CVE-2018-7802 in Parking
Summary
by MITRE
A SQL Injection vulnerability exists in EVLink Parking, v3.2.0-12_v1 and earlier, which could give access to the web interface with full privileges.
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Analysis
by VulDB Data Team • 04/24/2020
The CVE-2018-7802 vulnerability represents a critical SQL injection flaw in EVLink Parking software version 3.2.0-12_v1 and earlier, presenting a significant security risk to organizations utilizing this parking management system. This vulnerability resides within the web interface component of the software, specifically targeting input validation mechanisms that fail to properly sanitize user-supplied data before processing. The flaw allows authenticated attackers with minimal privileges to escalate their access level and gain full administrative control over the system, effectively compromising the entire parking management infrastructure.
The technical implementation of this vulnerability stems from inadequate parameter validation within the application's database interaction layers. When user input is directly incorporated into SQL query constructions without proper sanitization or parameterization, attackers can manipulate the query structure to extract sensitive information, modify database contents, or execute arbitrary commands. This type of vulnerability falls under CWE-89 which specifically addresses SQL injection flaws where untrusted data is used to construct SQL queries without proper validation or escaping mechanisms. The attack vector typically involves crafting malicious input strings that exploit the lack of input sanitization in form fields, URL parameters, or API endpoints that interact with the backend database.
The operational impact of CVE-2018-7802 extends beyond simple data compromise, as it enables full administrative access to the EVLink Parking system, potentially allowing attackers to manipulate parking records, modify user permissions, access financial transaction data, and even disrupt parking operations. Organizations relying on this software for managing vehicle access control, payment processing, and facility management could face severe consequences including unauthorized access to restricted areas, financial fraud through transaction manipulation, and complete system compromise that may affect multiple facilities if the vulnerability exists across deployed instances. The vulnerability's exploitation capability aligns with ATT&CK technique T1071.004 for application layer protocol manipulation and T1484.001 for privilege escalation, making it particularly dangerous in enterprise environments where such systems integrate with broader security infrastructures.
Mitigation strategies for CVE-2018-7802 require immediate implementation of security patches provided by EVLink or the software vendor, as well as comprehensive input validation measures that enforce proper parameterization of all database queries. Organizations should implement web application firewalls to monitor and filter suspicious database query patterns, conduct thorough penetration testing to identify potential exploitation vectors, and establish robust access control policies that limit administrative privileges to only essential personnel. Additionally, regular security audits of database interactions, implementation of principle of least privilege for database accounts, and deployment of automated vulnerability scanning tools can help prevent similar vulnerabilities from being introduced in future software versions. The remediation process should also include comprehensive staff training on secure coding practices and proper input validation techniques to prevent recurrence of such flaws in custom applications or modified versions of the software.