CVE-2017-15684 in Crafter
Summary
by MITRE • 11/27/2020
Crafter CMS Crafter Studio 3.0.1 has a directory traversal vulnerability which allows unauthenticated attackers to view files from the operating system.
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Analysis
by VulDB Data Team • 12/11/2020
The vulnerability identified as CVE-2017-15684 represents a critical directory traversal flaw within Crafter CMS Crafter Studio version 3.0.1. This security weakness enables unauthenticated attackers to access arbitrary files on the underlying operating system through crafted requests that manipulate file path references. The vulnerability stems from insufficient input validation and improper sanitization of user-supplied data that is used to construct file paths within the application's file access mechanisms.
Directory traversal vulnerabilities occur when applications fail to properly validate or sanitize user input before using it in file system operations. In this case, the Crafter Studio application processes user requests without adequate restrictions on path traversal sequences such as "../" or similar constructs that could allow attackers to navigate outside the intended directory boundaries. The vulnerability specifically affects the Crafter Studio component of the Crafter CMS platform, which serves as the content management interface for creating and managing digital content. This flaw exists at the application layer where user input is directly incorporated into file system calls without proper authorization checks or path validation mechanisms.
The operational impact of this vulnerability is severe as it allows attackers to access sensitive system files, configuration data, and potentially confidential information stored on the server. An unauthenticated attacker could exploit this vulnerability to retrieve database configuration files, application credentials, system logs, and other critical data that could lead to further compromise of the system. The vulnerability essentially provides a backdoor into the operating system's file structure, enabling attackers to bypass normal authentication mechanisms and directly access resources that should remain protected. This type of vulnerability can result in complete system compromise, data exfiltration, and potential lateral movement within the network infrastructure.
Mitigation strategies for CVE-2017-15684 should prioritize immediate patching of the Crafter Studio application to the latest version that addresses this directory traversal vulnerability. Organizations should implement proper input validation and sanitization measures to prevent malicious path traversal sequences from being processed by the application. The implementation of proper access controls and file system permissions can help limit the damage even if an attacker manages to exploit the vulnerability. Additionally, network segmentation and firewall rules should be configured to restrict access to the Crafter Studio interface from unauthorized networks. According to CWE standards, this vulnerability maps to CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, and aligns with ATT&CK technique T1083 for discovering file and directory permissions. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other components of the CMS infrastructure. Organizations should also implement web application firewalls to detect and block malicious requests attempting to exploit path traversal vulnerabilities, and maintain comprehensive monitoring of file access patterns to detect potential unauthorized access attempts.