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.

Rozpowszechnienie

Średnia

Pokryto 3 języków

Wplyw

Średni

Zalecany przegląd

Zapobieganie

Udokumentowane

3 przykładów poprawek

2 Zapobieganie

Jak naprawić tę podatność

Strategie zapobiegania dla Integer Overflow oparte na 3 regułach detekcji Shoulder.

🐹 Go Zobacz wszystko Go szczegóły →

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 Zobacz wszystko JavaScript szczegóły →

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 Zobacz wszystko Python szczegóły →

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 Wykrywanie

Znajdz podatnosci w swoim kodzie

Uzyj Shoulder do skanowania kodu w poszukiwaniu wzorcow Integer Overflow or Wraparound. 3 reguly.

terminal

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

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

Reguly Wykrywania (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 Sygnaly Ostrzegawcze

Na co zwracac uwage podczas przegladu kodu

Te wzorce wskazuja na potencjalne podatnosci Integer Overflow or Wraparound. Szukaj ich podczas przegladow kodu i audytow bezpieczenstwa.

🟡

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

🔵

potential integer overflow in numeric operations python-integer-overflow

🔍

Przeskanuj swój kod w poszukiwaniu Integer Overflow or Wraparound

Shoulder CLI znajduje podatne wzorce w całym Twoim kodzie.

npx shoulder trust Przeglądaj wszystkie reguły