CVE-2021-28821 Explained : Impact and Mitigation

A vulnerability labeled as CVE-2021-28821 was discovered in the Windows Installation component of TIBCO Enterprise Message Service, impacting versions 8.5.1 and below of the software. The vulnerability potentially allows a low privileged local attacker on certain Windows operating systems to insert and execute malicious software with elevated privileges.

Understanding CVE-2021-28821

This section will delve into the details of the CVE-2021-28821 vulnerability in TIBCO Enterprise Message Service.

What is CVE-2021-28821?

The CVE-2021-28821 vulnerability affects TIBCO Enterprise Message Service, TIBCO Enterprise Message Service - Community Edition, and TIBCO Enterprise Message Service - Developer Edition. It stems from a lack of access restrictions on specific files or folders during installation, enabling unauthorized software insertion and execution.

The Impact of CVE-2021-28821

The vulnerability's severity lies in the potential for an attacker to gain full access to the Windows operating system at the privilege level of the affected component, posing a significant security risk.

Technical Details of CVE-2021-28821

Let's explore the technical aspects of CVE-2021-28821 to understand the vulnerability better.

Vulnerability Description

The vulnerability allows a local attacker to insert and execute malicious software with elevated privileges due to inadequate access restrictions during installation of TIBCO Enterprise Message Service components.

Affected Systems and Versions

TIBCO Enterprise Message Service, TIBCO Enterprise Message Service - Community Edition, and TIBCO Enterprise Message Service - Developer Edition versions 8.5.1 and below are susceptible to this vulnerability.

Exploitation Mechanism

The flaw can be exploited by a low privileged attacker with local access on specific Windows operating systems, enabling them to abuse the affected component for unauthorized software execution.

Mitigation and Prevention

Protecting systems against CVE-2021-28821 requires immediate actions and long-term security practices to minimize risks effectively.

Immediate Steps to Take

Update TIBCO Enterprise Message Service to version 8.6.0 or higher to mitigate the vulnerability.

Long-Term Security Practices

Implement stringent access controls, regular security assessments, and employee awareness programs to enhance overall security posture.

Patching and Updates

Stay vigilant for security advisories and promptly apply patches and updates issued by TIBCO to address known vulnerabilities.