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Improper Access Control allows unprivileged user to access customers duplicates list

Moderate
wisconaut published GHSA-c38c-c8mh-vq68 Jan 10, 2024

Package

composer pimcore/customer-data-framework (Composer)

Affected versions

<= 4.0.5

Patched versions

4.0.6

Description

Summary

An authenticated and unauthorized user can access the list of potential duplicate users and see their data.

Details

Permissions do not seem to be enforced when reaching the /admin/customermanagementframework/duplicates/list endpoint allowing an authenticated user without the permissions to access the endpoint and query the data available there. It seems that the access control is not enforced in this place :

customer-data-framework/src/Controller/Admin/DuplicatesController.php

Line 43 in b4af625

public function listAction(Request $request, DuplicatesIndexInterface $duplicatesIndex): Response

PoC

In order to reproduce the issue, the following steps can be followed :

  1. As an administrator :
    a. Create a role without any permission through Settings → User & Roles → Roles in the administration panel
    b. Create an user through Settings → User & Roles → Users and assign it the unprivileged role previously created
  2. Log out the current administrator and log in with this new user
  3. Access to the following endpoint https://pimcore_instance/admin/customermanagementframework/duplicates/list and the results will be returned to this unauthorized user

Impact

An unauthorized user can access PII data from customers without being authorized to.

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVE ID

CVE-2024-21666

Weaknesses