CVE-2020-11633 : Security Advisory and Response
Learn about CVE-2020-11633, a critical vulnerability in Zscaler Client Connector for Windows, allowing attackers to execute arbitrary code with system privileges. Find out how to mitigate this security risk.
The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack-based buffer overflow vulnerability when connecting to misconfigured TLS servers, potentially allowing an attacker to execute arbitrary code with system privileges.
Understanding CVE-2020-11633
This CVE identifies a critical security issue in the Zscaler Client Connector for Windows.
What is CVE-2020-11633?
The vulnerability in the Zscaler Client Connector for Windows could be exploited by an adversary to execute arbitrary code with system privileges.
The Impact of CVE-2020-11633
The vulnerability could lead to a severe security breach, enabling attackers to gain unauthorized access and control over affected systems.
Technical Details of CVE-2020-11633
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The Zscaler Client Connector for Windows prior to version 2.1.2.74 is susceptible to a stack-based buffer overflow when connecting to misconfigured TLS servers.
Affected Systems and Versions
- Product: Zscaler Client Connector for Windows
- Versions affected: Prior to 2.1.2.74
Exploitation Mechanism
The vulnerability can be exploited by connecting to misconfigured TLS servers, allowing an attacker to trigger a stack-based buffer overflow and potentially execute arbitrary code with system privileges.
Mitigation and Prevention
Protecting systems from CVE-2020-11633 requires immediate action and long-term security measures.
Immediate Steps to Take
- Update Zscaler Client Connector for Windows to version 2.1.2.74 or later.
- Ensure TLS servers are correctly configured to prevent exploitation.
Long-Term Security Practices
- Regularly update software and security patches to address vulnerabilities promptly.
- Implement network segmentation and access controls to limit the impact of potential breaches.
- Conduct regular security assessments and penetration testing to identify and mitigate security risks.
- Educate users on safe computing practices and the importance of cybersecurity awareness.
Patching and Updates
Zscaler has released version 2.1.2.74 to address the vulnerability. Users are advised to update to this version to mitigate the risk of exploitation.