CVE-2015-2842 in GoAdmin CE
Summary
by MITRE
Unrestricted file upload vulnerability in go_audiostore.php in the audiostore (Voice Files) upload functionality in GoAutoDial GoAdmin CE 3.x before 3.3-1421902800 allows remote attackers to execute arbitrary code by uploading a file with an executable extension, then accessing it via a direct request to the file in sounds/.
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Analysis
by VulDB Data Team • 01/22/2025
The CVE-2015-2842 vulnerability represents a critical unrestricted file upload flaw in the GoAutoDial GoAdmin CE 3.x software suite, specifically within the go_audiostore.php component that handles audiostore functionality. This vulnerability exists in versions prior to 3.3-1421902800 and exposes the system to remote code execution attacks through a seemingly simple but dangerous flaw in file validation mechanisms. The vulnerability is particularly concerning because it allows attackers to upload malicious files with executable extensions directly into the sounds/ directory, which serves as a critical audio file storage location for the application's voice file functionality.
The technical exploitation of this vulnerability hinges on the absence of proper file type validation and sanitization within the upload process. Attackers can bypass security restrictions by uploading files with extensions such as .php, .asp, .jsp, or other executable formats that the system does not properly filter. When these malicious files are uploaded to the sounds/ directory, they become directly accessible via web requests, allowing remote attackers to execute arbitrary code on the target system. This flaw stems from inadequate input validation and the lack of proper file extension checking, which are fundamental security measures that should prevent the upload of potentially dangerous file types. The vulnerability directly maps to CWE-434, which describes the weakness of unrestricted upload of file with dangerous type, and represents a classic example of insecure file upload handling.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with persistent remote code execution capabilities on the affected system. Once successfully exploited, attackers can gain full control over the server hosting the GoAutoDial application, potentially leading to complete system compromise, data exfiltration, and establishment of persistent backdoors. The vulnerability affects not just the immediate application but can serve as a foothold for broader network attacks, especially if the server hosts additional services or applications. The attack vector is particularly dangerous because it requires no special privileges or authentication, making it accessible to any remote attacker who can reach the vulnerable web application. This vulnerability aligns with ATT&CK technique T1190, which describes the use of exploitation for execution through web application vulnerabilities.
Mitigation strategies for CVE-2015-2842 must address both the immediate vulnerability and establish robust long-term security practices. The primary solution involves implementing comprehensive file type validation that rejects executable file extensions and enforces strict content verification of uploaded files. Organizations should immediately upgrade to GoAutoDial GoAdmin CE version 3.3-1421902800 or later, which contains the necessary patches to address this vulnerability. Additional protective measures include implementing proper file upload restrictions by using whitelisting approaches for allowed file extensions, storing uploaded files outside the web root directory, and implementing proper file permission controls. Security practitioners should also consider implementing web application firewalls to detect and block suspicious file upload attempts, and establish monitoring procedures to detect unauthorized file uploads. The vulnerability underscores the importance of following secure coding practices and implementing defense-in-depth strategies that include proper input validation, output encoding, and access control mechanisms to prevent similar issues in other components of the application stack.