Improper Handling of Unicode Encoding
The product does not properly handle when an input contains Unicode encoding.
Unicode characters can have multiple encodings or representations. If an application does not properly handle Unicode, attackers may be able to bypass security filters or cause unexpected behavior using alternate encodings.
이 취약점을 수정하는 방법
3개의 Shoulder 탐지 규칙을 기반으로 한 Improper Handling of Unicode 예방 전략.
Normalize strings with NFKC before security-sensitive comparisons
- func handler(w http.ResponseWriter, r *http.Request) { - username := r.FormValue("username") - if username == "admin" { + import "golang.org/x/text/unicode/norm" + + func handler(w http.ResponseWriter, r *http.Request) { + username := r.FormValue("username") + normalized := norm.NFKC.String(strings.ToLower(username)) + if normalized == "admin" { grantAdminAccess() } }
Normalize Unicode strings with NFKC before security-sensitive comparisons
app.post('/login', (req, res) => { - if (req.body.username === 'admin') { + const username = req.body.username.normalize('NFKC').toLowerCase(); + if (username === 'admin') { return res.send('Admin access'); } });
Normalize Unicode strings with NFKC before comparison or security-critical operations
- def check_username(input_name, stored_name): - if input_name == stored_name: + import unicodedata + + def check_username(input_name, stored_name): + normalized_input = unicodedata.normalize('NFKC', input_name).lower() + normalized_stored = unicodedata.normalize('NFKC', stored_name).lower() + if normalized_input == normalized_stored: grant_access()
코드에서 취약점 찾기
Shoulder를 사용하여 코드에서 Improper Handling of Unicode Encoding 패턴을 스캔하세요. 3 규칙.
# Scan with Shoulder CLI npx @shoulderdev/cli trust --cwe=176 # Or scan entire project npx @shoulderdev/cli trust .
탐지 규칙 (3)
코드 리뷰에서 주의할 점
이 패턴은 잠재적인 Improper Handling of Unicode Encoding 취약점을 나타냅니다. 코드 리뷰와 보안 감사 중에 찾아보세요.
코드베이스를 스캔하세요: Improper Handling of Unicode Encoding
Shoulder CLI는 전체 코드베이스에서 취약한 패턴을 찾아냅니다.