CVE-2019-12355 in zzcms
Summary
by MITRE • 06/17/2022
An issue was discovered in zzcms 2019. There is a SQL injection Vulnerability in /user/dls_print.php (when the attacker has dls_print authority) via the id parameter.
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Analysis
by VulDB Data Team • 06/17/2022
The vulnerability identified as CVE-2019-12355 represents a critical SQL injection flaw within the zzcms 2019 content management system that exposes sensitive data and potentially enables full system compromise. This vulnerability specifically affects the /user/dls_print.php script which is accessible to users with dls_print authority, creating a pathway for authenticated attackers to manipulate database queries through improper input validation. The flaw occurs when the id parameter is processed without adequate sanitization or parameterization, allowing malicious SQL commands to be executed within the database context.
The technical implementation of this vulnerability stems from the application's failure to properly escape or parameterize user-supplied input in the id parameter of the dls_print.php endpoint. When an authenticated user with dls_print privileges submits a malicious id value, the application directly incorporates this input into SQL query construction without appropriate validation mechanisms. This primitive input handling pattern aligns with CWE-89, which categorizes SQL injection vulnerabilities as a result of insufficient input sanitization and improper query construction. The vulnerability operates at the application layer where user input transitions directly into database operations, creating a direct attack vector that bypasses normal authentication and authorization controls.
The operational impact of this vulnerability extends beyond simple data extraction to potentially enable complete database compromise and system infiltration. An attacker with dls_print authority can leverage this flaw to enumerate database schemas, extract user credentials, access confidential information, and potentially escalate privileges within the application. The vulnerability's exploitation requires only minimal authentication privileges, making it particularly dangerous as it can be exploited by users with limited access rights. This scenario creates a privilege escalation pathway that violates the principle of least privilege and could lead to unauthorized data manipulation, disclosure, or deletion. The attack surface is further expanded due to the potential for chained attacks where initial SQL injection leads to additional vulnerabilities such as command execution or file inclusion.
Mitigation strategies for CVE-2019-12355 must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. The primary solution involves implementing proper parameterized queries or prepared statements in the dls_print.php script to ensure that user input cannot influence SQL command structure. Additionally, input validation should be enforced at multiple layers including application-level sanitization, output encoding, and proper access controls to limit the scope of privilege abuse. Security controls should include mandatory parameter validation, logging of suspicious input patterns, and regular security testing of database interfaces. Organizations should also implement the principle of least privilege by reviewing and restricting dls_print authority assignments to only those users who require such access for legitimate business functions. The vulnerability demonstrates the importance of adhering to secure coding practices and following ATT&CK framework guidance for preventing injection attacks, particularly in web applications where user input processing creates inherent security risks. Regular vulnerability assessments and security code reviews are essential to identify and remediate similar injection vulnerabilities across the entire application stack.