CVE-2019-19734 in YetiShare
Summary
by MITRE
_account_move_file_in_folder.ajax.php in MFScripts YetiShare 3.5.2 directly inserts values from the fileIds parameter into a SQL string. This allows an attacker to inject their own SQL and manipulate the query, typically extracting data from the database, aka SQL Injection.
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Analysis
by VulDB Data Team • 03/18/2024
The vulnerability identified as CVE-2019-19734 affects MFScripts YetiShare version 3.5.2 and represents a critical SQL injection flaw within the _account_move_file_in_folder.ajax.php component. This vulnerability stems from improper input validation and sanitization mechanisms that fail to adequately filter user-supplied data before incorporating it into database queries. The specific flaw occurs when the fileIds parameter is directly concatenated into SQL strings without appropriate escaping or parameterization techniques, creating an avenue for malicious actors to manipulate database operations through crafted input sequences.
The technical implementation of this vulnerability places the system at significant risk as attackers can exploit the lack of input sanitization to execute arbitrary SQL commands against the underlying database. When the fileIds parameter is processed, the application fails to implement proper prepared statements or SQL escaping mechanisms, allowing an attacker to inject malicious SQL fragments that get executed within the database context. This injection capability enables attackers to perform unauthorized data extraction, modification, or deletion operations, potentially compromising the entire database infrastructure and the sensitive information stored within it.
From an operational impact perspective, this vulnerability poses severe risks to organizations using YetiShare 3.5.2 as it provides attackers with direct access to database content through simple parameter manipulation. The attack surface is particularly concerning as it requires minimal privileges to exploit, potentially allowing unauthorized users to extract confidential information including user credentials, personal data, and system configurations. The vulnerability aligns with CWE-89 which classifies improper neutralization of special elements used in SQL commands as a primary weakness leading to SQL injection attacks.
Security professionals should consider this vulnerability in relation to ATT&CK framework tactics including T1071.004 for application layer protocol and T1046 for network service scanning, as attackers may use this vulnerability to enumerate database structures and extract sensitive information. The exploitation process typically involves crafting malicious fileIds parameters that contain SQL injection payloads, which when processed by the vulnerable application, result in unauthorized database access. Organizations implementing this software should prioritize immediate remediation through input validation and parameterized queries, while also conducting comprehensive security assessments to identify potential secondary impacts.
Mitigation strategies should focus on implementing proper input validation mechanisms that sanitize all user-supplied data before database processing, utilizing prepared statements or parameterized queries to prevent SQL injection exploitation. The recommended approach includes updating to patched versions of YetiShare, implementing web application firewalls to detect and block malicious SQL injection attempts, and conducting regular security audits to identify similar vulnerabilities in other application components. Additionally, organizations should establish proper database access controls and monitoring systems to detect unauthorized database activities that may indicate exploitation attempts.