Weak Authentication Methods

Check List

Methodology

Black Box

Authentication Weakness

1

Create an account or change the password to evaluate the password policy

2

Test simple passwords (only numbers, only letters, short passwords, common ones like 123456) and check whether they are accepted

3

Identify the minimum and maximum password length by testing very short and very long passwords

4

Try using the username or personal information inside the password and observe the result.

5

Change the password multiple times and attempt to reuse a previous password

6

Perform multiple failed login attempts and check whether account lockout or rate limiting is enforced

7

If alternative factors such as PIN or security questions exist, test whether they are guessable or vulnerable to brute force

8

Finally, determine whether weaknesses exist in password complexity, password reuse protection, or brute-force protection


White Box

Cheat Sheet

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