CVE-2021-29040 : What You Need to Know

JSON web services in Liferay Portal versions 7.3.4 and earlier, as well as Liferay DXP versions 7.0 (before fix pack 97), 7.1 (before fix pack 20), and 7.2 (before fix pack 10) may expose sensitive information through verbose error messages, potentially enabling remote attackers to carry out more targeted attacks using carefully crafted inputs.

Understanding CVE-2021-29040

This CVE relates to an information disclosure vulnerability in Liferay Portal and Liferay DXP due to the way error messages are handled, which could be exploited by malicious actors to escalate their attacks.

What is CVE-2021-29040?

The security flaw in JSON web services of Liferay Portal and Liferay DXP versions may allow attackers to leverage detailed error messages to refine and improve their malicious activities, making their attacks more effective and potentially causing greater damage.

The Impact of CVE-2021-29040

The impact of this vulnerability lies in the potential misuse of error message details by attackers to enhance the precision and impact of their exploits, posing a significant threat to the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-29040

This section outlines the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability lies in the verbose error messages generated by the JSON web services in Liferay Portal and Liferay DXP, offering substantial insights that could aid attackers in launching more sophisticated and focused attacks.

Affected Systems and Versions

Liferay Portal versions 7.3.4 and earlier, along with Liferay DXP versions 7.0, 7.1, and 7.2 (before specific fix packs) are vulnerable to this issue.

Exploitation Mechanism

Attackers can exploit this vulnerability by analyzing the error messages from JSON web services to gather information for refining their attack strategies and launching more targeted and damaging exploits.

Mitigation and Prevention

Protective measures and actions to mitigate the risk associated with CVE-2021-29040.

Immediate Steps to Take

Organizations should consider filtering error messages to avoid exposing sensitive system details to potential attackers, reducing the risk of information disclosure.

Long-Term Security Practices

Implementing strict error handling mechanisms, regular security assessments, and ensuring timely updates and patches for Liferay Portal and Liferay DXP are essential for enhancing overall security posture.

Patching and Updates

Users are advised to apply the necessary security patches and updates provided by Liferay to address the vulnerability and enhance the resilience of their systems against potential exploitation.