CVE-2021-27756 Explained : Impact and Mitigation

This article discusses CVE-2021-27756, a vulnerability in BigFix Compliance Server versions up to 2.0.5 that could lead to sensitive data exposure through TLS-RSA cipher suites.

Understanding CVE-2021-27756

This section provides insights into the nature and impact of CVE-2021-27756.

What is CVE-2021-27756?

The vulnerability in BigFix Compliance Server versions up to 2.0.5 allows attackers to passively record traffic and decrypt it if TLS 2.0 and secure ciphers are not enabled.

The Impact of CVE-2021-27756

The vulnerability poses a risk of sensitive data exposure due to the inadequate disabling of TLS-RSA cipher suites in affected versions.

Technical Details of CVE-2021-27756

This section delves into the technical aspects of the CVE-2021-27756 vulnerability.

Vulnerability Description

TLS-RSA cipher suites are not properly disabled in BigFix Compliance Server versions up to 2.0.5, opening the door for potential data exposure.

Affected Systems and Versions

The vulnerability affects BigFix Compliance Server versions 2.0 to 2.0.5 inclusive.

Exploitation Mechanism

Attackers can exploit this vulnerability by capturing and later decrypting traffic if TLS 2.0 and secure ciphers are not enabled on the server.

Mitigation and Prevention

This section outlines steps to mitigate and prevent exploits related to CVE-2021-27756.

Immediate Steps to Take

Immediately enable TLS 2.0 and secure ciphers on the BigFix Compliance Server to prevent potential exposure to sensitive data.

Long-Term Security Practices

Adopt a proactive approach to security by regularly updating and patching systems to address vulnerabilities before they can be exploited.

Patching and Updates

Stay informed about security updates and patches released by HCL for BigFix Compliance Server to mitigate CVE-2021-27756 and other potential security risks.