CVE-2024-25660 in TNMS
Summary
by MITRE • 10/01/2024
The WebDAV service in Infinera TNMS (Transcend Network Management System) 19.10.3 allows a low-privileged remote attacker to conduct unauthorized file operations, because of execution with unnecessary privileges.
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Analysis
by VulDB Data Team • 10/02/2024
The vulnerability identified as CVE-2024-25660 affects the WebDAV service component within Infinera TNMS version 19.10.3, representing a critical security flaw that enables low-privileged remote attackers to perform unauthorized file operations. This issue stems from the service executing with unnecessary privileges, creating an excessive permission model that violates the principle of least privilege. The WebDAV protocol implementation in this network management system exposes functionality that should be restricted to administrative users but instead allows any authenticated user to manipulate files within the system's file structure.
The technical root cause of this vulnerability lies in improper privilege management within the WebDAV service implementation. When the service processes file operations through WebDAV endpoints, it operates with elevated permissions beyond what is required for typical file access operations. This misconfiguration creates an attack surface where unauthorized users can leverage legitimate file operations to perform actions such as file creation, modification, deletion, or access to sensitive system files. The flaw specifically manifests when the system fails to properly validate user permissions before executing file system operations, allowing privilege escalation through legitimate WebDAV interfaces.
The operational impact of this vulnerability extends beyond simple unauthorized file access, as it provides attackers with the capability to manipulate critical network management data and potentially compromise the integrity of the entire system. Attackers can exploit this weakness to upload malicious files, modify configuration data, or delete essential system files that could disrupt network operations or provide persistent access to the system. The low-privileged nature of the attack means that even users with minimal system access can leverage this vulnerability, making it particularly dangerous in environments where multiple users have varying levels of access. This vulnerability directly impacts the confidentiality, integrity, and availability of the Infinera TNMS system, potentially leading to complete system compromise or denial of service conditions.
Security professionals should immediately implement mitigations including restricting WebDAV access to authorized administrative users only, implementing strict access controls for WebDAV endpoints, and ensuring that all file operations are performed with the minimum necessary privileges. The vulnerability aligns with CWE-276, which addresses improper privilege management, and represents a clear violation of the principle of least privilege that is fundamental to secure system design. Organizations should also consider implementing network segmentation to limit access to WebDAV services, deploying intrusion detection systems to monitor for suspicious file operations, and conducting regular privilege audits to ensure that services operate with appropriate access levels. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically targeting the execution of malicious code through legitimate system tools and interfaces. Remediation efforts must include patching the affected system to version 19.10.4 or later, which should address the unnecessary privilege execution issue and properly enforce access controls for WebDAV operations.