CVE-2017-17102 in Fiyo
Summary
by MITRE
Fiyo CMS 2.0.7 has SQL injection in /system/site.php via $_REQUEST['link'].
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Analysis
by VulDB Data Team • 01/25/2021
The vulnerability CVE-2017-17102 represents a critical sql injection flaw in Fiyo CMS version 2.0.7 that exists within the /system/site.php file. This vulnerability specifically targets the $_REQUEST['link'] parameter, which is processed without adequate input validation or sanitization, creating an exploitable entry point for malicious actors to manipulate the application's database interactions. The flaw allows attackers to inject arbitrary sql commands through the link parameter, potentially enabling unauthorized access to sensitive data, modification of database contents, or complete system compromise.
The technical implementation of this vulnerability stems from improper handling of user-supplied input within the application's request processing pipeline. When the application receives a request containing the link parameter, it directly incorporates this value into sql query construction without appropriate escaping or parameterization techniques. This design flaw aligns with CWE-89, which classifies improper neutralization of special elements used in sql commands as a fundamental weakness in application security. The vulnerability operates at the application layer where user input transitions into database operations, making it particularly dangerous as it can be exploited through simple http requests without requiring elevated privileges or complex attack vectors.
The operational impact of this vulnerability extends beyond simple data theft, as it provides attackers with the capability to execute arbitrary commands on the underlying database server. Successful exploitation could result in complete database compromise, allowing attackers to extract sensitive information including user credentials, personal data, and application configuration details. The vulnerability also enables privilege escalation attacks where attackers might gain administrative access to the cms system, potentially leading to full system compromise. This type of vulnerability falls under ATT&CK technique T1071.004, which covers application layer protocol manipulation, and T1046, which involves network service scanning, as attackers would likely probe for such vulnerabilities before exploiting them.
Mitigation strategies for CVE-2017-17102 require immediate implementation of input validation and parameterized queries to prevent sql injection attacks. Organizations should apply the vendor-provided patch or upgrade to a non-vulnerable version of Fiyo CMS as soon as possible. Additionally, implementing proper input sanitization measures including whitelisting acceptable input values, using prepared statements with parameterized queries, and employing web application firewalls can significantly reduce the attack surface. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other application components, as this flaw demonstrates a pattern of insufficient input validation that may exist elsewhere in the application codebase. The vulnerability also highlights the importance of following secure coding practices and adhering to security standards such as those outlined in the owasp top ten and iso/iec 27001 for preventing common web application security flaws.