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.

Verbreitung

Mittel

3 Sprachen abgedeckt

Auswirkung

Mittel

Review empfohlen

Prävention

Dokumentiert

3 Fix-Beispiele

2 Prävention

So behebst du diese Schwachstelle

Präventionsstrategien für Integer Overflow basierend auf 3 Shoulder-Erkennungsregeln.

🐹 Go Alle anzeigen Go Details →

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 Alle anzeigen JavaScript Details →

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 Alle anzeigen Python Details →

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 Erkennung

Finden Sie Schwachstellen in Ihrem Code

Verwenden Sie Shoulder, um Ihren Code nach Integer Overflow or Wraparound-Mustern zu scannen. 3 Regeln.

Terminal

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

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

Erkennungsregeln (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 Warnzeichen

Worauf bei Code-Reviews zu achten ist

Diese Muster weisen auf potenzielle Integer Overflow or Wraparound-Schwachstellen hin. Achten Sie bei Code-Reviews und Sicherheitsaudits darauf.

🟡

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

🔵

potential integer overflow in numeric operations python-integer-overflow

🔍

Scanne deine Codebasis nach Integer Overflow or Wraparound

Shoulder CLI findet anfällige Muster in deiner gesamten Codebasis.

npx shoulder trust Alle Regeln durchsuchen