CVE-2016-9087 in Exponent
Summary
by MITRE
SQL injection vulnerability in framework/modules/filedownloads/controllers/filedownloadController.php in Exponent CMS 2.3.9 and earlier allows remote attackers to execute arbitrary SQL commands via the fileid parameter.
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Analysis
by VulDB Data Team • 09/29/2022
The CVE-2016-9087 vulnerability represents a critical SQL injection flaw within the Exponent CMS 2.3.9 and earlier versions, specifically targeting the filedownloadController.php module. This vulnerability exists in the framework's handling of user input within the fileid parameter, creating an exploitable entry point for malicious actors to execute arbitrary SQL commands remotely. The flaw stems from inadequate input validation and sanitization practices within the CMS's file download functionality, which processes user-supplied identifiers without proper parameterization or escaping mechanisms. The vulnerability is particularly concerning as it affects the core file management capabilities of the content management system, potentially allowing attackers to gain unauthorized access to sensitive data stored within the database.
The technical exploitation of this vulnerability occurs when an attacker submits a maliciously crafted fileid parameter to the filedownloadController.php script. The application fails to properly sanitize or validate this input before incorporating it into SQL query construction, enabling attackers to inject malicious SQL payloads that can manipulate database operations. This vulnerability aligns with CWE-89, which categorizes SQL injection as a common weakness in web applications where untrusted data is directly embedded into SQL commands. The flaw demonstrates poor input validation practices and highlights the critical importance of implementing proper parameterized queries and input sanitization techniques to prevent such attacks. Attackers can leverage this vulnerability to extract sensitive information, modify database records, or potentially escalate privileges within the CMS environment.
The operational impact of CVE-2016-9087 extends beyond simple data theft, as it provides attackers with a potential pathway for persistent access and system compromise. Successful exploitation can result in complete database compromise, allowing attackers to view, modify, or delete sensitive content including user credentials, configuration data, and potentially the entire website content. This vulnerability affects not only the immediate database operations but also the overall integrity and availability of the CMS platform. The remote nature of the attack means that exploitation can occur from any location without requiring physical access to the system, making it particularly dangerous for organizations relying on Exponent CMS for their web presence. Organizations using vulnerable versions face significant risk of data breaches, reputational damage, and potential regulatory compliance violations.
Organizations should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary recommendation involves upgrading to Exponent CMS versions that have patched this vulnerability, as the vendor has released updates containing proper input validation and sanitization measures. Additionally, implementing proper parameterized queries and input validation at the application level can help prevent similar issues in other components. Network-level protections such as web application firewalls and intrusion detection systems can provide additional monitoring and blocking capabilities for suspicious SQL injection attempts. Database administrators should also implement proper access controls and monitoring to detect unauthorized database activities. This vulnerability demonstrates the importance of following secure coding practices and adheres to ATT&CK technique T1190, which covers the exploitation of vulnerabilities for initial access and privilege escalation within target systems. Regular security assessments and penetration testing should be conducted to identify and remediate similar vulnerabilities across the entire application stack.