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Last active January 6, 2025 04:46
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Authentication Bypass Vulnerability


Description

An Authentication Bypass vulnerability was discovered in the Oqtane Framework, version 6.0.0. The vulnerability allows unauthorized access to sensitive user information by exploiting the entityid parameter in the /api/Setting endpoint. This issue arises due to insufficient server-side validation of authentication and authorization, enabling attackers to retrieve sensitive user details or escalate privileges.


Details

The /api/Setting endpoint fails to enforce adequate access control mechanisms. Specifically, it does not validate user authentication and authorization, allowing attackers to manipulate the entityid parameter to access restricted data or perform unauthorized actions.

  • Affected Version:
    Oqtane Framework Version 6.0.0

  • Affected Endpoint:
    /api/Setting?entityname=User&entityid=<ID>

  • Vulnerable Parameter:
    entityid

By exploiting this vulnerability, attackers can bypass authentication, retrieve sensitive data of any user, and escalate their privileges. This is due to the application's reliance on client-side data for authentication instead of enforcing robust server-side validation.


Steps to Reproduce

  1. Start the Application
    Launch the application and log in as any valid user.

  2. Navigate to the Profile Section
    Access the user profile section to observe normal application behavior.

  3. Send a GET Request with Valid Authentication
    Use the following example to fetch user data (e.g., User Kaushik's data):

    GET http://localhost:5000/api/Setting?entityname=User&entityid=4
  4. Remove Authentication Cookies
    Clear all authentication cookies and session tokens.

  5. Modify the entityid Parameter
    Bypass authentication by changing the entityid parameter to access data of other users or escalate privileges:

    GET http://localhost:5000/api/Setting?entityname=User&entityid=1

    Examples:

    • Change entityid=1 to entityid=2 or entityid=3.
    • Continue modifying the parameter to retrieve additional user information.
  6. Observe the Server Response
    Despite the lack of valid authentication, sensitive user details are disclosed.


Impact

  • Impact on Users:

    • Unauthorized disclosure of sensitive personal information.
  • Impact on the Application:

    • Increased risk of data breaches, privacy violations, and regulatory non-compliance.
    • Potential reputational damage and loss of user trust.

Recommendations

  • Enforce Robust Authentication and Authorization:
    Implement server-side validation to verify the authentication state of the requesting user.

  • Implement Role-Based Access Controls (RBAC):
    Restrict access to sensitive data based on the user’s roles and permissions.

  • Sanitize and Validate Input Parameters:
    Validate all input parameters, especially the entityid parameter, to ensure they are legitimate and authorized for the requesting user.

  • Audit Logs and Monitoring:
    Implement logging and monitoring mechanisms to detect and prevent unauthorized access attempts.

For more details about the patch, refer to:
OWASP: Broken Access Control


Special thanks to Parth Padhiyar for the contributions in identifying and addressing this vulnerability.

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