CVE-2017-9648 in WATTConfig M Software
Summary
by MITRE
An Uncontrolled Search Path Element issue was discovered in Solar Controls WATTConfig M Software Version 2.5.10.1 and prior. An uncontrolled search path element has been identified, which could allow an attacker to execute arbitrary code on a target system using a malicious DLL file.
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Analysis
by VulDB Data Team • 11/07/2019
The vulnerability identified as CVE-2017-9648 represents a critical uncontrolled search path element flaw within Solar Controls WATTConfig M Software Version 2.5.10.1 and earlier releases. This type of vulnerability falls under the CWE-427 category, which specifically addresses uncontrolled search path elements that can lead to arbitrary code execution. The software's failure to properly validate or control the search path used to locate dynamic link library files creates a dangerous condition where malicious actors can manipulate the system's loading behavior. The flaw stems from the application's improper handling of library search paths, allowing attackers to place malicious DLL files in locations that the software will automatically load without proper verification.
The technical implementation of this vulnerability exploits the inherent trust model within the software's dynamic library loading mechanism. When the WATTConfig M software executes, it follows a predetermined search order to locate required DLL files, but this search process does not adequately validate the source or authenticity of the loaded libraries. An attacker can leverage this weakness by placing a specially crafted malicious DLL file in a directory that appears earlier in the search path than the legitimate system directories. This allows the malicious code to be loaded and executed with the privileges of the running application, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with a pathway for persistent system compromise and privilege escalation. The vulnerability affects the software's ability to maintain secure library loading practices, creating opportunities for attackers to perform various malicious activities including data exfiltration, system reconnaissance, and further lateral movement within network environments. The vulnerability is particularly concerning because it operates at the system level, meaning that successful exploitation could allow attackers to gain unauthorized access to sensitive industrial control systems that are typically considered critical infrastructure components.
Mitigation strategies for CVE-2017-9648 should focus on implementing proper search path controls and application hardening techniques. Organizations should immediately update to the latest version of Solar Controls WATTConfig M software where the vulnerability has been patched. Additionally, system administrators should implement security controls such as enforcing strict library loading paths, using application whitelisting solutions, and implementing proper access controls to prevent unauthorized DLL placement. The vulnerability aligns with ATT&CK technique T1059.001 for command and script interpreter usage, as attackers may leverage the executed malicious code for further system exploitation. Network segmentation and monitoring of unusual DLL loading activities can help detect potential exploitation attempts and provide early warning of compromise.