Business Logic
Business logic API attacks refer to a type of security threat where an attacker exploits vulnerabilities in the underlying logic of an API to achieve unauthorized access or manipulate data within a business application.
In most cases Business logic issues happen when authorization is not enforced through all the flows of the application. Modern applications usually assign a non guessable identifiers to users and resources.
Consider the following example:
def get_profile(self, getprofile_request, context):
cursor, conn = connection_to_sql(f"GET_PROFILE_BL {getprofile_request}")
cursor.execute('select * from profiles where uid=?',(getprofile_request.uid,))
p = cursor.fetchone()
The function get_profile accepts the User ID as uid and directly querying the database to get this user's profile without any validation that the logged in user is the same user that is represented by the uid.
Ensure that only authorized users can access the API and that access is granted on a need-to-know basis. Use strong authentication methods such as multi-factor authentication and implement authorization checks at the API endpoint level.
These test cases test the enforce of authorization between user identifiers, resource identifiers and the actual logged in users on APIs that read user related data
Test case | OWASP | CWE |
|---|---|---|
[BL001] User data leakage to other users - Resource-ID authorization | ||
[BL002] User data leakage to other users - User-ID authorization | ||
[BL003] User data leakage to other users - Resource-ID and User-ID authorization | ||
[BL004] User data leakage to other users - credentials authorization |
These test cases test the enforce of authorization between user identifiers, resource identifiers and the actual logged in users on APIs that write user related data
Test case | OWASP | CWE |
|---|---|---|
[BL005] User data manipulation by other users - Resource-ID authorization | ||
[BL006] User data manipulation by other users - User-ID authorization | ||
[BL007] User data manipulation by other users - Resource-ID and User-ID authorization | ||
[BL008] User data manipulation by other users - credentials authorization |
This test case try to guess values of user Identifiers with a numeric structure
Test case | OWASP | CWE |
|---|---|---|
[BL009] Guessable resource identifier | |
Last modified 3mo ago