Need

Implementation of a strong credential policy, including password expiration, strength requirements, and secure temporary password generation

Context

Description

// --- Weak credential policy ---
package main

import (
	"github.com/gin-gonic/gin"
	"net/http"
)
...

**Weak credential policy:** This is a simple web server written in Go using the Gin framework. The server has a `/login` endpoint that accepts POST requests. The request handler for this endpoint retrieves the `username` and `password` from the form data of the request. The vulnerability lies in the credential policy. The server checks if the `username` is "admin" and the `password` is "1234". If the credentials match, it responds with a status of 200 (OK) and a JSON message saying "You are logged in". Otherwise, it responds with a status of 401 (Unauthorized) and a JSON message saying "Unauthorized". However, this approach to handling credentials is weak and does not comply with security regulations for the following reasons: 1. **Hardcoded credentials**: The credentials are hardcoded into the application. This means that if the source code is exposed, the credentials are also exposed. It also means that the credentials cannot be changed without updating the source code. 2. **Weak password**: The password "1234" is weak and can be easily guessed or cracked using brute force methods. 3. **Lack of encryption**: The password is stored and transmitted in plaintext. This means that if the communication between the client and the server is intercepted, the password can be easily read. 4. **Lack of account lockout policy**: There is no account lockout policy in place. This means that an attacker can make unlimited attempts to guess the password without being locked out. 5. **Lack of password complexity requirements**: There are no requirements for password complexity. This means that users are not required to create strong passwords that include a mix of uppercase letters, lowercase letters, numbers, and special characters. **Password expiration:** This code snippet is a simple Go application using the Gin framework. It includes an endpoint (`/awsPolicy`) which returns the AWS IAM password policy for the account. The vulnerability lies in the `GetAccountPasswordPolicy` function. This function retrieves the account password policy, including whether password expiration is enabled or not. If the `EnablePasswordExpiration` flag in the returned `PasswordPolicy` object is `false`, this means that the password expiration is not enabled, which is a security risk. Good security practices suggest that credentials should be renewed every 90 days. Without automatic password expiration, old and potentially compromised passwords can continue to be used, increasing the risk of unauthorized access. To fix this vulnerability, the `EnablePasswordExpiration` flag should be set to `true`, and the `MaxPasswordAge` should be set to `90` (for 90 days) in the AWS IAM policy. **Password strength:** The above code represents a simple login endpoint in a Go backend application using the Gin framework. The endpoint accepts a POST request with a username and password. The vulnerability lies in the password validation. Currently, the code only checks if the username and password fields are not empty. This means that any non-empty password is accepted. There are no checks for password length, complexity, or common patterns. This is a weak credential policy, which makes the system more susceptible to brute force attacks. A strong password policy should enforce rules such as minimum length, a mix of upper and lower case letters, inclusion of numbers and special characters, and not matching common patterns or easily guessable passwords. **Temporary passwords:** The above code represents a password reset endpoint in a Go backend application using the Gin framework. The vulnerability lies in the `/reset_password` endpoint. When a POST request is made to this endpoint, the application accepts a temporary password from the user in the `tempPassword` variable and uses it to reset the password. The problem here is that there are no security policies in place for the temporary password. It could be any string the user chooses. This means the temporary password could be weak, easy to guess, or brute-force, thereby making the user's account susceptible to unauthorized access. In a real-world scenario, an attacker could exploit this vulnerability by guessing or brute-forcing the temporary password, leading to potential unauthorized access to the user's account. This is a serious security issue as it directly compromises the privacy and integrity of the user's data. To mitigate this vulnerability, the application should enforce a strong credential policy for temporary passwords. This can include a minimum length, requiring a mix of uppercase and lowercase letters, numbers, and special characters, and not allowing common or easily guessable passwords.

// --- Weak credential policy ---
package main

import (
	"github.com/gin-gonic/gin"
	"golang.org/x/crypto/bcrypt"
	"net/http"
)...

**Weak credential policy:** The updated code now includes a strong password policy and secure password storage. The password is no longer a weak "1234", but a strong password "StrongPassword123!" that meets complexity requirements. The password is stored securely using the bcrypt hashing algorithm. The bcrypt algorithm is a key factor here. It's a password-hashing function designed to be computationally intensive to use, to slow down brute force or rainbow table attacks. In the login function, the provided password is compared with the stored hashed password using `bcrypt.CompareHashAndPassword`. This function securely compares the provided password with the hashed password and returns an error if they do not match. Please note that this is a basic example and does not include all recommended security measures such as multi-factor authentication, account lockout mechanisms, and user education. These should also be implemented in a production environment to further enhance security. **Password expiration:** The updated code now includes a call to `UpdateAccountPasswordPolicy` to set the password policy for the AWS account. The policy is set to: - Allow users to change their password - Enforce password expiration (hard expiry) - Set the maximum password age to 90 days - Set the minimum password length to 8 characters - Prevent password reuse for the last 5 passwords - Require at least one symbol, number, uppercase character, and lowercase character in the password If there is an error while setting the password policy, the error is returned as a JSON response with a status code of 500 (Internal Server Error). After setting the password policy, the code retrieves the current password policy using `GetAccountPasswordPolicy` and returns it as a JSON response. If there is an error while retrieving the password policy, the error is returned as a JSON response with a status code of 500 (Internal Server Error). **Password strength:** The updated code now includes a strong password policy. This policy is enforced by a regular expression that checks if the password meets the following criteria: - At least 8 characters long - Includes at least one uppercase letter - Includes at least one lowercase letter - Includes at least one number - Includes at least one special character The `regexp.MatchString` function is used to check if the password matches the regular expression. If the password does not meet these criteria, the server will respond with a "Bad request" message. This ensures that only passwords that meet the strong password policy are accepted by the system. Please note that this is a basic implementation and does not include additional security measures such as password expiration and account lockout after multiple failed login attempts. For a production system, consider implementing these additional measures to further enhance the security of your application. **Temporary passwords:** The updated code includes a function to generate a temporary password that is randomly generated and not easily guessable. The `generateTempPassword` function generates a random string of a specified length. This string is then hashed using the bcrypt algorithm, which is a secure password hashing algorithm. The temporary password is then used in the password reset logic. The hashed password should be stored, not the plain text temporary password. Also, an expiration time for the temporary password should be stored to ensure that the temporary password expires after a certain period of time. The constant `minPasswordLength` is used to enforce a minimum password length. The `expirationTime` constant is used to set the expiration time for the temporary password. This code does not include the mechanism for users to change their temporary password to a permanent one. This would need to be implemented in the password reset logic. Finally, it's important to educate users about the importance of choosing strong passwords and the risks of using temporary passwords. This could be done through user interface messages, documentation, or other forms of communication.

References