CVE-2018-20023 : Security Advisory and Response

A detailed description of the CVE-2018-20023 vulnerability, its impact, technical details, and mitigation strategies.

Understanding CVE-2018-20023

CVE-2018-20023 is a vulnerability in the LibVNC software that can lead to information disclosure.

What is CVE-2018-20023?

The version of LibVNC prior to commit 8b06f835e259652b0ff026898014fc7297ade858 has a vulnerability known as CWE-665: Improper Initialization. This vulnerability is present in the VNC Repeater client code, allowing attackers to access stack memory and potentially disclose information.

The Impact of CVE-2018-20023

By exploiting this vulnerability, attackers can potentially access sensitive information and bypass ASLR, compromising the security and confidentiality of data.

Technical Details of CVE-2018-20023

CVE-2018-20023 involves the following technical aspects:

Vulnerability Description

LibVNC before commit 8b06f835e259652b0ff026898014fc7297ade858 contains the CWE-665 vulnerability in the VNC Repeater client code, enabling attackers to read stack memory and disclose information.

Affected Systems and Versions

Affected Version: commit 8b06f835e259652b0ff026898014fc7297ade858

Exploitation Mechanism

Attackers can exploit this vulnerability to access stack memory and potentially leak sensitive information.

Mitigation and Prevention

Learn how to protect your system from CVE-2018-20023:

Immediate Steps to Take

Update LibVNC to the latest version to patch the vulnerability.
Implement network security measures to prevent unauthorized access.

Long-Term Security Practices

Regularly update software and security patches to protect against known vulnerabilities.
Conduct security audits and assessments to identify and address potential weaknesses.

Patching and Updates

Stay informed about security advisories and apply patches promptly to secure your system.