CVE-2021-46659 : Exploit Details and Defense Strategies
Learn about CVE-2021-46659, a vulnerability in MariaDB before 10.7.2 causing application crashes. Find out the impact, affected versions, and mitigation steps here.
MariaDB before 10.7.2 allows an application crash due to the misunderstanding of SELECT_LEX::nest_level within each VIEW.
Understanding CVE-2021-46659
What is CVE-2021-46659?
MariaDB before version 10.7.2 is vulnerable to an issue that can cause an application crash.
The Impact of CVE-2021-46659
The vulnerability could lead to a denial of service (DoS) scenario where an application utilizing MariaDB could crash due to misinterpretation of a specific variable within VIEW.
Technical Details of CVE-2021-46659
Vulnerability Description
The problem arises from the failure to correctly handle SELECT_LEX::nest_level in individual VIEW instances.
Affected Systems and Versions
- Product: MariaDB
- Vendor: MariaDB
- Versions affected: All versions before 10.7.2
Exploitation Mechanism
The exploitation would involve crafting a malicious query that leverages the mishandling of the SELECT_LEX::nest_level variable.
Mitigation and Prevention
Immediate Steps to Take
- Update MariaDB to version 10.7.2 or later to eliminate the vulnerability.
- Monitor vendor security advisories for any patches or workarounds.
Long-Term Security Practices
- Regularly update software and applications to prevent known vulnerabilities.
- Perform security audits to identify and address potential issues.
Patching and Updates
Apply patches provided by MariaDB promptly to ensure that the vulnerability is mitigated effectively.