aikcms_v2.0.0 Unrestricted File Upload Scanner

The aikcms_v2.0.0 software is a content management system used by various websites for managing web content. It is utilized by web developers to easily create, edit, and manage digital content, primarily for web publishing purposes. The CMS provides users with user-friendly interfaces for managing content without requiring in-depth technical knowledge. This system can be deployed by companies of varying sizes, from small to large enterprises, and is characterized by its flexibility and versatility. In particular, it allows customized website setups, which makes it extremely popular among those looking for tailor-made web solutions. Additionally, aikcms is continuously updated and maintained to provide better service and security to its users.

The unrestricted file upload vulnerability in aikcms_v2.0.0 can allow attackers to upload files of their choosing to the server. This happens when file type restrictions are improperly configured, allowing potentially malicious files with extensions such as ".php" to be uploaded. Attackers exploit this vulnerability by uploading a file, such as a shell script, that can execute commands on the server. The vulnerability is particularly serious because it enables unauthorized execution of code on the server, and can lead to complete server compromise. It reflects a common security misconfiguration in web applications, where insufficient validation of incoming files presents a severe risk. Adequate file type validation and stringent file permission settings are essential to mitigate this vulnerability.

Vulnerability details show that without extension restrictions, attackers can upload executable files (e.g., PHP files) onto the server. For instance, a payload like "abcdefg.php" with an embedded PHP code is used to check for the vulnerability. Typically, this code contains a command to execute, which, if run successfully, indicates the system's vulnerability. Affected endpoints include the file upload functionality found in "admin/page/system/nav.php." This suggests that the authentication mechanisms for file upload are weak or entirely absent, allowing direct file uploads with executable content. Another crucial factor is the misuse of Content-Type headers which can be manipulated to pass executable files as safe file types.

If successfully exploited, the impact of an unrestricted file upload vulnerability is significant and far-reaching. Malicious users can execute arbitrary code that could alter the file system, access sensitive data, or disrupt services, leading to Denial of Service (DoS). The control of the server can be seized, allowing threats such as ransomware installation or unauthorized data manipulation or extraction. Additionally, it poses a direct risk to business continuity, potentially leading to financial losses and reputational damage. Organizations may also face regulatory penalties if data breaches occur due to such exploitations.