CVE-2018-17562 in FaxFinder
Summary
by MITRE
Multi-Tech FaxFinder before 5.1.6 has SQL Injection via a status/call_details?oid= URI, allowing an attacker to extract the underlying database schema to further disclose other fax server information through different injection points.
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Analysis
by VulDB Data Team • 03/29/2020
The vulnerability identified as CVE-2018-17562 affects Multi-Tech FaxFinder versions prior to 5.1.6 and represents a critical SQL injection flaw that exposes sensitive database information. This vulnerability resides within the status/call_details endpoint where the oid parameter is processed without proper input validation or sanitization. The flaw allows remote attackers to manipulate the SQL query execution by injecting malicious SQL commands through the URI parameter, thereby compromising the integrity and confidentiality of the fax server's underlying database structure.
The technical implementation of this vulnerability follows the classic SQL injection pattern where user-supplied input is directly concatenated into SQL commands without appropriate escaping or parameterization. The oid parameter in the status/call_details?oid= URI serves as the primary attack vector, enabling attackers to construct malicious SQL payloads that can extract database schema information. This type of vulnerability falls under CWE-89 which specifically addresses SQL injection flaws in software applications. The attack surface is particularly concerning as it provides not only database schema disclosure but also enables further exploitation through multiple injection points that can reveal additional fax server information.
The operational impact of this vulnerability extends beyond simple data disclosure, as it creates a foundation for more sophisticated attacks against the fax server infrastructure. An attacker who successfully exploits this vulnerability can extract database schema information, user credentials, fax logs, and potentially gain unauthorized access to other system components. The exposure of database schema information provides attackers with crucial mapping of the database structure, including table names, column names, and data relationships, which significantly reduces the effort required for subsequent attacks. This vulnerability directly aligns with ATT&CK technique T1071.004 which covers application layer protocol manipulation and T1046 which addresses network service scanning, as the attacker can systematically probe the database structure to identify exploitable components.
Mitigation strategies for this vulnerability require immediate implementation of proper input validation and parameterized queries throughout the application codebase. Organizations should implement web application firewalls to filter suspicious SQL injection patterns and ensure that all user inputs are properly sanitized before being processed in database queries. The most effective remediation involves upgrading to Multi-Tech FaxFinder version 5.1.6 or later, which contains the necessary patches to address the SQL injection vulnerability. Additionally, implementing principle of least privilege access controls, regular database schema audits, and comprehensive monitoring of database access patterns can help detect and prevent exploitation attempts. Security teams should also conduct thorough penetration testing to identify any additional injection points that may exist within the fax server infrastructure and ensure that all database interactions follow secure coding practices as recommended by OWASP and NIST guidelines.