CVE-2018-20020 : What You Need to Know

LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d contains a heap out-of-bound write vulnerability in the VNC client code, potentially leading to remote code execution.

Understanding CVE-2018-20020

This CVE involves a vulnerability in LibVNC that could allow an attacker to execute remote code by exploiting a heap out-of-bound write issue.

What is CVE-2018-20020?

The vulnerability in LibVNC, before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d, allows for a heap out-of-bound write within a structure, which can be exploited to achieve remote code execution.

The Impact of CVE-2018-20020

Exploiting this vulnerability could result in an attacker executing arbitrary code remotely, potentially compromising the affected system.

Technical Details of CVE-2018-20020

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability lies in the VNC client code of LibVNC before commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d, where a heap out-of-bound write can occur within a structure.

Affected Systems and Versions

Product: LibVNC
Version: commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d

Exploitation Mechanism

The vulnerability can be exploited by triggering a heap out-of-bound write within the affected structure, potentially leading to remote code execution.

Mitigation and Prevention

Protecting systems from CVE-2018-20020 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor vendor advisories and security mailing lists for updates.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and mitigate risks.
Educate users on safe computing practices and the importance of security updates.

Patching and Updates

Ensure that the LibVNC software is updated to a version beyond commit 7b1ef0ffc4815cab9a96c7278394152bdc89dc4d to mitigate the vulnerability effectively.