CVE-2006-5668 in Ampache
Summary
by MITRE
Unspecified vulnerability in Ampache 3.3.2 and earlier, when register_globals is enabled, allows remote attackers to bypass security restrictions and gain guest access.
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Analysis
by VulDB Data Team • 04/26/2026
The vulnerability identified as CVE-2006-5668 represents a critical security flaw in Ampache versions 3.3.2 and earlier that exploits a dangerous configuration setting. This issue specifically targets systems where the PHP register_globals directive is enabled, creating a dangerous environment where attacker-controlled variables can override legitimate application variables. The vulnerability allows remote attackers to bypass intended security restrictions and obtain guest access to the application. This type of vulnerability falls under the category of insecure direct object reference and improper input validation, as described in CWE-284 for improper access control and CWE-20 for improper input validation. The flaw demonstrates how legacy PHP configurations can create exploitable conditions that allow unauthorized access to application resources.
The technical mechanism behind this vulnerability stems from the dangerous behavior of PHP's register_globals feature, which automatically creates global variables from request parameters. When this setting is enabled, user-supplied input can directly influence the application's variable namespace, allowing attackers to manipulate application logic through crafted HTTP requests. In the context of Ampache, this misconfiguration enables attackers to bypass authentication mechanisms and gain unauthorized guest access to the media streaming application. The vulnerability operates at the application layer and requires remote exploitation, making it particularly dangerous as it can be triggered from any location without requiring physical access to the system. This represents a classic example of how insecure default configurations can undermine even well-designed security controls, aligning with ATT&CK technique T1068 for exploit for privilege escalation.
The operational impact of this vulnerability extends beyond simple unauthorized access, as guest access can provide attackers with significant information disclosure capabilities and potential pathways for further exploitation. Attackers can leverage the guest account to enumerate media libraries, discover system configurations, and potentially identify additional vulnerabilities within the application. The vulnerability's remote nature means that exploitation can occur from anywhere on the internet, making it particularly concerning for publicly accessible systems. Organizations running vulnerable versions of Ampache face risks of data exposure, potential service disruption, and possible lateral movement within their network infrastructure. The lack of specific error handling and input validation in the affected versions means that attackers can systematically manipulate application state to achieve their objectives.
Mitigation strategies for this vulnerability require immediate action to address the root cause. The primary recommendation is to disable the register_globals directive in PHP configuration, which will prevent the automatic creation of global variables from request parameters. System administrators should also upgrade to a supported version of Ampache that properly handles authentication and access control without relying on dangerous PHP configurations. Additional protective measures include implementing proper input validation, using secure coding practices that avoid direct variable manipulation, and deploying web application firewalls to monitor for suspicious parameter manipulation attempts. Organizations should conduct comprehensive vulnerability assessments to identify other applications with similar misconfigurations and ensure that all PHP applications are configured with security best practices. The remediation process should also include monitoring for exploitation attempts and implementing proper access logging to detect unauthorized access patterns. This vulnerability highlights the critical importance of secure configuration management and demonstrates how seemingly minor configuration settings can have significant security implications, reinforcing the principles outlined in security frameworks such as NIST SP 800-125 for secure system configuration practices.