CVE-2021-46662 : Vulnerability Insights and Analysis

MariaDB through 10.5.9 allows a set_var.cc application crash via certain uses of an UPDATE statement in conjunction with a nested subquery.

Understanding CVE-2021-46662

What is CVE-2021-46662?

CVE-2021-46662 is a vulnerability in MariaDB through version 10.5.9 that can lead to an application crash when utilizing specific UPDATE statement scenarios with nested subqueries.

The Impact of CVE-2021-46662

This vulnerability can potentially cause a denial-of-service (DoS) situation due to an application crash, potentially leading to service disruption and data loss.

Technical Details of CVE-2021-46662

Vulnerability Description

The vulnerability in MariaDB allows a set_var.cc application crash under specific circumstances involving the use of an UPDATE statement combined with a nested subquery.

Affected Systems and Versions

Affected Product: MariaDB
Affected Version: up to and including 10.5.9

Exploitation Mechanism

The vulnerability can be exploited by malicious actors who execute a crafted UPDATE statement within a nested subquery, triggering the application crash.

Mitigation and Prevention

Immediate Steps to Take

Upgrade MariaDB to a patched version beyond 10.5.9 to mitigate the vulnerability.
Monitor vendor security channels for updates and patches addressing this issue.

Long-Term Security Practices

Regularly update and patch database management systems to prevent known vulnerabilities.
Implement secure coding practices to mitigate the risk of similar vulnerabilities in the future.

Patching and Updates

Apply the latest patches and updates provided by MariaDB to address CVE-2021-46662 and other potential security issues.