CVE-2021-33338 : Security Advisory and Response
Learn about CVE-2021-33338 affecting Liferay Portal and DXP versions, exposing CSRF token in URLs, enabling CSRF attacks. Find mitigation steps and best practices here.
The Layout module in Liferay Portal and Liferay DXP versions expose the CSRF token in URLs, potentially enabling attackers to perform CSRF attacks.
Understanding CVE-2021-33338
This CVE highlights a security vulnerability in Liferay Portal and Liferay DXP versions that could be exploited by attackers to conduct Cross-Site Request Forgery (CSRF) attacks.
What is CVE-2021-33338?
The vulnerability in the Layout module of Liferay Portal versions 7.1.0 through 7.3.2, and Liferay DXP 7.1 before fix pack 19, and 7.2 before fix pack 6 exposes the CSRF token in URLs. This exposure allows attackers to intercept the token and perform CSRF attacks using the p_auth parameter.
The Impact of CVE-2021-33338
The impact of this CVE is significant as it opens the door for man-in-the-middle attackers to access the CSRF token and carry out unauthorized actions through CSRF attacks, potentially compromising the security of affected systems.
Technical Details of CVE-2021-33338
This section provides detailed technical insights into the vulnerability.
Vulnerability Description
The vulnerability arises due to the CSRF token being exposed in URLs, enabling attackers to obtain the token for conducting CSRF attacks.
Affected Systems and Versions
Liferay Portal versions 7.1.0 through 7.3.2, Liferay DXP 7.1 (before fix pack 19), and 7.2 (before fix pack 6) are impacted by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by intercepting the CSRF token from the URL and utilizing it to perform CSRF attacks via the p_auth parameter.
Mitigation and Prevention
Protecting systems from CVE-2021-33338 requires immediate action and long-term security measures.
Immediate Steps to Take
Immediately apply security patches provided by Liferay to address the vulnerability. Additionally, consider implementing security protocols to mitigate CSRF risks.
Long-Term Security Practices
Incorporate CSRF protection mechanisms into web applications, conduct regular security audits, and stay updated on security advisories to prevent similar vulnerabilities.
Patching and Updates
Regularly update Liferay Portal and Liferay DXP to the latest secure versions and promptly apply recommended security patches to prevent exploitation of vulnerabilities like CVE-2021-33338.