Broken access control explained

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broken access control: a deep dive with code examples

broken access control is a prevalent and dangerous web application security vulnerability. it occurs when users can access resources or perform actions they are not authorized to. in essence, the application fails to enforce proper restrictions on what authenticated (and sometimes unauthenticated) users are allowed to do. this can lead to data breaches, privilege escalation, and system compromise.

this tutorial will break down the concept of broken access control, explore different types, provide illustrative code examples (in python using flask and django), and discuss prevention strategies.

**i. understanding access control fundamentals**

before delving into broken access control, it's crucial to grasp the basic principles of access control:

* **authentication:** verifying the identity of a user. "are you who you claim to be?" this is typically done with usernames and passwords, multi-factor authentication, or other identity providers.
* **authorization:** determining what an authenticated user is allowed to do. "what resources can you access, and what actions can you perform?" this is where access control policies come into play.
* **principle of least privilege:** granting users only the minimum necessary access rights required to perform their job or function. this minimizes the potential damage if an account is compromised.

**ii. types of broken access control**

broken access control vulnerabilities manifest in various forms. here are some common examples:

1. **horizontal privilege escalation:**

* **definition:** a user gains access to resources belonging to another user with similar privileges. for example, user a can access user b's account details, orders, or files.
* **example scenario:** an e-commerce site allows users to view their order history by appending their order id to a url (e.g., `https://example.com/order/1234`). if the application doesn't properly verif ...

#BrokenAccessControl #CyberSecurity #WebApplicationSecurity

Broken access control
security vulnerabilities
web application security
authentication flaws
authorization weaknesses
access control mechanisms
data protection
security best practices
OWASP guidelines
user permissions
privilege escalation
security audits
risk management
compliance standards
cybersecurity threats

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