CVE-2017-6798 in Endpoint Sensor
Summary
by MITRE
Trend Micro Endpoint Sensor 1.6 before b1290 has a DLL hijacking vulnerability that allows remote attackers to execute arbitrary code, aka Trend Micro Vulnerability Identifier 2015-0208.
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Analysis
by VulDB Data Team • 09/05/2020
The vulnerability identified as CVE-2017-6798 represents a critical DLL hijacking flaw within Trend Micro Endpoint Sensor version 1.6 prior to build 1290. This vulnerability exposes the endpoint protection software to remote code execution attacks through improper dynamic link library loading mechanisms. The issue stems from the software's failure to properly validate and authenticate the sources of dynamically loaded libraries, creating an attack vector that adversaries can exploit to gain unauthorized system access.
The technical implementation of this vulnerability involves the improper handling of library loading paths within the Trend Micro Endpoint Sensor application. When the software attempts to load required dynamic link libraries, it does not enforce strict path validation or use secure loading mechanisms. Attackers can leverage this weakness by placing malicious DLL files in directories that are searched before the legitimate system directories, effectively hijacking the loading process. This behavior aligns with CWE-427 Uncontrolled Search Path Element, which describes how applications that search for libraries in insecure paths can be exploited through directory traversal attacks.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a persistent foothold within targeted networks. Remote attackers can craft malicious DLL files that will be loaded by the vulnerable Endpoint Sensor, potentially enabling them to escalate privileges, install backdoors, or establish command and control channels. The vulnerability's remote exploitability means that attackers do not require local access to the system, making it particularly dangerous in enterprise environments where endpoint protection software is widely deployed. This threat model corresponds to ATT&CK technique T1059 Command and Scripting Interpreter, as the compromised system can be used to execute malicious commands through the hijacked DLL loading process.
Organizations affected by this vulnerability face significant security risks, particularly in environments where Trend Micro Endpoint Sensor is deployed across multiple endpoints. The vulnerability's presence in a widely used security solution creates a paradoxical situation where the security tool itself becomes a potential attack vector. Mitigation strategies should prioritize immediate patching to build 1290 or later versions that address the DLL loading behavior. Additionally, system administrators should implement strict library loading policies and monitor for unauthorized DLL placements in critical directories. The vulnerability demonstrates the importance of secure coding practices and proper library loading mechanisms, reinforcing the need for comprehensive application security testing and adherence to secure development lifecycle principles.