CVE-2020-10106 in Daily Expense Tracker System
Summary
by MITRE
PHPGurukul Daily Expense Tracker System 1.0 is vulnerable to SQL injection, as demonstrated by the email parameter in index.php or register.php. The SQL injection allows to dump the MySQL database and to bypass the login prompt.
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Analysis
by VulDB Data Team • 04/09/2024
The vulnerability identified as CVE-2020-10106 affects the PHPGurukul Daily Expense Tracker System version 1.0, representing a critical security flaw that exposes the application to unauthorized database access and authentication bypass. This vulnerability resides within the application's input validation mechanisms, specifically targeting the email parameter handling in two key files: index.php and register.php. The flaw stems from insufficient sanitization of user-supplied input, allowing malicious actors to inject arbitrary SQL commands that are then executed by the underlying MySQL database server. The vulnerability classification aligns with CWE-89 which defines SQL injection as the improper handling of SQL command structure in applications, making it one of the most prevalent and dangerous web application security weaknesses.
The technical exploitation of this vulnerability occurs when an attacker submits maliciously crafted input through the email parameter field in either the login or registration pages. The application fails to properly escape or parameterize the input before incorporating it into SQL queries, enabling attackers to manipulate the intended database operations. When the application processes these malformed inputs, the SQL injection payload can execute commands that extract sensitive database information including user credentials, personal data, and application configuration details. The attack vector demonstrates a classic blind SQL injection scenario where the attacker can infer database structure through response differences and ultimately gain complete database access through the injected commands.
The operational impact of this vulnerability extends beyond simple data theft, as it enables full authentication bypass capabilities that can compromise the entire application ecosystem. An attacker exploiting this vulnerability can not only dump the MySQL database contents but also manipulate user accounts, modify application data, and potentially escalate privileges within the system. The vulnerability affects the core authentication mechanisms of the expense tracking system, rendering the login protection ineffective against skilled adversaries. This weakness creates a persistent threat that can be exploited repeatedly without detection, potentially leading to long-term unauthorized access and data compromise across the entire user base of the application.
Mitigation strategies for CVE-2020-10106 should prioritize immediate implementation of proper input validation and parameterized queries to prevent SQL injection attacks. Organizations should implement prepared statements with parameterized queries for all database interactions, ensuring that user input is never directly concatenated into SQL commands. The application code must be reviewed and updated to sanitize all user inputs, particularly those used in authentication and registration workflows. Security patches should be applied immediately to the affected PHPGurukul system, and comprehensive input validation should be implemented across all application parameters. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts, while regular security audits should be conducted to identify and remediate similar vulnerabilities in other application components. The vulnerability demonstrates the critical importance of following secure coding practices as outlined in the OWASP Top Ten and MITRE ATT&CK framework, particularly the techniques related to SQL injection and credential access.