CVE-2008-7124 in zKup
Summary
by MITRE
zKup CMS 2.0 through 2.3 does not require administrative authentication for admin/configuration/modifier.php, which allows remote attackers to gain administrator privileges via a direct request, as demonstrated by adding a new administrator.
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Analysis
by VulDB Data Team • 10/19/2024
The vulnerability identified as CVE-2008-7124 affects zKup CMS versions 2.0 through 2.3 and represents a critical authentication bypass flaw that fundamentally undermines the security model of the content management system. This vulnerability resides in the administrative configuration file modifier.php which fails to enforce proper administrative authentication checks before allowing access to sensitive administrative functions. The flaw essentially creates an unauthorized access point that bypasses the intended security controls, allowing any remote attacker to directly access administrative interfaces without proper credentials or authorization.
The technical implementation of this vulnerability stems from a missing authentication check within the application's access control mechanism. When an attacker makes a direct request to the admin/configuration/modifier.php endpoint, the system does not verify whether the requesting user possesses administrative privileges before executing administrative operations. This represents a classic failure in the principle of least privilege and demonstrates poor input validation and access control implementation. The vulnerability operates at the application layer and can be exploited through simple HTTP requests without requiring any specialized tools or complex attack vectors.
The operational impact of this vulnerability is severe and far-reaching for any organization using affected zKup CMS versions. An attacker who discovers this vulnerability can immediately escalate their privileges to full administrative access, enabling them to perform any administrative function including but not limited to adding new administrator accounts, modifying existing user permissions, accessing sensitive data, altering website content, and potentially installing malicious code. This privilege escalation capability transforms a simple remote access attempt into a complete system compromise, as demonstrated by the ability to add new administrators, which creates persistent backdoors within the system. The vulnerability affects the confidentiality, integrity, and availability of the affected web application and can lead to complete system takeover.
This vulnerability maps directly to CWE-285, which addresses insufficient authorization issues in software systems, and aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting, as it allows attackers to bypass authentication entirely. The flaw also relates to CWE-306, which covers missing authentication checks, and represents a failure in the application's security architecture that should have implemented proper access control mechanisms. Organizations should immediately implement mitigations including patching to the latest available version of zKup CMS, implementing proper authentication controls, and conducting security audits to identify similar vulnerabilities in other applications. Network segmentation and monitoring of administrative access attempts should also be implemented to detect and prevent exploitation attempts. The vulnerability highlights the critical importance of proper access control implementation and demonstrates why authentication mechanisms must be robustly enforced at every point of the application's interface rather than relying on assumptions about user authorization status.