CVE-2024-4388 in cas Plugin
Summary
by MITRE • 05/23/2024
This does not validate a path generated with user input when downloading files, allowing unauthenticated user to download arbitrary files from the server
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Analysis
by VulDB Data Team • 05/23/2024
This vulnerability represents a critical path traversal flaw that exists within the file download functionality of the affected system. The vulnerability stems from insufficient input validation mechanisms that fail to properly sanitize user-provided paths before processing file download requests. When users submit file paths through input fields or parameters, the system directly incorporates these inputs into the file system operations without adequate sanitization or validation checks. This allows malicious actors to manipulate the path traversal logic and access files that should remain protected or restricted. The vulnerability is particularly dangerous because it operates without authentication requirements, meaning any user can potentially exploit it to gain unauthorized access to sensitive server files. The flaw enables attackers to navigate through the file system hierarchy and retrieve arbitrary files, potentially including configuration files, database credentials, application source code, or other sensitive data that should not be publicly accessible. This type of vulnerability is classified under CWE-22 Path Traversal which specifically addresses the issue of insufficient input validation in file system operations. The attack vector is straightforward and can be executed through simple manipulation of file path parameters, making it highly exploitable by threat actors with minimal technical expertise. The vulnerability aligns with ATT&CK technique T1074 Data Staged, as it provides a method for attackers to obtain sensitive data from the system through unauthorized file access. The impact extends beyond simple data exposure, as successful exploitation could lead to further system compromise through the acquisition of configuration details, credential files, or application source code that might reveal additional attack surfaces.
The operational implications of this vulnerability are severe and multifaceted across multiple security domains. Organizations utilizing affected systems face immediate risks of data leakage, including sensitive corporate information, intellectual property, and potentially personal data of users or customers. The lack of authentication requirements means that the vulnerability can be exploited by anyone with access to the system, including automated scanning tools and malicious actors. Attackers can systematically enumerate and download files from the server, potentially leading to complete system compromise through the acquisition of database connection strings, API keys, cryptographic keys, or application configuration files. The vulnerability also impacts system integrity as attackers can access and potentially modify system files or configuration settings through the downloaded files. This type of vulnerability typically requires minimal computational resources to exploit, making it attractive to attackers who may use automated tools to scan for and exploit these weaknesses across multiple systems. The vulnerability's impact is amplified by its potential to serve as a foothold for further attacks, as the downloaded files often contain information that can be used for privilege escalation, lateral movement, or additional exploitation techniques. Organizations may face regulatory compliance issues if sensitive data is accessed and potentially exposed due to this vulnerability, particularly in environments governed by standards such as gdpr, hipaa, or pci dss.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues. The primary fix involves implementing robust input validation and sanitization for all user-provided paths, ensuring that any input containing path traversal sequences such as .. or / is properly filtered or rejected. Organizations should implement a whitelist approach for file access, where only explicitly allowed file paths or patterns are permitted, rather than relying on blacklisting techniques that can be bypassed. The implementation of proper access controls and authentication mechanisms should be enforced for all file download operations, ensuring that only authorized users can access specific files or directories. Additionally, organizations should implement proper file system permissions and ensure that the application runs with minimal required privileges to reduce the potential impact of successful exploitation. Regular security testing including automated vulnerability scanning and manual penetration testing should be conducted to identify similar path traversal vulnerabilities in other components of the system. The use of secure coding practices and input validation libraries can help prevent such issues from occurring in future development cycles. Organizations should also implement monitoring and logging for file access operations to detect and respond to suspicious activities that may indicate exploitation attempts. This vulnerability serves as a reminder of the critical importance of input validation in web applications and the need for comprehensive security testing throughout the software development lifecycle. The remediation process should include not only fixing the immediate vulnerability but also conducting thorough code reviews to identify and address similar patterns that might exist elsewhere in the application codebase.