CVE-2007-2777 in Template Seller
Summary
by MITRE
Unrestricted file upload vulnerability in admin/addsptemplate.php in AlstraSoft Template Seller Pro 3.25 and earlier allows remote attackers to execute arbitrary PHP code via an arbitrary .php filename in the zip parameter, which is created under sptemplates/.
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Analysis
by VulDB Data Team • 09/17/2024
The vulnerability described in CVE-2007-2777 represents a critical unrestricted file upload flaw in AlstraSoft Template Seller Pro version 3.25 and earlier. This vulnerability exists within the administrative component of the application, specifically in the file admin/addsptemplate.php which handles template addition functionality. The flaw allows remote attackers to bypass normal file upload restrictions and execute arbitrary PHP code on the target system. The vulnerability is particularly dangerous because it enables attackers to upload malicious files that can be executed as PHP code, potentially leading to complete system compromise.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the file upload mechanism. When users attempt to upload template files through the zip parameter, the application fails to properly validate the file extensions or content of the uploaded archives. This allows attackers to upload zip files containing PHP files with .php extensions that are subsequently extracted and stored in the sptemplates/ directory. The lack of proper file type checking and directory traversal restrictions creates an exploitable path where attacker-controlled PHP code can be placed in a location where it will be executed by the web server.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and potential data breaches. Attackers can leverage this vulnerability to upload backdoor scripts, web shells, or other malicious payloads that provide persistent access to the compromised system. The sptemplates/ directory serves as an execution environment where uploaded PHP files can be accessed through web requests, enabling attackers to perform various malicious activities including data exfiltration, privilege escalation, and further network reconnaissance. This vulnerability directly aligns with CWE-434 which defines unrestricted file upload as a dangerous practice that can lead to arbitrary code execution.
The attack vector for this vulnerability involves a simple HTTP request to the vulnerable admin/addsptemplate.php endpoint with a specially crafted zip file containing malicious PHP code. The vulnerability operates at the application layer and requires no authentication for exploitation, making it particularly dangerous for publicly accessible web applications. This aligns with ATT&CK technique T1190 which describes the exploitation of vulnerabilities in web applications to gain initial access. The lack of proper access controls and input validation creates a direct path for remote code execution that can be exploited by any attacker with network access to the vulnerable system.
Mitigation strategies for this vulnerability should focus on implementing comprehensive file upload restrictions and input validation mechanisms. Organizations should ensure that all file uploads are properly validated for both file type and content, with strict restrictions on executable file extensions. The application should employ proper file name sanitization and directory access controls to prevent malicious files from being executed. Additionally, the system should implement proper access controls to limit administrative functionality to authorized users only. This vulnerability demonstrates the critical importance of following secure coding practices and implementing proper input validation as outlined in OWASP Top 10 and other security standards. The remediation process should include immediate patching of the application, implementation of file upload restrictions, and comprehensive security testing to ensure similar vulnerabilities are not present in other components of the system.