Onjuiste Beperking van een Padnaam tot een Beperkte Directory ('Path Traversal') in PHPMemcachedAdmin

The impact of CVE-2023-6026 is severe. An attacker exploiting this vulnerability can leverage the Path Traversal flaw to delete arbitrary files on the server. This includes critical system files, configuration files, and application code. Successful exploitation could lead to a complete denial of service, data loss, and potentially even remote code execution if the attacker can replace deleted files with malicious code. The blast radius extends to any data stored on the server accessible to the PHPMemcachedAdmin instance. This vulnerability shares similarities with other Path Traversal exploits where insufficient input sanitization allows attackers to navigate outside of intended directories.

Organizations running PHPMemcachedAdmin version 1.3.0, particularly those hosting the application on shared hosting environments or with limited security controls, are at significant risk. Systems with weak file permissions or inadequate WAF configurations are especially vulnerable.

• php: Examine web server access logs for requests containing path traversal sequences (e.g., ../). • php: Use find /var/www/html -name 'phpmemcachedadmin.php' to locate the vulnerable file. • generic web: Monitor server logs for unusual file deletion events. • generic web: Check for unexpected files appearing in sensitive directories.

1. 2023-11-30Disclosure

   disclosure

1. Gereserveerd2023-11-08
2. Gepubliceerd2023-11-30
3. Gewijzigd2024-08-02
4. EPSS bijgewerkt2026-04-02

The primary mitigation for CVE-2023-6026 is to upgrade PHPMemcachedAdmin to version 1.3.1 or later, which contains the fix. If an immediate upgrade is not possible due to compatibility issues or downtime constraints, consider implementing temporary workarounds. These may include restricting access to the PHPMemcachedAdmin interface through a Web Application Firewall (WAF) or proxy server, configuring strict access control lists (ACLs) to limit file deletion permissions, and closely monitoring server logs for suspicious activity. After upgrading, verify the fix by attempting to access files outside of the intended directory through the PHPMemcachedAdmin interface; access should be denied.