CVE-2021-29052 : Vulnerability Insights and Analysis

The Data Engine module in Liferay Portal 7.3.0 through 7.3.5, and Liferay DXP 7.3 before fix pack 1 has a vulnerability that allows remote authenticated users to view DDMStructures via GET API calls.

Understanding CVE-2021-29052

This CVE identifies a security flaw in Liferay Portal and Liferay DXP, enabling unauthorized access to DDMStructures through specific API calls.

What is CVE-2021-29052?

The issue in the Data Engine module of the affected Liferay versions permits authenticated remote users to bypass permission checks and retrieve DDMStructures via certain API requests.

The Impact of CVE-2021-29052

The vulnerability can result in unauthorized access to sensitive DDMStructures, potentially leading to data exposure or manipulation by users with authenticated access.

Technical Details of CVE-2021-29052

The technical aspects of this CVE are crucial for understanding the vulnerability, affected systems, and exploit methodologies.

Vulnerability Description

The flaw lies in the failure to validate permissions within the Data Engine module, specifically in the function getSiteDataDefinitionByContentTypeByDataDefinitionKey, enabling users to fetch DDMStructures without proper authorization.

Affected Systems and Versions

Liferay Portal versions 7.3.0 to 7.3.5 and Liferay DXP 7.3 before fix pack 1 are impacted by this vulnerability, exposing DDMStructures to authenticated remote users.

Exploitation Mechanism

By leveraging the mentioned API calls, authenticated users can retrieve DDMStructures without undergoing the necessary permission verification, potentially leading to unauthorized access.

Mitigation and Prevention

Understanding how to mitigate and prevent CVE-2021-29052 is essential for safeguarding systems and data.

Immediate Steps to Take

Users should apply the relevant security patches provided by Liferay to address the vulnerability and prevent unauthorized access to DDMStructures. Additionally, review and restrict API access permissions to mitigate potential risks.

Long-Term Security Practices

Implement a robust access control mechanism within the Data Engine module to ensure that only authorized users can retrieve DDMStructures via API calls. Regular security assessments and audits can also help identify and remediate such vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Liferay for the affected versions. Timely application of patches is crucial to closing security gaps and protecting systems from exploitation.