CVE-2021-43701 in CSZ CMS
Summary
by MITRE • 03/29/2022
CSZ CMS 1.2.9 has a Time and Boolean-based Blind SQL Injection vulnerability in the endpoint /admin/export/getcsv/article_db, via the fieldS[] and orderby parameters.
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Analysis
by VulDB Data Team • 12/15/2024
The vulnerability CVE-2021-43701 represents a critical security flaw in CSZ CMS version 1.2.9 that exposes the application to time-based and boolean-based blind SQL injection attacks. This vulnerability specifically targets the administrative export functionality at the endpoint /admin/export/getcsv/article_db, making it particularly dangerous as it affects the backend data export capabilities that administrators rely upon for content management and reporting purposes. The flaw arises from insufficient input validation and sanitization of user-supplied parameters, creating an attack surface that malicious actors can exploit to gain unauthorized access to the underlying database infrastructure.
The technical implementation of this vulnerability stems from the improper handling of the fieldS[] and orderby parameters within the targeted endpoint. When these parameters are processed, the application fails to adequately sanitize or escape user input before incorporating it into SQL query construction. Attackers can leverage this weakness by crafting malicious payloads that manipulate the SQL execution flow through timing delays or boolean conditions. In time-based attacks, the server response times are manipulated to infer information about the database structure and contents, while boolean-based techniques rely on conditional responses to determine the truth value of specific database queries. This type of vulnerability falls under CWE-89 which specifically addresses SQL injection flaws, and more precisely aligns with CWE-459 which covers incomplete input validation.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with potential access to sensitive administrative information, user credentials, and content management data. An attacker who successfully exploits this vulnerability could extract database schema information, access confidential user data, modify content, or potentially escalate privileges within the CMS environment. The attack vector is particularly concerning because it targets administrative functionality, meaning that successful exploitation could lead to full system compromise. The vulnerability's presence in the export functionality suggests that even routine administrative tasks could be weaponized, making this issue particularly dangerous for organizations relying on CSZ CMS for content management operations.
Organizations affected by this vulnerability should immediately implement mitigations including input validation and parameterized query usage to prevent SQL injection attacks. The recommended approach involves implementing proper input sanitization routines that filter or escape special characters in user-supplied parameters, particularly those that could be used to manipulate SQL queries. Additionally, implementing web application firewalls with SQL injection detection capabilities can provide an additional layer of protection. The solution should also include disabling or restricting access to administrative endpoints when not actively needed, and implementing proper access controls to ensure that only authorized personnel can access the vulnerable export functionality. This vulnerability demonstrates the critical importance of input validation and secure coding practices in preventing database-level attacks, aligning with ATT&CK technique T1190 which covers SQL injection attacks and T1071.004 which covers application layer protocols including HTTP-based attacks that could leverage such vulnerabilities for data exfiltration and system compromise.