CVE-2021-42077 : Vulnerability Insights and Analysis
Learn about CVE-2021-42077, a SQL injection vulnerability in PHP Event Calendar before 2021-09-03 allowing database compromise and login form bypass. Take immediate steps to secure your systems.
PHP Event Calendar before 2021-09-03 allows SQL injection, potentially compromising the database system and enabling login form bypass.
Understanding CVE-2021-42077
This CVE describes a SQL injection vulnerability in PHP Event Calendar before 2021-09-03 that can lead to significant database compromise.
What is CVE-2021-42077?
PHP Event Calendar before 2021-09-03 is vulnerable to SQL injection via the /server/ajax/user_manager.php username parameter. Exploiting this vulnerability allows an attacker to execute SQL commands directly on the database, potentially leading to a complete compromise of the database system. Additionally, it can be used to bypass the login form.
The Impact of CVE-2021-42077
The exploitation of this vulnerability can have severe consequences:
- Complete compromise of the database system
- Bypassing of the login form, enabling unauthorized access
Technical Details of CVE-2021-42077
This section provides technical insights into the CVE.
Vulnerability Description
The vulnerability in PHP Event Calendar before 2021-09-03 allows for SQL injection through the username parameter in the /server/ajax/user_manager.php file.
Affected Systems and Versions
- Affected: PHP Event Calendar before version 2021-09-03
- Unaffected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited by sending specially crafted SQL queries via the username parameter, allowing attackers to manipulate the database directly.
Mitigation and Prevention
Protecting systems from CVE-2021-42077 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Update PHP Event Calendar to the latest version that includes a patch for the SQL injection vulnerability
- Implement strict input validation and parameterized queries to mitigate SQL injection risks
Long-Term Security Practices
- Regularly monitor and audit web application code for vulnerabilities
- Provide security awareness training to developers on secure coding practices
Patching and Updates
- Stay informed about security updates from PHP Event Calendar and apply patches promptly to address known vulnerabilities.