In Liferay Portal 7.4.3.27 through 7.4.3.42, and Liferay DXP 2024.Q1.1 through 2024.Q1.20, 2023.Q4.0 through 2023.Q4.10, 2023.Q3.1 through 2023.Q3.10, 7.4 update 27 through update 42 (Liferay PaaS, and Liferay Self-Hosted), the Objects module does not restrict the use of Groovy scripts in Object actions for Admin Users. This allows remote authenticated admin users with the Instance Administrator role to execute arbitrary Groovy scripts (i.e., remote code execution) through Object actions.
In contrast, in Liferay DXP (Liferay SaaS), the use of Groovy in Object actions is not allowed due to the high security risks it poses.
Starting from Liferay DXP 2024.Q2 and later, a new feature has been introduced in Instance Settings that allows administrators to configure whether Groovy scripts are allowed in their instances.
Weakness
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
Potential Mitigations
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries.
- Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
- For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page.
- One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
References