CVE-2020-11634 : Exploit Details and Defense Strategies

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability that could allow a local adversary to execute arbitrary code in the SYSTEM context.

Understanding CVE-2020-11634

This CVE identifies a security issue in the Zscaler Client Connector for Windows.

What is CVE-2020-11634?

The vulnerability in the Zscaler Client Connector for Windows before version 2.1.2.105 is due to a DLL hijacking vulnerability resulting from the configuration of OpenSSL. This flaw could enable a local attacker to run arbitrary code with SYSTEM privileges.

The Impact of CVE-2020-11634

The vulnerability could be exploited by a local adversary to execute malicious code on the affected system, potentially leading to unauthorized access or system compromise.

Technical Details of CVE-2020-11634

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in the Zscaler Client Connector for Windows is a DLL hijacking issue caused by the OpenSSL configuration, allowing for arbitrary code execution in the SYSTEM context.

Affected Systems and Versions

Product: Zscaler Client Connector for Windows
Versions affected: Prior to 2.1.2.105

Exploitation Mechanism

The vulnerability can be exploited locally by manipulating the DLL loading process to execute malicious code in the SYSTEM context.

Mitigation and Prevention

Protect your systems from CVE-2020-11634 with the following measures.

Immediate Steps to Take

Update Zscaler Client Connector to version 2.1.2.105 or later.
Monitor system activity for any signs of unauthorized code execution.

Long-Term Security Practices

Implement the principle of least privilege to restrict access rights.
Regularly audit and update software components to address security vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Zscaler promptly to mitigate the vulnerability.