CVE-2023-3078 in Universal Device Client
Summary
by MITRE • 08/17/2023
An uncontrolled search path vulnerability was reported in the Lenovo Universal Device Client (UDC) that could allow an attacker with local access to execute code with elevated privileges.
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Analysis
by VulDB Data Team • 08/17/2023
The Lenovo Universal Device Client represents a critical security vulnerability classified as CVE-2023-3078, which manifests as an uncontrolled search path vulnerability within the software architecture. This flaw exists in the manner by which the UDC application resolves and loads dynamic libraries or executables, creating a pathway for malicious code injection. The vulnerability stems from insufficient validation of library search paths, allowing an attacker to manipulate the system's library loading mechanism through carefully crafted file placements in predictable directories. Such a design oversight creates an exploitable condition where local privilege escalation becomes possible through the manipulation of the search path resolution process.
The technical implementation of this vulnerability aligns with CWE-427, which describes uncontrolled search path conditions where applications fail to properly control the search paths used to locate libraries or executables. The UDC application likely employs a default search order that includes user-writable directories without proper sanitization of the search path components. Attackers can exploit this by placing malicious DLL files in directories that are searched before legitimate system directories, causing the application to load and execute attacker-controlled code with the privileges of the UDC process. This mechanism operates under the principle of path traversal and library injection, where the application's trust in the default search path leads to arbitrary code execution.
Operationally, this vulnerability presents a significant risk to enterprise environments where the Lenovo UDC is deployed, as it requires only local access to exploit. The attack vector is particularly concerning because it can be initiated by any user with access to the system, potentially allowing a malicious insider or compromised local account to escalate privileges and gain administrative control. The impact extends beyond simple code execution to include potential persistence mechanisms and further lateral movement within the network. Organizations using UDC for device management, provisioning, or security enforcement are particularly vulnerable, as the compromised process could be leveraged to undermine the device's security posture and potentially compromise the broader enterprise infrastructure.
Mitigation strategies should prioritize immediate patch deployment from Lenovo, as the vendor has likely released a fix addressing the search path handling mechanism. System administrators should also implement additional controls such as restricting write access to directories in the library search path, enabling application control policies, and monitoring for suspicious library loading patterns. The solution aligns with ATT&CK technique T1068, which covers local privilege escalation through application misconfiguration, and T1548, covering abuse of system privileges. Organizations should conduct comprehensive vulnerability assessments to identify systems running vulnerable versions of UDC and implement least privilege principles to limit the potential impact of such an exploitation. Additionally, security monitoring should be enhanced to detect anomalous library loading behaviors that could indicate exploitation attempts, particularly focusing on processes that load libraries from non-standard or user-writable directories.