CVE-2017-17794 in BlogoText
Summary
by MITRE
validate_form_preferences in admin/preferences.php in BlogoText through 3.7.6 allows attackers to bypass intended access restrictions via vectors related to an e-mail address field.
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Analysis
by VulDB Data Team • 01/18/2023
The vulnerability identified as CVE-2017-17794 affects BlogoText version 3.7.6 and earlier, specifically within the admin/preferences.php file where the validate_form_preferences function operates. This security flaw represents a critical access control bypass issue that undermines the application's administrative protection mechanisms. The vulnerability manifests through manipulation of the email address field during form validation processes, allowing unauthorized users to circumvent intended authentication and authorization checks that should restrict access to administrative preferences.
The technical implementation of this vulnerability stems from insufficient input validation and access control enforcement within the administrative preference management system. When users submit form data through the preferences interface, the validate_form_preferences function fails to properly verify user credentials or roles before processing email address field modifications. This oversight creates a pathway for attackers to exploit the system's trust model, enabling them to modify administrative settings without proper authorization. The flaw specifically targets the email address field as an attack vector, suggesting that the validation logic may not adequately distinguish between legitimate administrative actions and malicious attempts to escalate privileges.
From an operational impact perspective, this vulnerability poses significant risks to BlogoText installations as it allows attackers to gain unauthorized access to administrative functions. An attacker who successfully exploits this vulnerability could modify critical system settings, alter user permissions, access sensitive configuration data, or potentially establish persistent access points within the application. The implications extend beyond simple preference modifications, as administrative access typically provides privileges to manage content, users, and system configurations that could lead to complete system compromise. The vulnerability affects all users who have access to the administrative interface, making it particularly dangerous in environments where multiple users interact with the blog platform.
The security implications align with CWE-285, which addresses improper authorization issues in software systems, and can be categorized under ATT&CK technique T1078 for valid accounts and T1548 for abuse of privileges. Organizations using affected BlogoText versions should immediately implement mitigations including applying the latest security patches, reviewing and strengthening access controls, and monitoring for unauthorized administrative activities. Additional protective measures include implementing network segmentation, enforcing strict authentication mechanisms, and conducting regular security audits of administrative interfaces. The vulnerability highlights the critical importance of proper input validation and access control implementation in web applications, particularly within administrative components where privilege escalation opportunities can have severe consequences.