CVE-2020-35337 in ThinkSAAS
Summary
by MITRE • 03/24/2021
ThinkSAAS before 3.38 contains a SQL injection vulnerability through app/topic/action/admin/topic.php via the title parameter, which allows remote attackers to execute arbitrary SQL commands.
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Analysis
by VulDB Data Team • 04/04/2021
The vulnerability identified as CVE-2020-35337 represents a critical SQL injection flaw within the ThinkSAAS content management system prior to version 3.38. This vulnerability specifically manifests in the administrative topic management functionality through the app/topic/action/admin/topic.php script where user input is improperly handled. The affected parameter is the title field which serves as the primary attack vector for malicious actors seeking to exploit this weakness. The vulnerability classification aligns with CWE-89 which defines SQL injection as the insertion of malicious SQL code into input fields that are then processed by database queries without proper sanitization or parameterization.
The technical exploitation of this vulnerability occurs when an attacker submits malicious input through the title parameter in the administrative topic management interface. This input bypasses normal input validation mechanisms and directly influences the SQL query execution context. The flaw stems from improper input sanitization where user-supplied data is concatenated directly into SQL statements rather than being properly parameterized or escaped. This allows attackers to manipulate the underlying database queries and execute arbitrary SQL commands with the privileges of the database user account. The remote nature of the attack means that exploitation can occur without requiring physical access to the system or authentication to the administrative interface, making it particularly dangerous for publicly accessible web applications.
The operational impact of this vulnerability extends beyond simple data theft or modification. Attackers can leverage this weakness to gain unauthorized access to sensitive database information including user credentials, personal data, and system configuration details. The ability to execute arbitrary SQL commands provides attackers with extensive control over the database layer, potentially enabling them to escalate privileges, create backdoors, or even compromise the entire underlying system. Given that this affects the administrative topic management functionality, attackers could manipulate content, delete critical data, or modify the behavior of the application. The vulnerability also poses significant risk to data integrity and confidentiality, as database access often provides attackers with the capability to read, modify, or delete any information stored within the system.
Mitigation strategies for CVE-2020-35337 primarily focus on implementing proper input validation and parameterization techniques to prevent SQL injection attacks. Organizations should immediately upgrade to ThinkSAAS version 3.38 or later where this vulnerability has been addressed through proper input sanitization and parameterized query implementation. The fix typically involves using prepared statements or parameterized queries to ensure that user input cannot alter the structure of SQL commands. Additionally, implementing proper input validation at multiple layers including application firewall rules, web application security controls, and database access controls can provide defense-in-depth protection. Security monitoring should include detection of unusual database query patterns and SQL injection attempts. The vulnerability also highlights the importance of regular security assessments and vulnerability scanning to identify similar weaknesses in other components of the application stack. From an ATT&CK framework perspective, this vulnerability maps to techniques involving SQL injection and privilege escalation, demonstrating how initial access through web application vulnerabilities can lead to broader system compromise.