pikachu Over permission

Simple record

Horizontal override

Also known as horizontal override, it means different users with the same authority can access each other, for example, A and B are users with the same authority, if A can see what theoretically only B can seeinformation, or A can perform operations that theoretically only B can perform, this is horizontal overreach.

Topic presentation

Open the title to see, it is a login interface

Click on the prompt, find the login information for three accounts, log in to one of the accounts randomly and click to view personal information

You can find that Url can pass the username as a parameter, try to modify it to other username, and find that it can be echoed successfully, and the authority is successfully exceeded

reason

It only judges whether you are logged in and not using session to calibratetest

Checking the check_op_login function in function.php just judges whether ['op']['username'] or ['op']['password'] is defined
Check the code of the login page and find that all usernames will be defined after login ['op']['username'] and ['op']['password']

while inThe interface for viewing information only determines whether it is logged in and not which user it is

Vertical override

Also known as vertical override, it means that users with lower permissions can access users with higher permissions.For example, user A has lower authority than B. If A can access resources that theoretically only B can access, or perform operations that theoretically can only be performed by B, that is vertical override.

Topic presentation

pikachu user only has view permission

super user adminPermission to modify user information and add users

use adminThe user adds a new user test1, pay attention to the url at this time
Open another browser to log in to the ordinary user pikachu and try to directly copy the admin user's add user URL to add users (unauthorized access)

After adding the user as the ordinary user pikachu, I found that the login interface was returned, but re-login the user and check the user information to find that the user just added has been added successfully

Log in as pikachu user and capture packets and cookie values

Log in to the administrator account to add user test3, and capture packets together, replace the original cookie value with the pikachu user's cookie value, and re-Send package

You can see that there are two test3, one isThe test3 user added by the admin user, one is added by replaying the admin data package

reason

The

op2_login.php page judges the level of the logged-in users to determine which page they enter

op2_user.php only determines whether to log in

The check_op2_login function in the function is the same as check_op1_login, but only determines whether the variable is defined

op2_admin.php On this page, the login and level level judgments are made, so after logging in to the pikachu user, accessing the admin.php page will directly jump to the login page

The page for adding users op2_admin_edit.php only verifies whether the user is logged in, if not, it will jumpOn the login page, the user permission level is not verified, but the front end shows that adding a user is an operation that can only be performed by a user with a permission level of 1, so there is a vertical unauthorized vulnerability.

Reference article:
https://blog.csdn.net/elephantxiang/article/details/113480084
https://blog.csdn.net/qq_37077262/article/details/103025989