CVE-2026-43851 in ADAM-3600
Summary
by MITRE • 10/20/2026
A path traversal vulnerability could allow an authenticated attacker to read arbitrary files on the system.
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Analysis
by VulDB Data Team • 10/20/2026
The identified security flaw represents a classic directory traversal or path manipulation vulnerability within an application's file handling logic. This type of weakness typically arises when software constructs file paths using user-supplied input without adequately sanitizing special characters such as dot-dot-slash sequences, which are designed to navigate up the directory hierarchy. In this specific instance, the vulnerability is accessible only to authenticated users, indicating that while a basic layer of access control exists, it fails to enforce proper restrictions on resource access based on identity or privilege level. The core technical failure lies in the insufficient validation of file path inputs before they are passed to operating system functions responsible for reading files. An attacker can exploit this by injecting maliciously crafted strings into request parameters that manipulate the intended directory structure, effectively bypassing application-level boundaries and accessing sensitive data stored outside the expected web root or application sandbox.
From a technical perspective, this vulnerability aligns with CWE-22: Improper Limitation of a Pathname to a Restricted Directory. The flaw allows an authenticated actor to read arbitrary files on the system, which can lead to severe confidentiality breaches depending on the sensitivity of the accessible data. If the underlying application runs with elevated privileges or if critical configuration files, source code, password hashes, or internal API keys are located in traversable directories, the impact extends beyond simple information disclosure. The attacker could potentially extract database credentials stored in configuration files, read private SSL certificates, or access log files containing sensitive operational data. This capability significantly expands the attack surface by providing a foothold for further exploitation, such as remote code execution if combined with other vulnerabilities like deserialization flaws or insecure file uploads that allow writing to accessible directories.
In terms of threat modeling and industry frameworks, this vulnerability is frequently associated with ATT&CK technique T1083: File and Directory Discovery. The attacker uses the traversal mechanism to enumerate and access restricted resources, which serves as a critical step in post-exploitation activities aimed at gathering intelligence for lateral movement or privilege escalation. While the requirement for authentication reduces the immediate risk compared to unauthenticated variants, it does not eliminate the severity of the issue. Internal threats or compromised legitimate accounts can leverage this flaw to exfiltrate data that should be strictly isolated from user-facing applications. The presence of an authentication gate suggests a misconfiguration in role-based access control where file read permissions are granted too broadly rather than being scoped tightly to specific, necessary resources for each user role.
Mitigation strategies must focus on implementing robust input validation and secure coding practices. Developers should enforce strict allow-listing for file names and paths, ensuring that only expected alphanumeric characters and safe extensions are accepted. It is crucial to resolve all relative path references before accessing files, effectively canonicalizing the path to its absolute form and verifying that it remains within a predefined base directory or sandboxed environment. Additionally, employing chroot jails or containerization technologies can limit the impact of such vulnerabilities by restricting file system access at the operating system level. Regular security code reviews focusing on data flow analysis for file operations are essential to detect these patterns early in the development lifecycle. Furthermore, implementing principle of least privilege ensures that even if traversal is successful, the process lacks permissions to read highly sensitive files outside its designated scope.