CVE-2017-2206 in Netizen
Summary
by MITRE
Untrusted search path vulnerability in the installer of SaAT Netizen ver.1.2.10.510 and earlier allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
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Analysis
by VulDB Data Team • 12/27/2020
The vulnerability identified as CVE-2017-2206 represents a critical untrusted search path issue within the installer component of SaAT Netizen version 1.2.10.510 and earlier releases. This flaw resides in the installation process where the software fails to properly validate or sanitize the directories from which it loads dynamic link library files. The vulnerability creates an exploitable condition where an attacker can place a malicious Trojan horse DLL in an unspecified directory that the installer will subsequently load and execute with elevated privileges. This type of vulnerability directly maps to CWE-426, which describes the insecure loading of dynamic libraries, and falls under the broader category of privilege escalation vulnerabilities.
The technical execution of this vulnerability exploits the principle of least privilege by leveraging the installer's trust in the system's PATH environment variable or hardcoded search directories. When the SaAT Netizen installer runs, it searches for required DLL components in a predetermined sequence of directories without proper validation of the source or integrity of these modules. An attacker who can write to any directory in this search path can place a malicious DLL that mimics a legitimate system component, causing the installer to load and execute the attacker-controlled code with the privileges of the user running the installer. This creates a persistent threat vector that can be exploited during software installation or update processes, potentially allowing attackers to establish backdoors or escalate their access level within the compromised system.
The operational impact of CVE-2017-2206 extends beyond simple privilege escalation, as it provides attackers with a method to execute arbitrary code within the context of the installer process. This vulnerability is particularly dangerous because it can be exploited during routine software maintenance operations, making detection more challenging for security monitoring systems. The attack vector aligns with ATT&CK technique T1059.001 for command and scripting interpreter and T1068 for exploit for privilege escalation, as the attacker leverages the legitimate installer process to execute malicious code. Organizations running affected versions of SaAT Netizen face significant risk of unauthorized access, data exfiltration, and potential system compromise. The vulnerability is especially concerning in enterprise environments where software installation processes are automated or where users have elevated privileges, as it can be used to bypass traditional security controls and establish persistent access to network resources.
Mitigation strategies for CVE-2017-2206 should focus on immediate patching of the affected software to version 1.2.10.511 or later, which contains the necessary fixes to properly validate DLL search paths. Security administrators should also implement strict access controls over system directories, particularly those in the PATH environment variable, and monitor for unauthorized file modifications in installation-related directories. The implementation of application whitelisting policies can prevent execution of unauthorized DLLs, while regular security audits should verify that no malicious DLLs exist in the system's search paths. Additionally, organizations should consider implementing security awareness training to prevent users from inadvertently executing malicious installers or allowing unauthorized modifications to system directories. The vulnerability demonstrates the critical importance of secure coding practices in installation components and the necessity of validating all external inputs, particularly in processes that operate with elevated privileges.