CVE-2020-3588 : Security Advisory and Response

A vulnerability in virtualization channel messaging in Cisco Webex Meetings Desktop App for Windows could allow a local attacker to execute arbitrary code on a targeted system.

Understanding CVE-2020-3588

This CVE involves a critical vulnerability in the Cisco Webex Meetings Desktop App that could lead to arbitrary code execution.

What is CVE-2020-3588?

The vulnerability allows a local attacker to execute arbitrary code on a targeted system by sending malicious messages through the virtualization channel interface.
It occurs when the app is deployed in a virtual desktop environment and using virtual environment optimization.

The Impact of CVE-2020-3588

CVSS Score: 7.3 (High Severity)
Attack Vector: Local
Confidentiality, Integrity, and Availability Impact: High
User Interaction: Required
Scope: Unchanged
The vulnerability could enable an attacker to modify the operating system configuration and execute code with the privileges of a targeted user.

Technical Details of CVE-2020-3588

Vulnerability Description

Improper validation of messages processed by the Cisco Webex Meetings Desktop App.

Affected Systems and Versions

Affected Product: Cisco Webex Meetings Desktop App
Vendor: Cisco
Affected Version: n/a

Exploitation Mechanism

A local attacker with limited privileges can exploit the vulnerability by sending malicious messages through the virtualization channel interface.

Mitigation and Prevention

Immediate Steps to Take

Disable the virtual desktop plug-in for thin clients if not essential.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update the Cisco Webex Meetings Desktop App to the latest version.
Educate users on the risks of opening files or links from untrusted sources.

Patching and Updates

Apply patches provided by Cisco to address the vulnerability.