CVE-2020-14403 : Security Advisory and Response

An issue was discovered in LibVNCServer before 0.9.13. libvncserver/hextile.c allows out-of-bounds access via encodings.

Understanding CVE-2020-14403

This CVE identifies a vulnerability in LibVNCServer that could potentially lead to out-of-bounds access via encodings.

What is CVE-2020-14403?

CVE-2020-14403 is a security vulnerability found in LibVNCServer prior to version 0.9.13, allowing unauthorized out-of-bounds access through the hextile.c component.

The Impact of CVE-2020-14403

The exploitation of this vulnerability could result in unauthorized access to sensitive information, potential data corruption, or even remote code execution on affected systems.

Technical Details of CVE-2020-14403

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability in libvncserver/hextile.c allows attackers to gain unauthorized access beyond the boundaries permitted by the encoding mechanisms.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions Affected: N/A

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the encoding process in libvncserver/hextile.c to access unauthorized areas of memory.

Mitigation and Prevention

Protecting systems from CVE-2020-14403 requires immediate action and long-term security measures.

Immediate Steps to Take

Update LibVNCServer to version 0.9.13 or later to mitigate the vulnerability.
Monitor network traffic for any suspicious activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

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

Patching and Updates

Stay informed about security updates and advisories from LibVNCServer and relevant vendors.
Apply patches promptly to ensure systems are protected against known vulnerabilities.