CVE-2021-38266 Explained : Impact and Mitigation
Learn about CVE-2021-38266, a security vulnerability in Liferay Portal and Liferay DXP versions that allows remote attackers to disrupt user authentication. Find out the impact, technical details, and mitigation steps.
A vulnerability in the Portal Security module of Liferay Portal and Liferay DXP versions allows remote attackers to disrupt user authentication.
Understanding CVE-2021-38266
This CVE refers to a flaw in Liferay Portal and Liferay DXP that impacts user authentication through LDAP.
What is CVE-2021-38266?
The Portal Security module in Liferay Portal versions 7.2.1 and earlier, and Liferay DXP versions 7.0, 7.1, and 7.2 does not correctly import users from LDAP. This issue enables attackers to block legitimate users from authenticating by signing in as an LDAP user.
The Impact of CVE-2021-38266
The vulnerability allows malicious actors to disrupt the authentication process for valid users, potentially leading to service disruptions and unauthorized access.
Technical Details of CVE-2021-38266
The following technical details outline the specifics of the CVE.
Vulnerability Description
The flaw in Liferay Portal and Liferay DXP versions prevents the correct import of users from LDAP, enabling attackers to interfere with user authentication.
Affected Systems and Versions
Liferay Portal 7.2.1 and earlier, Liferay DXP 7.0, 7.1, and 7.2 are affected by this vulnerability.
Exploitation Mechanism
Remote attackers exploit this flaw by attempting to sign in as an LDAP user, disrupting the authentication process for legitimate users.
Mitigation and Prevention
To secure systems and protect against CVE-2021-38266, consider the following mitigation strategies.
Immediate Steps to Take
Organizations should apply the necessary security patches provided by Liferay to address this vulnerability. Additionally, monitoring authentication logs for suspicious activities can help detect potential attacks.
Long-Term Security Practices
Implementing strict access controls, regularly updating software, and conducting security training for employees can enhance overall security posture and minimize the risk of similar vulnerabilities.
Patching and Updates
Stay informed about security updates released by Liferay for Liferay Portal and Liferay DXP. Promptly applying patches and updates can help mitigate the risk of exploitation.