CVE-2019-8260 : What You Need to Know

A flaw has been identified in VNC client RRE decoder code in UltraVNC revision 1199, leading to an out-of-bounds read vulnerability due to multiplication overflow. This weakness is suspected to be exploitable through network connectivity. The issue has been addressed in revision 1200.

Understanding CVE-2019-8260

This CVE involves an out-of-bounds read vulnerability in UltraVNC revision 1199.

What is CVE-2019-8260?

The vulnerability is related to an out-of-bounds read caused by a multiplication overflow in the VNC client RRE decoder code of UltraVNC revision 1199.
It is suspected that this weakness can be exploited through network connectivity.

The Impact of CVE-2019-8260

Attackers could potentially exploit this vulnerability to execute arbitrary code or cause a denial of service.

Technical Details of CVE-2019-8260

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability in UltraVNC revision 1199 is an out-of-bounds read issue in the VNC client RRE decoder code, resulting from a multiplication overflow.

Affected Systems and Versions

Product: UltraVNC
Vendor: UltraVNC
Affected Version: 1.2.2.3

Exploitation Mechanism

The vulnerability can be exploited through network connectivity.

Mitigation and Prevention

Here are the steps to mitigate and prevent exploitation of CVE-2019-8260.

Immediate Steps to Take

Update UltraVNC to revision 1200 or the latest version that contains the fix.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update software and apply patches promptly.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Ensure that all systems running UltraVNC are updated to the patched version to prevent exploitation of the vulnerability.