CVE-2011-4832 in CaupoShop Pro
Summary
by MITRE
Directory traversal vulnerability in CaupoShop Pro 2.x, CaupoShop Classic 3.01, and CaupoShop Pro 3.70 and earlier allows remote attackers to read arbitrary files via a .. (dot dot) in the template parameter in a template action.
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Analysis
by VulDB Data Team • 12/07/2024
The vulnerability identified as CVE-2011-4832 represents a critical directory traversal flaw affecting multiple versions of CaupoShop e-commerce software including Pro 2.x, Classic 3.01, and Pro 3.70 and earlier versions. This vulnerability resides in the template handling mechanism of the application where user-supplied input is not properly sanitized before being used to construct file paths. The flaw specifically manifests when the template parameter in the template action contains directory traversal sequences using the .. (dot dot) notation, allowing malicious actors to navigate outside the intended directory structure and access arbitrary files on the server filesystem.
The technical exploitation of this vulnerability follows the classic directory traversal pattern where attackers can manipulate the template parameter to include sequences such as ../../etc/passwd or similar paths that would normally be restricted. This occurs due to insufficient input validation and path sanitization within the application's file access routines. The vulnerability maps directly to CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a well-documented weakness in software security practices where applications fail to properly validate or sanitize file paths before use. The flaw demonstrates poor input validation and inadequate access control mechanisms that allow unauthorized file system access through crafted requests.
Operationally, this vulnerability presents significant risks to affected systems as remote attackers can potentially access sensitive files including configuration files, database credentials, application source code, and other confidential data stored on the server. The impact extends beyond simple information disclosure to potentially enable further exploitation including arbitrary code execution if sensitive configuration files contain executable code or if the application's file handling mechanisms can be leveraged for additional attacks. The remote nature of this vulnerability means that attackers do not require local system access or physical presence to exploit the flaw, making it particularly dangerous for web applications. Attackers could use this vulnerability to gain insights into the application architecture, identify other potential weaknesses, and potentially escalate privileges within the system.
The mitigation strategy for CVE-2011-4832 requires immediate implementation of proper input validation and sanitization procedures for all user-supplied parameters, particularly those used in file path construction. Organizations should implement strict path validation that prevents directory traversal sequences from being processed, ensuring that all file access operations occur within predetermined safe directories. This includes implementing proper access control lists and ensuring that the application runs with minimal required privileges. Additionally, the affected versions of CaupoShop should be updated to patched releases that address this vulnerability, as the vendor has likely provided security updates to resolve this issue. System administrators should also implement network monitoring and intrusion detection systems to identify potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1083 - File and Directory Discovery, which describes methods attackers use to enumerate file systems and identify sensitive files, making this vulnerability particularly concerning for organizations that store sensitive data on affected systems. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other applications within the organization's infrastructure.