CVE-2021-29039 : Exploit Details and Defense Strategies

A Cross-site scripting (XSS) vulnerability in the Asset module's categories administration page in Liferay Portal 7.3.4 allows remote attackers to inject arbitrary web script or HTML via the site name.

Understanding CVE-2021-29039

This CVE pertains to a security flaw in the Asset module of Liferay Portal 7.3.4, enabling attackers to carry out Cross-site scripting (XSS) attacks.

What is CVE-2021-29039?

CVE-2021-29039 is a Cross-site scripting (XSS) vulnerability present in the categories administration page of the Asset module within Liferay Portal 7.3.4. This flaw permits malicious actors to insert and execute arbitrary web scripts or HTML via the site name, potentially compromising the security and integrity of the system.

The Impact of CVE-2021-29039

The exploitation of this vulnerability can lead to unauthorized access, data theft, and the execution of malicious scripts within the affected portal. Attackers could craft convincing phishing attacks or deface the portal by injecting malicious content.

Technical Details of CVE-2021-29039

This section will delve into the specific technical aspects related to CVE-2021-29039.

Vulnerability Description

The vulnerability allows remote attackers to inject malicious web scripts or HTML content via the site name in the Asset module's categories administration page.

Affected Systems and Versions

Liferay Portal 7.3.4 is affected by this vulnerability.

Exploitation Mechanism

By exploiting this vulnerability, attackers can embed harmful scripts into the site name field, enabling the execution of malicious actions when unsuspecting users access the affected page.

Mitigation and Prevention

To safeguard systems from CVE-2021-29039, it is imperative to take immediate steps and adopt long-term security measures.

Immediate Steps to Take

Users should refrain from interacting with untrusted or suspicious links that may lead to the vulnerability's exploitation. It is crucial to sanitize user inputs and implement proper input validation mechanisms within the portal to mitigate XSS attacks.

Long-Term Security Practices

Regular security assessments, code reviews, and security training for developers can bolster the overall security posture of the portal. Constant monitoring and prompt patching of software vulnerabilities are vital.

Patching and Updates

Vendor-supplied patches or updates should be promptly applied to Liferay Portal 7.3.4 to remediate the CVE-2021-29039 vulnerability and enhance system security.