CVE-2009-3188 in phpSANE
Summary
by MITRE
PHP remote file inclusion vulnerability in save.php in phpSANE 0.5.0 allows remote attackers to execute arbitrary PHP code via a URL in the file_save parameter.
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Analysis
by VulDB Data Team • 12/09/2024
The CVE-2009-3188 vulnerability represents a critical remote file inclusion flaw in phpSANE version 0.5.0 that exposes systems to arbitrary code execution. This vulnerability specifically affects the save.php script within the phpSANE application, creating a pathway for malicious actors to inject and execute unauthorized PHP code on affected servers. The flaw stems from insufficient input validation and sanitization of the file_save parameter, which directly influences the file inclusion mechanism within the application's codebase.
The technical implementation of this vulnerability leverages the inherent capabilities of PHP's include or require functions, which can dynamically load and execute external files. When an attacker supplies a malicious URL through the file_save parameter, the vulnerable application processes this input without proper validation, allowing the remote file to be included and executed within the server context. This type of vulnerability falls under the Common Weakness Enumeration category CWE-88, which specifically addresses improper neutralization of special elements used in an expression, particularly in the context of command and buffer injection attacks. The vulnerability demonstrates a classic lack of input sanitization and proper parameter validation that enables attackers to manipulate the application's execution flow.
From an operational impact perspective, this vulnerability creates severe security implications for organizations running affected phpSANE installations. Remote attackers can leverage this flaw to execute arbitrary commands on the target server, potentially gaining full control over the system and establishing persistent backdoors. The attack surface extends beyond simple code execution to include data exfiltration, system compromise, and lateral movement within network environments. This vulnerability directly aligns with several tactics outlined in the MITRE ATT&CK framework, particularly those related to command and control operations and privilege escalation. The vulnerability enables adversaries to establish a foothold that can be used for further reconnaissance and exploitation activities.
Mitigation strategies for CVE-2009-3188 must address both immediate remediation and long-term security hardening measures. The primary recommendation involves upgrading to a patched version of phpSANE that properly validates and sanitizes all user-supplied input parameters. Organizations should implement strict input validation mechanisms that reject any non-local file references and enforce proper parameter sanitization before processing. Security configurations should disable remote file inclusion capabilities in PHP settings through appropriate ini directives, specifically targeting the allow_url_include directive. Network-level protections including firewall rules and web application firewalls can provide additional layers of defense by blocking suspicious URL patterns and monitoring for known attack signatures. Regular security assessments and vulnerability scanning should be conducted to identify similar flaws in other applications and ensure comprehensive protection against remote file inclusion attacks. The remediation process must also include comprehensive security training for developers to prevent similar issues in future application development cycles.