CVE-2009-3447 in I-Load
Summary
by MITRE
Unrestricted file upload vulnerability in RADactive I-Load before 2008.2.5.0 allows remote attackers to execute arbitrary code by uploading a file with an executable extension, and then sending a request for a predictable filename during a short time window.
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Analysis
by VulDB Data Team • 01/22/2019
The CVE-2009-3447 vulnerability represents a critical unrestricted file upload flaw in RADactive I-Load software versions prior to 2008.2.5.0, which fundamentally compromises the security posture of affected systems through a well-known exploitation pattern. This vulnerability falls under the broader category of insecure file handling within web applications and aligns with CWE-434 which specifically addresses Unrestricted Upload of File with Dangerous Type. The flaw enables remote attackers to bypass normal file validation mechanisms by uploading malicious files with executable extensions such as .asp, .aspx, .php, or .jsp, thereby creating a persistent backdoor within the target environment.
The technical implementation of this vulnerability exploits the lack of proper input validation and sanitization during file upload processes. When users upload files through the I-Load application, the system fails to adequately verify file extensions, MIME types, or file contents before storing them on the server. This omission creates a dangerous scenario where attackers can predictably upload malicious payloads and subsequently execute them by requesting specific filenames during a narrow time window when the system processes these files. The vulnerability specifically targets the application's file handling logic, which should enforce strict validation but instead permits the storage of executable content without proper security checks.
The operational impact of this vulnerability extends beyond simple code execution to encompass full system compromise and potential lateral movement within network environments. Attackers can leverage this flaw to deploy web shells, reverse shells, or other malicious payloads that provide persistent access to compromised systems. The short time window mentioned in the vulnerability description indicates that the attack must be executed quickly after upload, suggesting that the system's file processing or caching mechanisms create a temporal vulnerability window. This timing aspect makes the exploitation more challenging but also more targeted, as attackers must coordinate their upload and execution phases carefully.
Organizations affected by CVE-2009-3447 face significant security risks including data breaches, unauthorized access, and potential system takeover. The vulnerability directly relates to ATT&CK technique T1190 which covers Exploit Public-Facing Application, and T1059 which addresses Command and Scripting Interpreter, as attackers can execute arbitrary commands through uploaded malicious files. The threat landscape for this vulnerability includes both automated scanning tools that target known vulnerable applications and sophisticated threat actors who may use this entry point for more extensive attacks. The persistence mechanism provided by uploaded executables allows attackers to maintain access even after initial compromise, making this vulnerability particularly dangerous for enterprise environments where continuous monitoring is essential.
Mitigation strategies for CVE-2009-3447 require immediate patching of affected systems to version 2008.2.5.0 or later, which presumably includes proper file validation and sanitization mechanisms. Organizations should implement comprehensive file upload restrictions including MIME type validation, extension filtering, and content-based verification to prevent the storage of executable files. Additional defensive measures include implementing proper file access controls, disabling unnecessary file upload capabilities, and deploying web application firewalls that can detect and block suspicious file upload patterns. The remediation process should also include thorough security testing of file handling components and regular vulnerability assessments to identify similar flaws in other applications within the organization's attack surface.