CVE-2002-0513 in popper_mod
Summary
by MITRE
The PHP administration script in popper_mod 1.2.1 and earlier relies on Apache .htaccess authentication, which allows remote attackers to gain privileges if the script is not appropriately configured by the administrator.
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Analysis
by VulDB Data Team • 09/16/2025
The vulnerability described in CVE-2002-0513 represents a critical security flaw in the popper_mod 1.2.1 and earlier versions of a PHP-based administration script. This issue stems from the script's reliance on Apache .htaccess authentication mechanisms for access control, creating a dangerous dependency that can be exploited by remote attackers when proper administrative configuration is lacking. The vulnerability exists within the web application's authentication architecture where the system assumes that Apache-level authentication will provide adequate security boundaries for administrative functions.
The technical flaw manifests when administrators fail to properly configure the .htaccess file or when the web server configuration does not adequately enforce the authentication requirements. This creates a privilege escalation vector where attackers can bypass the intended access controls and gain administrative privileges without proper authentication. The vulnerability is classified as a weakness in authentication mechanisms, specifically related to insufficient access control enforcement, and aligns with CWE-285 which addresses improper authorization in authentication systems. The flaw essentially allows attackers to exploit misconfigured server-level authentication to gain unauthorized administrative access to the PHP administration script.
The operational impact of this vulnerability is significant as it enables remote attackers to execute privilege escalation attacks against systems running vulnerable versions of popper_mod. Once exploited, attackers can gain full administrative control over the affected web application, potentially leading to complete system compromise, data theft, or unauthorized modifications to the application's functionality. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the system or prior authentication credentials. This vulnerability directly impacts the confidentiality, integrity, and availability of the affected systems, making it a critical concern for organizations running vulnerable web applications.
Mitigation strategies for this vulnerability require immediate administrative action to ensure proper configuration of Apache .htaccess files and verification of authentication mechanisms. System administrators should implement additional layers of authentication beyond Apache-level controls, such as implementing proper PHP-based authentication within the application itself. The recommended approach includes enforcing multi-factor authentication, regularly auditing access controls, and implementing proper security configurations that do not rely solely on server-level authentication mechanisms. Organizations should also consider implementing network segmentation, intrusion detection systems, and regular security assessments to identify and remediate similar configuration vulnerabilities. This vulnerability demonstrates the importance of defense in depth and proper security configuration practices, aligning with ATT&CK technique T1078 which addresses valid accounts and privilege escalation through proper authentication mechanisms. The remediation process should involve comprehensive security hardening of web server configurations and regular security training for administrators to prevent similar misconfigurations in the future.