CVE-2019-12350 in ZZCMS
Summary
by MITRE • 06/02/2022
An issue was discovered in zzcms 2019. SQL Injection exists in dl/dl_download.php via an id parameter value with a trailing comma.
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Analysis
by VulDB Data Team • 06/04/2022
The vulnerability CVE-2019-12350 represents a critical sql injection flaw within the zzcms 2019 content management system that specifically affects the dl/dl_download.php component. This vulnerability arises from insufficient input validation and sanitization of user-supplied data, creating an exploitable condition that allows attackers to manipulate database queries through the id parameter. The precise nature of the vulnerability involves a trailing comma in the parameter value which bypasses certain sanitization mechanisms and enables malicious sql commands to be executed within the database context. This issue falls under the common weakness enumeration CWE-89 which categorizes sql injection vulnerabilities as a fundamental weakness in software applications that fail to properly validate or escape user input before incorporating it into sql queries.
The operational impact of this vulnerability extends beyond simple data theft or modification, as it provides attackers with potential access to sensitive information stored within the application's database. Attackers can leverage this sql injection to extract confidential data including user credentials, personal information, and potentially administrative access credentials that could lead to full system compromise. The vulnerability is particularly concerning because it requires minimal exploitation effort and can be automated, making it attractive to both script kiddies and sophisticated attackers. The trailing comma technique suggests a specific bypass method that may indicate the application employs basic input filtering that can be circumvented through careful parameter manipulation, aligning with attack patterns documented in the mitre attack framework under the technique of command and control communication through sql injection.
Security professionals should consider this vulnerability in the context of broader application security practices and implement comprehensive mitigations including input validation, parameterized queries, and proper error handling. The recommended remediation involves implementing strict input validation for the id parameter in dl_download.php, ensuring all user-supplied data is properly escaped or parameterized before database interaction. Additionally, implementing web application firewalls and database activity monitoring can provide additional layers of protection against exploitation attempts. Organizations should also conduct thorough security assessments of their zzcms installations to identify similar vulnerabilities and ensure that all database interactions follow secure coding practices that prevent sql injection attacks. The vulnerability demonstrates the importance of defense in depth strategies and proper input sanitization as fundamental security controls that should be implemented across all application components to prevent unauthorized database access and data compromise.