CVE-2017-17822 in Piwigo
Summary
by MITRE
The List Users API of Piwigo 2.9.2 is vulnerable to SQL Injection via the /admin/user_list_backend.php sSortDir_0 parameter. An attacker can exploit this to gain access to the data in a connected MySQL database.
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Analysis
by VulDB Data Team • 01/18/2023
The vulnerability identified as CVE-2017-17822 affects the List Users API functionality within Piwigo version 2.9.2, specifically targeting the administrative user management interface. This issue resides in the /admin/user_list_backend.php endpoint where the sSortDir_0 parameter is processed without adequate input validation or sanitization. The flaw represents a critical security weakness that allows malicious actors to manipulate database queries through carefully crafted input, potentially leading to unauthorized data access and system compromise.
This SQL injection vulnerability stems from improper handling of user-supplied data within the backend API processing logic. The sSortDir_0 parameter, which is typically used for sorting user lists, becomes a vector for malicious input when not properly escaped or parameterized. Attackers can exploit this weakness by injecting malicious SQL commands that bypass authentication mechanisms and directly access the underlying MySQL database. The vulnerability aligns with CWE-89 which categorizes SQL injection flaws as weaknesses that allow attackers to execute arbitrary SQL commands through untrusted input.
The operational impact of this vulnerability extends beyond simple data theft, as successful exploitation can lead to complete database compromise including user credential exposure, data modification, and potential lateral movement within the affected system. An attacker with access to the administrative interface could escalate privileges, modify user permissions, or even inject malicious code into the application. This vulnerability particularly affects web applications that rely on dynamic SQL queries for user management operations, making it a significant concern for content management systems like Piwigo that handle sensitive user data.
Security practitioners should implement immediate mitigations including input validation and parameterized queries to prevent SQL injection attacks. The recommended approach involves sanitizing all user inputs through proper escaping mechanisms or using prepared statements with parameterized queries. Organizations should also consider implementing web application firewalls and monitoring systems to detect suspicious query patterns. According to ATT&CK framework, this vulnerability maps to T1071.004 for Application Layer Protocol and T1190 for Exploit Public-Facing Application, emphasizing the need for comprehensive defensive measures. The vulnerability underscores the importance of regular security updates and proper input validation practices, as it represents a preventable flaw that could have been addressed through standard secure coding practices and thorough security testing procedures.