CVE-2021-27766 Explained : Impact and Mitigation

A privilege escalation vulnerability, CVE-2021-27766 affects the BigFix Platform Client developed by HCL Software. Explore the impact, technical details, and mitigation strategies below.

Understanding CVE-2021-27766

CVE-2021-27766 is a vulnerability within the BigFix Platform Client that could enable a local user to escalate privileges. HCL Software promptly addressed this issue to enhance security.

What is CVE-2021-27766?

The CVE-2021-27766 vulnerability in the BigFix Platform Client installer, created with InstallShield, allowed local users to perform privilege escalation. Upgrading to a patched version mitigates this risk.

The Impact of CVE-2021-27766

With a CVSS base score of 6.7, classified as MEDIUM severity, the vulnerability primarily affects the confidentiality of the system. Attack vectors include low complexity and required user interaction.

Technical Details of CVE-2021-27766

The technical aspects of CVE-2021-27766 shed light on the vulnerability's description, affected systems, and exploitation mechanisms.

Vulnerability Description

CVE-2021-27766 stemmed from improper privilege management in the BigFix Platform Client installer, potentially allowing unauthorized users to elevate their access levels.

Affected Systems and Versions

HCL Software's BigFix Platform versions 9.5 to 9.5.18 and 10 to 10.0.5 are impacted by CVE-2021-27766. Users of these versions should apply the recommended patches.

Exploitation Mechanism

The vulnerability's exploitation required local access to the system, enabling threat actors to escalate privileges and potentially compromise system integrity.

Mitigation and Prevention

To safeguard against CVE-2021-27766 and similar vulnerabilities, users are advised to take immediate actions and adopt comprehensive security practices.

Immediate Steps to Take

Affected users should update their BigFix Platform Client to the patched version that addresses CVE-2021-27766. Implementing least privilege principles can also mitigate the risk of privilege escalation attacks.

Long-Term Security Practices

Establishing robust user access controls, monitoring system activities for suspicious behavior, and conducting regular vulnerability assessments are essential for comprehensive cybersecurity.

Patching and Updates

Regularly applying security patches and updates provided by HCL Software for the BigFix Platform is crucial in preventing exploitations of known vulnerabilities.