CVE-2020-36136 in CSZCMS
Summary
by MITRE • 08/11/2023
SQL Injection vulnerability in cskaza cszcms version 1.2.9, allows attackers to gain sensitive information via pm_sendmail parameter in csz_model.php.
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Analysis
by VulDB Data Team • 09/08/2023
The CVE-2020-36136 vulnerability represents a critical SQL injection flaw within the cskaza cszcms version 1.2.9 content management system. This vulnerability specifically targets the pm_sendmail parameter within the csz_model.php file, creating a pathway for malicious actors to execute unauthorized database queries. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly escape or filter user-supplied data before incorporating it into SQL command structures. This type of vulnerability falls under the CWE-89 category, which specifically addresses SQL injection attacks where untrusted data is directly embedded into database queries without proper sanitization.
The technical exploitation of this vulnerability occurs when an attacker manipulates the pm_sendmail parameter to inject malicious SQL payloads into the application's database interaction logic. The csz_model.php file serves as the primary entry point for this attack vector, where the application processes user inputs without adequate protection against SQL command injection. When the application fails to implement proper parameterized queries or input validation, attackers can manipulate the database by injecting SQL syntax that alters the intended query execution flow. This allows unauthorized access to database contents, potentially exposing sensitive information including user credentials, personal data, and system configurations.
The operational impact of this vulnerability extends beyond simple data exposure, as it can enable attackers to perform comprehensive database enumeration, data modification, and privilege escalation attacks. Successful exploitation may result in complete database compromise, allowing attackers to extract all stored information, modify existing records, or even delete critical database components. The vulnerability's presence in a content management system creates additional risks as attackers can leverage the compromised system to host malicious content, conduct further reconnaissance, or establish persistent access points within the target network. This aligns with ATT&CK technique T1071.004 for application layer protocol usage and T1046 for network service scanning.
Mitigation strategies for CVE-2020-36136 should prioritize immediate patching of the cskaza cszcms to version 1.2.10 or later, which contains the necessary fixes for the SQL injection vulnerability. Organizations should implement proper input validation and sanitization measures, ensuring all user-supplied data undergoes rigorous filtering before database interaction. The implementation of parameterized queries or prepared statements should be mandatory across all database access points to prevent injection attacks. Additionally, network segmentation and access controls should be enforced to limit database exposure, while regular security audits and penetration testing should be conducted to identify similar vulnerabilities. Security monitoring systems should be configured to detect anomalous database query patterns that may indicate exploitation attempts, and comprehensive logging should be maintained for forensic analysis purposes. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing defense-in-depth strategies to protect against common injection attack vectors.