CVE-2021-27765 : What You Need to Know

The CVE-2021-27765 vulnerability affects the HCL BigFix Platform Server API, leading to Privilege Escalation. This article provides insights into the nature of the vulnerability, its impacts, technical details, and mitigation steps.

Understanding CVE-2021-27765

This section delves into the specifics of the CVE-2021-27765 vulnerability affecting the HCL BigFix Platform Server API.

What is CVE-2021-27765?

The vulnerability arises from the BigFix Server API installer, which utilizes InstallShield. It was impacted by CVE-2021-41526, enabling a local user to execute privilege escalation. The issue was resolved by updating to a fixed InstallShield version.

The Impact of CVE-2021-27765

The vulnerability possesses a CVSS base score of 6.7, with a medium severity rating. It could result in high data confidentiality impact, although the availability impact is none.

Technical Details of CVE-2021-27765

This section discusses the technical aspects of CVE-2021-27765.

Vulnerability Description

The vulnerability allows a local user to elevate privileges through the BigFix Server API installer due to issues in InstallShield.

Affected Systems and Versions

Affected versions include BigFix Platform 9.5 to 9.5.18 and 10 to 10.0.5.

Exploitation Mechanism

The vulnerability requires low attack complexity and privileges, with user interaction needed, targeting the local attack vector.

Mitigation and Prevention

Here are the steps to mitigate and prevent CVE-2021-27765 exploitation.

Immediate Steps to Take

Immediately update the BigFix Platform to versions where the InstallShield vulnerability is patched.

Long-Term Security Practices

Implement a comprehensive privilege management system and regularly update software components.

Patching and Updates

Stay vigilant for security updates from HCL Software and apply them promptly to secure the BigFix Platform.