CVE-2018-7226 Explained : Impact and Mitigation

This CVE-2018-7226 article provides insights into a vulnerability found in the function vcSetXCutTextProc() in LinuxVNC and VNCommand, affecting versions up to 0.9.10 of the LibVNC/vncterm distribution.

Understanding CVE-2018-7226

This section delves into the details of the CVE-2018-7226 vulnerability.

What is CVE-2018-7226?

CVE-2018-7226 is a vulnerability in the function vcSetXCutTextProc() in LinuxVNC and VNCommand from the LibVNC/vncterm distribution up to version 0.9.10. The issue arises from the lack of proper sanitization of the client-specified message length, potentially leading to integer overflow or other unspecified consequences when a specially crafted VNC packet is utilized.

The Impact of CVE-2018-7226

The vulnerability in CVE-2018-7226 could result in integer overflow or other unspecified impacts if exploited through a specially crafted VNC packet.

Technical Details of CVE-2018-7226

This section provides technical details of CVE-2018-7226.

Vulnerability Description

The problem lies in the function vcSetXCutTextProc() in VNConsole.c in LinuxVNC and VNCommand from the LibVNC/vncterm distribution through version 0.9.10. The absence of sanitization for the client-specified message length may lead to an integer overflow or other potential impacts.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions affected: up to version 0.9.10

Exploitation Mechanism

The vulnerability can be exploited by using a specially crafted VNC packet to trigger integer overflow or other unspecified consequences.

Mitigation and Prevention

In this section, we discuss mitigation strategies for CVE-2018-7226.

Immediate Steps to Take

Update to the latest version of LibVNC/vncterm that contains a patch for the vulnerability.
Monitor vendor advisories for any specific instructions or patches.

Long-Term Security Practices

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

Patching and Updates

Ensure timely application of patches and updates provided by the software vendor to mitigate the CVE-2018-7226 vulnerability.