CVE-2021-34538 : Security Advisory and Response
Discover how Apache Hive's security vulnerability in UDFs before version 3.1.3 could allow unauthorized users to manipulate UDFs with potentially malicious jars. Learn about the impact, technical details, and mitigation steps.
Apache Hive before version 3.1.3 is impacted by a security vulnerability related to UDFs that could allow unauthorized users to manipulate UDFs with potentially malicious jars. This CVE was discovered and reported by Hideyuki Furue.
Understanding CVE-2021-34538
This section will cover the details of the CVE-2021-34538 vulnerability in Apache Hive.
What is CVE-2021-34538?
Apache Hive prior to version 3.1.3 had a vulnerability in the "CREATE" and "DROP" function operations that did not check for necessary authorization. This flaw allowed unauthorized users to modify UDFs, potentially leading to the pointing of UDFs to malicious jars.
The Impact of CVE-2021-34538
The impact of this CVE is considered very important due to the potential risk of unauthorized users dropping and recreating UDFs with harmful jars.
Technical Details of CVE-2021-34538
This section will delve into the technical aspects of CVE-2021-34538.
Vulnerability Description
The vulnerability arises from the lack of authorization checks in the "CREATE" and "DROP" function operations in Apache Hive before version 3.1.3.
Affected Systems and Versions
The affected product is Apache Hive, specifically versions before 3.1.3.
Exploitation Mechanism
Unauthorized or underprivileged users can exploit this vulnerability by manipulating existing UDFs without the necessary privileges.
Mitigation and Prevention
In this section, we will discuss the steps to mitigate and prevent the exploitation of CVE-2021-34538.
Immediate Steps to Take
It is crucial to update Apache Hive to version 3.1.3 or later to address this vulnerability. Additionally, enforce strict access controls to prevent unauthorized access.
Long-Term Security Practices
Regularly update and patch Apache Hive to stay protected against known vulnerabilities. Train users on secure coding practices to minimize the risk of unauthorized UDF manipulation.
Patching and Updates
Stay informed about security updates released by the Apache Software Foundation for Apache Hive to apply patches promptly and ensure the security of your systems.