CVE-2017-17103 in Fiyo
Summary
by MITRE
Fiyo CMS 2.0.7 has SQL injection in /apps/app_user/sys_user.php via $_POST[name] or $_POST[email]. This vulnerability can lead to escalation from normal user privileges to administrator privileges.
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Analysis
by VulDB Data Team • 01/16/2023
This vulnerability exists within Fiyo CMS version 2.0.7 where improper input validation allows malicious users to inject SQL commands through the $_POST[name] or $_POST[email] parameters in the /apps/app_user/sys_user.php file. The flaw represents a classic SQL injection vulnerability that enables attackers to manipulate database queries and potentially escalate their privileges from standard user accounts to administrative levels. The vulnerability falls under CWE-89 which specifically addresses SQL injection flaws where untrusted data is incorporated into SQL commands without proper sanitization or parameterization. Attackers can exploit this weakness by crafting malicious input in the name or email fields during user registration or profile update operations, thereby executing arbitrary SQL commands against the underlying database system.
The operational impact of this vulnerability extends beyond simple data theft or modification, as it provides a pathway for privilege escalation attacks that can fundamentally compromise the entire content management system. When an attacker successfully injects SQL commands, they can extract sensitive information including user credentials, administrative passwords, and other confidential data stored within the database. The vulnerability enables attackers to manipulate user permissions and potentially gain full administrative control over the CMS, which aligns with ATT&CK technique T1078 for valid accounts and T1499 for endpoint detection and response evasion. This type of attack can result in complete system compromise and unauthorized access to all content managed by the CMS.
Mitigation strategies should focus on implementing proper input validation and parameterized queries throughout the application codebase. The recommended approach involves sanitizing all user inputs through prepared statements or parameterized queries to prevent SQL injection attacks. Additionally, implementing proper access controls and privilege separation ensures that even if an attacker gains access to a user account, they cannot escalate privileges to administrative levels. The application should also employ proper error handling that does not reveal database structure information to end users. Security measures should include regular input validation, database query auditing, and implementing web application firewalls to detect and block malicious SQL injection attempts. Organizations should also consider implementing least privilege principles for database connections and regularly updating and patching CMS components to address known vulnerabilities. The vulnerability demonstrates the critical importance of proper input validation and parameterization in preventing database injection attacks that can lead to complete system compromise.