CVE-2020-35430 in Inxedu
Summary
by MITRE • 04/29/2021
SQL Injection in com/inxedu/OS/edu/controller/letter/AdminMsgSystemController in Inxedu v2.0.6 via the ids parameter to admin/letter/delsystem.
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Analysis
by VulDB Data Team • 05/03/2021
The vulnerability CVE-2020-35430 represents a critical SQL injection flaw within the Inxedu learning management system version 2.0.6. This vulnerability specifically affects the AdminMsgSystemController component which handles system message management operations. The flaw manifests when the application processes the ids parameter through the admin/letter/delsystem endpoint, where user-supplied input directly influences database query construction without proper sanitization or parameterization.
This SQL injection vulnerability stems from insufficient input validation and improper query building practices within the application's backend logic. The ids parameter serves as the attack vector where malicious actors can inject arbitrary SQL commands that get executed against the underlying database. The vulnerability is classified as CWE-89 according to the Common Weakness Enumeration catalog, which specifically addresses SQL injection flaws where untrusted data is incorporated into SQL queries without adequate protection mechanisms. The flaw represents a classic case of inadequate input filtering that allows attackers to manipulate database operations through crafted malicious input.
The operational impact of this vulnerability is severe and multifaceted. An attacker who successfully exploits this SQL injection flaw can potentially extract sensitive data from the database including user credentials, personal information, and system configuration details. The vulnerability also enables data modification and deletion operations, allowing malicious actors to alter or destroy critical educational content and user records. Furthermore, the attacker could escalate privileges within the system, potentially gaining administrative control over the entire learning management platform. This type of vulnerability directly aligns with ATT&CK technique T1071.005 for application layer protocol manipulation and T1213.002 for data from information repositories, representing significant threats to data integrity and confidentiality.
Mitigation strategies for this vulnerability require immediate implementation of multiple security controls. The primary defense involves implementing proper parameterized queries or prepared statements to ensure that user input cannot influence SQL query structure. Input validation and sanitization should be enforced at multiple layers including application-level filters and database-level protections. The application should also implement proper access controls and least privilege principles to limit the damage potential even if exploitation occurs. Additionally, regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities throughout the codebase. Network segmentation and monitoring solutions should be deployed to detect and prevent unauthorized access attempts targeting this specific vulnerability. Organizations using Inxedu v2.0.6 should urgently apply vendor patches or implement compensating controls until a permanent fix is available, as this vulnerability represents a significant risk to educational data security and privacy compliance requirements.