CVE-2020-28102 in cscms
Summary
by MITRE • 01/11/2022
cscms v4.1 allows for SQL injection via the "js_del" function.
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Analysis
by VulDB Data Team • 01/13/2022
The vulnerability identified as CVE-2020-28102 affects the cscms v4.1 content management system and represents a critical SQL injection flaw within the "js_del" function. This vulnerability falls under the Common Weakness Enumeration category CWE-89 which specifically addresses SQL injection vulnerabilities where untrusted data is directly incorporated into SQL commands without proper sanitization or parameterization. The flaw exists in the application's handling of user-supplied input within the javascript deletion functionality, creating a pathway for malicious actors to execute arbitrary SQL commands against the underlying database.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the js_del function which processes javascript-related deletions. When users interact with the javascript management features, the application fails to properly escape or parameterize user-provided data before incorporating it into database queries. This allows attackers to inject malicious SQL payloads through carefully crafted input that manipulates the query execution flow. The vulnerability is particularly dangerous because it operates at the database interaction layer, potentially enabling full database compromise including data exfiltration, unauthorized access to sensitive information, and privilege escalation.
From an operational impact perspective, this vulnerability creates significant risk for organizations using cscms v4.1 as it provides attackers with direct access to the backend database infrastructure. The attack surface is expanded through the javascript deletion functionality which likely serves legitimate administrative purposes but becomes a vector for unauthorized database manipulation. Successful exploitation could result in complete database compromise, allowing attackers to extract confidential information, modify or delete critical data, and potentially establish persistent access through database-level backdoors. The vulnerability aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1046 for network service discovery, as attackers would need to identify and leverage this specific function to achieve their objectives.
Organizations should implement immediate mitigations including input validation and parameterized queries to prevent SQL injection attacks. The recommended approach involves replacing direct string concatenation with proper parameterized database queries and implementing comprehensive input sanitization routines. Additionally, access controls should be strengthened around the js_del function to limit who can invoke it and what parameters can be passed. Security patches should be applied immediately if available, and network segmentation should be implemented to limit database access to only necessary application components. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in the application's codebase, particularly focusing on all database interaction points. The vulnerability also highlights the importance of following secure coding practices and implementing proper input validation at all levels of application development to prevent similar issues in future releases.