CVE-2017-20107 in ShadeYouVPN.com
Summary
by MITRE • 06/28/2022
A vulnerability, which was classified as problematic, was found in ShadeYouVPN.com Client 2.0.1.11. Affected is an unknown function. The manipulation leads to improper privilege management. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. Upgrading to version 2.0.1.12 is able to address this issue. It is recommended to upgrade the affected component.
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Analysis
by VulDB Data Team • 05/08/2026
This vulnerability resides within the ShadeYouVPN.com Client version 2.0.1.11 where an improper privilege management flaw has been identified in an unspecified function. The vulnerability classification as problematic indicates a significant security concern that could potentially be exploited by malicious actors. The flaw specifically relates to privilege management, which falls under the broader category of access control vulnerabilities that can lead to unauthorized system access or elevated privileges. The requirement for local access to exploit this vulnerability suggests that an attacker must already have physical or network access to the target system, limiting the attack surface but not eliminating the risk entirely. This type of vulnerability is particularly concerning because it represents a failure in the application's ability to properly enforce access controls and privilege boundaries. The fact that the exploit has been publicly disclosed and is potentially usable means that threat actors can leverage this weakness without requiring advanced technical skills or expensive tools to carry out attacks. The vulnerability demonstrates a clear failure in the principle of least privilege, where the application does not adequately restrict user permissions or validate access rights before executing sensitive operations. This weakness can potentially allow an attacker with local access to escalate privileges or perform unauthorized actions within the application's context, undermining the security posture of the system.
The technical nature of this privilege management flaw suggests that the application may not properly validate user credentials, session tokens, or access permissions before allowing certain operations to proceed. This could manifest as insufficient input validation, improper authentication checks, or failure to enforce proper access control mechanisms within the application's code. The vulnerability's classification as affecting an unknown function indicates that the specific code path triggering the issue is not publicly detailed, which could complicate forensic analysis and remediation efforts. From a cybersecurity perspective, this vulnerability aligns with common weakness enumerations such as CWE-276, which deals with incorrect permissions for critical resources, or CWE-732, which covers inadequate permissions for critical resources. The attack vector requiring local access places this vulnerability in the context of privilege escalation attacks, where attackers seek to elevate their access level to gain administrative or root privileges. This type of vulnerability is particularly dangerous in environments where local access might be obtained through social engineering, physical compromise, or other initial attack vectors. The public disclosure of the exploit means that security researchers and threat actors have access to the techniques required to leverage this weakness, increasing the likelihood of exploitation.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially compromise the entire security framework of the affected system. When local privilege management fails, it can lead to unauthorized data access, system modification, or complete system compromise depending on the scope of privileges available to the compromised user. The vulnerability creates a potential entry point for attackers to gain unauthorized access to sensitive information or system resources that should be restricted. Organizations using this VPN client version face significant risk, particularly in environments where multiple users share systems or where local access might be obtained through various means. The vulnerability could be exploited to bypass security controls that are supposed to prevent unauthorized access to network resources, potentially allowing attackers to establish persistent access or conduct reconnaissance activities. This type of flaw can also serve as a stepping stone for more sophisticated attacks, where initial local access is used to gain broader network access or to move laterally within the system. The risk is amplified by the fact that the vulnerability affects the client application itself, which means that even if the server components are secure, local compromise of the client could still lead to broader security implications.
The recommended mitigation strategy involves upgrading to version 2.0.1.12, which should contain the necessary patches to address the privilege management flaw. This upgrade represents the most direct and effective solution to the vulnerability, as it replaces the vulnerable code with corrected implementations that properly enforce access controls and privilege boundaries. Organizations should prioritize this upgrade, especially in environments where local access to systems is possible or where the application is used in security-sensitive contexts. The upgrade process should be carefully planned and tested to ensure that it does not introduce compatibility issues or disrupt existing network operations. Security teams should also implement monitoring to detect any attempts to exploit this vulnerability before the upgrade is complete, as the public disclosure means that exploitation attempts may already be occurring. Additional mitigations could include implementing network segmentation to limit local access, enforcing strong access controls on system resources, and conducting regular security assessments to identify similar vulnerabilities. From an enterprise security perspective, this vulnerability highlights the importance of maintaining up-to-date security software and the risks associated with using outdated applications that may contain known vulnerabilities. The incident also underscores the need for comprehensive vulnerability management programs that include regular assessment of third-party software components and prompt response to security advisories. Organizations should also consider implementing additional layers of security controls such as application whitelisting, mandatory access controls, and privileged access management solutions to reduce the impact of such vulnerabilities. The vulnerability serves as a reminder that even seemingly minor access control issues can have significant security implications and that proper privilege management is fundamental to maintaining secure computing environments.