The scanner is designed to identify a vulnerability in MySQL, a widely used open-source relational database management system (RDBMS) developed by Oracle. MySQL is commonly used by developers and companies worldwide for data storage, website operation, and other database needs. The software is favored due to its balance of speed, reliability, and ease of use. Companies of all sizes from startups to major corporations rely on MySQL for their business-critical applications. It is used across various environments, including cloud-based web applications, enterprise-level software, and personal projects. Knowing the security posture of MySQL installations across networks is essential for database admins and enterprise security teams.
This scanner identifies an Authentication Bypass vulnerability in MySQL, which potentially allows unauthorized access to the database. This vulnerability affects MySQL and MariaDB when operating in particular environments where the memcmp function is improperly handled. Attackers could exploit this issue by repeatedly attempting authentication with incorrect passwords until a successful comparison. The vulnerability exists due to improper return value checking, which can undermine security mechanisms and lead to unauthorized access.
The vulnerability occurs at the point where the MySQL database performs authentication checks, with the vulnerability specifically present in the sql/password.c file. Through incorrect handling of the memcmp return value, repeated incorrect password attempts by a remote attacker can eventually result in successful authentication, breaching the intended security barriers. By exploiting this, attackers could potentially escalate their privileges or access sensitive data within the database without correct credentials.
If exploited, this vulnerability can lead to severe database security breaches, including unauthorized access to confidential information and disruption of database services. Attackers can maneuver around authentication processes, gaining access to sensitive data and potentially compromising other connected systems or applications. This can result in data leaks, integrity issues, and compromise the overall security of applications relying on MySQL.
REFERENCES
- Upgrade to MySQL 5.1.63, 5.5.24, 5.6.6 or later versions
- In case of using MariaDB, upgrade to 5.1.62, 5.2.12, 5.3.6, 5.5.23 or later that properly handle memcmp return values
- Regularly audit and monitor databases for unauthorized access attempts or anomalies
- Implement additional authentication layers for critical database operations
- Conduct regular security assessments and patch management practices to maintain updated software
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