CVE-2020-14405 : What You Need to Know

An issue was discovered in LibVNCServer before 0.9.13. libvncclient/rfbproto.c does not limit TextChat size.

Understanding CVE-2020-14405

An issue in LibVNCServer that could potentially lead to security vulnerabilities.

What is CVE-2020-14405?

CVE-2020-14405 is a vulnerability found in LibVNCServer before version 0.9.13, specifically in the file libvncclient/rfbproto.c. The vulnerability arises from the lack of size limitation on TextChat.

The Impact of CVE-2020-14405

This vulnerability could be exploited by an attacker to potentially cause a denial of service (DoS) or execute arbitrary code on the affected system.

Technical Details of CVE-2020-14405

Details regarding the vulnerability and its implications.

Vulnerability Description

The issue in LibVNCServer allows for unbounded TextChat size, which can be abused by a malicious actor.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: Not applicable

Exploitation Mechanism

The lack of size limitation on TextChat in libvncclient/rfbproto.c can be exploited by an attacker to trigger a DoS condition or potentially execute arbitrary code.

Mitigation and Prevention

Measures to address and prevent the CVE-2020-14405 vulnerability.

Immediate Steps to Take

Update LibVNCServer to version 0.9.13 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Ensure timely installation of security patches and updates provided by LibVNCServer to address CVE-2020-14405.