CVE-2021-29045 : What You Need to Know
Learn about CVE-2021-29045, a Cross-site scripting vulnerability in Liferay Portal 7.3.2 through 7.3.5 and Liferay DXP 7.3, allowing remote attackers to inject arbitrary web scripts or HTML.
A Cross-site scripting (XSS) vulnerability in the Redirect module's redirection administration page in Liferay Portal 7.3.2 through 7.3.5, and Liferay DXP 7.3 before fix pack 1 has been identified. Attackers can inject arbitrary web script or HTML through a specific parameter.
Understanding CVE-2021-29045
This section will cover essential information about the CVE-2021-29045 vulnerability.
What is CVE-2021-29045?
CVE-2021-29045 is a Cross-site scripting (XSS) vulnerability found in Liferay Portal and Liferay DXP, allowing remote attackers to inject malicious scripts or HTML content.
The Impact of CVE-2021-29045
The vulnerability can be exploited by attackers to execute malicious scripts in the context of an authenticated user's session, potentially leading to sensitive data theft or unauthorized actions.
Technical Details of CVE-2021-29045
In this section, we will delve into the technical aspects of the CVE-2021-29045 vulnerability.
Vulnerability Description
The XSS vulnerability exists in the redirection administration page of Liferay Portal versions 7.3.2 through 7.3.5, and Liferay DXP 7.3 before fix pack 1 due to improper input validation of a particular parameter.
Affected Systems and Versions
The affected systems include Liferay Portal versions 7.3.2 through 7.3.5 and Liferay DXP 7.3 before fix pack 1.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by injecting malicious web scripts or HTML code via the _com_liferay_redirect_web_internal_portlet_RedirectPortlet_destinationURL parameter.
Mitigation and Prevention
This section will provide insights on how to mitigate and prevent the exploitation of CVE-2021-29045.
Immediate Steps to Take
Users are advised to update their Liferay Portal and Liferay DXP to the latest patched versions to eliminate this vulnerability. Additionally, input validation mechanisms should be implemented to sanitize user inputs.
Long-Term Security Practices
Maintaining good security hygiene by regularly updating software, implementing security best practices, and educating users on safe computing practices can help prevent such vulnerabilities.
Patching and Updates
Vendors have released patches to address this vulnerability. Users are recommended to apply the latest security updates provided by Liferay for their respective products.