CVE-2007-3936 in A-shop
Summary
by MITRE
Directory traversal vulnerability in admin/filebrowser.asp in A-shop 0.70 and earlier, and possibly 0.71, allows remote attackers to delete arbitrary files via unspecified filename references in the delfiles parameter.
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Analysis
by VulDB Data Team • 09/26/2024
The vulnerability identified as CVE-2007-3936 represents a critical directory traversal flaw affecting A-shop versions 0.70 and earlier, with potential impact on version 0.71. This security weakness resides within the admin/filebrowser.asp component of the web application, which processes user input through the delfiles parameter to handle file deletion operations. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly filter or escape user-supplied data before processing file system operations. Attackers can exploit this weakness by crafting malicious requests that manipulate the delfiles parameter to reference files outside the intended directory structure, enabling unauthorized file deletion across the system.
The technical implementation of this vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This flaw operates by allowing attackers to traverse the file system hierarchy using directory navigation sequences such as ../ or ..\ to access and manipulate files beyond the designated administrative boundaries. The vulnerability is particularly dangerous because it enables remote code execution capabilities through file deletion operations, potentially leading to complete system compromise. Attackers can leverage this weakness to remove critical system files, application components, or sensitive data files, thereby disrupting service availability and potentially creating backdoor access points for further exploitation.
The operational impact of CVE-2007-3936 extends beyond immediate file deletion capabilities, as it represents a foundational security weakness that undermines the integrity and availability of the entire web application infrastructure. This vulnerability directly affects the principle of least privilege and proper access control mechanisms, as it allows unauthenticated or privileged users to bypass normal file system access controls. The implications include potential data loss, service disruption, and system compromise that can be exploited as part of broader attack chains. From an operational security perspective, this vulnerability enables attackers to perform destructive operations that may require extensive system recovery efforts and can lead to compliance violations in regulated environments.
Mitigation strategies for CVE-2007-3936 must address both immediate remediation and long-term architectural improvements to prevent similar vulnerabilities. The primary solution involves implementing comprehensive input validation and sanitization for all user-supplied data, particularly parameters used in file system operations. This includes implementing strict path validation that ensures file references remain within designated directories and rejecting any input containing directory traversal sequences. Security measures should also incorporate proper access control mechanisms, input encoding, and output validation to prevent malicious data from being processed by the application. Organizations should consider implementing web application firewalls and intrusion detection systems to monitor for exploitation attempts. Additionally, regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities throughout the application lifecycle, following established security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines to ensure comprehensive protection against directory traversal attacks.