CVE-2021-1536 Explained : Impact and Mitigation

A vulnerability in Cisco Webex Meetings Desktop App for Windows, Cisco Webex Meetings Server, Cisco Webex Network Recording Player for Windows, and Cisco Webex Teams for Windows could allow an authenticated, local attacker to perform a DLL injection attack on an affected device.

Understanding CVE-2021-1536

This CVE refers to a security vulnerability found in various Cisco Webex applications for Windows that could be exploited by an authenticated, local attacker to execute arbitrary code on the system.

What is CVE-2021-1536?

The vulnerability allows an attacker with valid credentials on a Windows system to conduct a DLL injection attack due to incorrect handling of directory paths at runtime.

The Impact of CVE-2021-1536

If successfully exploited, the attacker could execute arbitrary code on the affected system with the privileges of another user account.

Technical Details of CVE-2021-1536

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from incorrect handling of directory paths at runtime, enabling an attacker to perform DLL injection.

Affected Systems and Versions

Affected products include Cisco Webex Teams for Windows with a specific configuration.

Exploitation Mechanism

An attacker with valid credentials can insert a configuration file in a specific path in the system, loading a malicious DLL file during application startup.

Mitigation and Prevention

Here are some key steps to mitigate the vulnerability.

Immediate Steps to Take

Ensure all systems are updated with the latest security patches and restrict access to sensitive directories.

Long-Term Security Practices

Implement regular security training for users and maintain a proactive security posture against DLL injection attacks.

Patching and Updates

Regularly check for security updates from Cisco and apply them promptly to mitigate the risk of exploitation.