CVE-2022-25848 in static-dev-server
Summary
by MITRE • 11/29/2022
This affects all versions of package static-dev-server. This is because when paths from users to the root directory are joined, the assets for the path accessed are relative to that of the root directory.
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Analysis
by VulDB Data Team • 04/24/2025
The vulnerability identified as CVE-2022-25848 affects the static-dev-server package across all its versions, representing a critical path traversal flaw that enables unauthorized access to system resources. This issue stems from improper handling of user-provided paths during file system operations, specifically when joining user inputs with the root directory path. The flaw occurs at the core of how the server processes incoming requests, creating a dangerous condition where external inputs can manipulate the file system resolution mechanism.
The technical implementation of this vulnerability resides in the path joining functionality where user-supplied paths are concatenated with the root directory without proper validation or sanitization. When a user provides a path that includes directory traversal sequences such as ../ or ..\, these sequences are not adequately filtered or normalized before being joined with the root directory path. This results in the server resolving file requests to locations outside the intended serving directory, potentially exposing sensitive system files, configuration data, or other assets that should remain protected from direct access.
From an operational impact perspective, this vulnerability creates significant security risks for systems utilizing the static-dev-server package in development or testing environments. Attackers can leverage this flaw to access files that are not meant to be publicly available, including but not limited to server configuration files, database credentials, source code repositories, or other sensitive data that might be stored within the system's file hierarchy. The vulnerability essentially allows for arbitrary file reading capabilities that can compromise the confidentiality and integrity of the affected system.
The flaw aligns with CWE-22 Path Traversal vulnerability classification, which specifically addresses the issue of improper handling of file paths that allows attackers to access files and directories outside the intended scope. This vulnerability also maps to ATT&CK technique T1083 File and Directory Discovery, as it enables adversaries to enumerate and access files that would normally be restricted. The attack surface is particularly concerning in development environments where static-dev-server is commonly used, as these environments often contain sensitive information such as API keys, database connection strings, or application source code that could be accessed through this vulnerability.
Mitigation strategies for CVE-2022-25848 should focus on implementing robust input validation and path normalization mechanisms within the static-dev-server package. The most effective approach involves sanitizing all user-provided paths by removing or encoding directory traversal sequences before joining them with the root directory path. Additionally, implementing proper path resolution that ensures all file operations occur within a designated safe directory, using techniques such as chroot jails or virtual file system isolation, can prevent unauthorized access to system resources. Organizations should also consider upgrading to patched versions of the static-dev-server package when available, while maintaining proper network segmentation and access controls to limit the potential impact of any exploitation attempts. Regular security audits and input validation testing should be implemented to prevent similar vulnerabilities from emerging in other components of the system architecture.