CVE-2021-27786 Explained : Impact and Mitigation

This article provides details about CVE-2021-27786, a vulnerability found in HCL OneTest Server related to Cross-origin resource sharing (CORS).

Understanding CVE-2021-27786

This section delves into the nature of the vulnerability and its potential impact.

What is CVE-2021-27786?

The CVE-2021-27786 vulnerability in HCL OneTest Server allows attackers to exploit Cross-Origin Resource Sharing (CORS) to perform controlled cross-domain requests, potentially granting access to sensitive information.

The Impact of CVE-2021-27786

The vulnerability can enable attackers to execute privileged actions and access confidential data when Access-Control-Allow-Credentials is enabled.

Technical Details of CVE-2021-27786

Explore the specifics of the vulnerability including affected systems, exploitation mechanism, and more.

Vulnerability Description

HCL OneTest Server versions 10.0, 10.1, and 10.2 are affected, presenting a risk of unauthorized data access through CORS mechanisms.

Affected Systems and Versions

The vulnerability impacts HCL OneTest Server versions 10.0, 10.1, and 10.2, leaving them exposed to potential exploitation.

Exploitation Mechanism

By leveraging the Cross-Origin Resource Sharing (CORS) mechanism, threat actors could potentially carry out malicious activities and compromise sensitive data.

Mitigation and Prevention

Discover the steps to mitigate the CVE-2021-27786 vulnerability and enhance overall security.

Immediate Steps to Take

It is advised to disable Access-Control-Allow-Credentials in affected versions of HCL OneTest Server and monitor for any unauthorized access.

Long-Term Security Practices

Implement secure CORS policies, regularly update software, and conduct security assessments to prevent future vulnerabilities.

Patching and Updates

Ensure that HCL OneTest Server is updated to the latest secure version to mitigate the risks associated with CVE-2021-27786.