CVE-2021-26544 : Exploit Details and Defense Strategies

Apache Livy (Incubating) is vulnerable to a cross-site scripting (XSS) issue in version 0.7.0-incubating. This could allow a malicious user to access other users' sessions and run jobs with their privileges. The vulnerability is fixed in version 0.7.1-incubating.

Understanding CVE-2021-26544

This section provides insights into the nature and impact of the CVE-2021-26544 vulnerability.

What is CVE-2021-26544?

CVE-2021-26544 is a cross-site scripting (XSS) vulnerability in Apache Livy (Incubating) version 0.7.0-incubating. It allows unauthorized users to access logs and results of other sessions and operate within their privileges.

The Impact of CVE-2021-26544

The impact of this vulnerability is significant as it compromises the confidentiality and integrity of user sessions. Malicious actors can exploit this flaw to gain unauthorized access and perform actions on behalf of legitimate users.

Technical Details of CVE-2021-26544

This section delves into the technical aspects of the CVE-2021-26544 vulnerability.

Vulnerability Description

The vulnerability in Livy server version 0.7.0-incubating enables cross-site scripting, facilitating unauthorized access to sensitive user session information.

Affected Systems and Versions

Apache Livy (Incubating) version 0.7.0-incubating is susceptible to this XSS vulnerability.

Exploitation Mechanism

Malicious users can inject scripts into the session name, leading to unauthorized access to logs and results of other users' sessions.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent the exploitation of CVE-2021-26544.

Immediate Steps to Take

Users are advised to upgrade to Livy version 0.7.1-incubating or apply the patch available at the provided GitHub URL.

Long-Term Security Practices

Implement secure coding practices and conduct regular security audits to prevent XSS vulnerabilities.

Patching and Updates

Stay informed about security updates and promptly apply patches released by Apache to address identified vulnerabilities.