOW

Detects potential integer overflow in numeric operations.

4 Signes d'Alerte

Ce qu'il faut surveiller lors des revues de code

Ces patterns indiquent des vulnérabilités potentielles Integer Overflow or Wraparound. Recherchez-les lors des revues de code et des audits de sécurité.

🟡

user-controlled values flowing into arithmetic operations without bounds checking javascript-integer-overflow

🔵

potential integer overflow in numeric operations python-integer-overflow

🔍

Scannez votre base de code pour Integer Overflow or Wraparound

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

npx shoulder trust Parcourir toutes les règles