A vulnerability was found in MTab Bookmark up to 1.2.6 and classified as critical. This issue affects some unknown processing of the file public/install.php of the component Installation. The manipulation leads to improper access controls. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-249395. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Critical vulnerability CVE-2023-7193 in MTab Bookmark versions up to 1.2.6 allows for improper access controls, potentially enabling attackers to gain unauthorized access to the system. The vulnerability resides in the public/install.php file, which, if exploited, could lead to a complete system compromise. The vendor has not responded to the disclosure, making this a high-risk situation.
Step 1: Reconnaissance: The attacker identifies a vulnerable MTab Bookmark installation (version up to 1.2.6). This can be done through banner grabbing, web application scanning, or other reconnaissance techniques.
Step 2: Request Crafting: The attacker crafts a malicious HTTP request targeting public/install.php. The specific payload will depend on the exact nature of the vulnerability, but it likely involves manipulating parameters or data sent to the installation script.
Step 3: Access Control Bypass: The crafted request bypasses the intended access controls, due to a flaw in the authorization or validation logic within install.php.
Step 4: Privilege Escalation: The attacker leverages the bypassed access controls to perform unauthorized actions. This could include creating a new administrative user, modifying configuration settings to gain control, or uploading a malicious web shell.
Step 5: System Compromise: The attacker uses the gained access to further compromise the system, potentially leading to data exfiltration, denial of service, or complete system takeover.
The vulnerability stems from flawed access control mechanisms within the public/install.php file during the installation process of MTab Bookmark. The specific logic flaw likely involves inadequate authorization checks or missing input validation when handling requests related to installation or configuration. This could allow an attacker to bypass intended access restrictions and execute privileged operations, such as creating administrative accounts, modifying database settings, or uploading malicious files. The high complexity and difficulty of exploitation suggest that the vulnerability might involve a combination of factors, such as specific timing conditions, required user interaction, or intricate request manipulation. The lack of vendor response further exacerbates the risk, as no official patches or mitigations are available.