CVE-2024-8409 in ABCD2
Summary
by MITRE • 09/04/2024
A vulnerability classified as problematic has been found in ABCD ABCD2 up to 2.2.0-beta-1. This affects an unknown part of the file /common/show_image.php. The manipulation of the argument image leads to path traversal: '../filedir'. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 09/06/2024
This vulnerability represents a critical path traversal flaw in the ABCD ABCD2 content management system affecting versions up to 2.2.0-beta-1. The issue resides within the /common/show_image.php file where improper input validation allows attackers to manipulate the image parameter to access arbitrary files on the server. The specific payload '../filedir' demonstrates how an attacker can traverse directory structures to access sensitive files that should remain protected. This vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it accessible to any attacker with knowledge of the affected system. The path traversal mechanism enables access to files outside the intended directory scope, potentially exposing configuration files, database credentials, user data, or system files that could compromise the entire server infrastructure.
The technical exploitation of this vulnerability follows established patterns documented in CWE-22, which classifies path traversal issues as a fundamental weakness in input validation. Attackers can leverage this flaw to bypass normal access controls and retrieve unauthorized files from the server filesystem. The remote exploitation capability places this vulnerability in the ATT&CK framework under the T1083 technique for discovering files and directories, while also aligning with T1566 for initial access through web application attacks. The lack of vendor response after early disclosure creates a particularly concerning scenario where organizations remain exposed to a known vulnerability without official patches or mitigation guidance, potentially leaving systems vulnerable to active exploitation by threat actors who may have already discovered and weaponized this flaw.
Organizations utilizing affected versions of ABCD ABCD2 should immediately implement defensive measures to protect against this vulnerability. The most effective immediate mitigation involves implementing strict input validation on the image parameter within the show_image.php file, ensuring that all user-supplied input is properly sanitized and normalized before processing. Web application firewalls should be configured to detect and block path traversal attempts, particularly those involving sequences such as '../' or similar directory traversal patterns. Additionally, implementing proper access controls and ensuring that the application runs with minimal necessary privileges can significantly reduce the impact of successful exploitation attempts. Organizations should also conduct comprehensive file system audits to identify any sensitive files that might be accessible through this vulnerability and consider implementing mandatory access controls or file system permissions that prevent unauthorized access to critical system resources. The absence of vendor response underscores the importance of proactive security measures and the need for organizations to maintain independent vulnerability assessment capabilities to protect against unpatched software flaws.