CVE-2021-39126 Explained : Impact and Mitigation

This CVE-2021-39126 pertains to Atlassian Jira Server and Data Center, exposing a vulnerability that allows remote attackers to manipulate resources through a Cross-Site Request Forgery (CSRF) flaw.

Understanding CVE-2021-39126

This vulnerability was made public on September 14, 2021, with a significant impact on affected versions of Atlassian Jira Server and Data Center.

What is CVE-2021-39126?

The CVE-2021-39126 vulnerability in Jira Server and Data Center enables attackers to modify resources by exploiting a CSRF vulnerability alongside an Information Disclosure flaw.

The Impact of CVE-2021-39126

The vulnerability enables remote attackers to alter various resources within the affected versions of Jira Server and Data Center.

Technical Details of CVE-2021-39126

This section delves into the specific technical details of the CVE-2021-39126 vulnerability.

Vulnerability Description

The flaw allows attackers to conduct unauthorized modifications to resources due to CSRF and Information Disclosure issues.

Affected Systems and Versions

Atlassian Jira Server before version 8.5.10
Atlassian Jira Server from version 8.6.0 to 8.13.1
Atlassian Jira Data Center before version 8.5.10
Atlassian Jira Data Center from version 8.6.0 to 8.13.1

Exploitation Mechanism

The vulnerability arises due to a combination of CSRF vulnerability and Information Disclosure flaw, providing attackers the ability to manipulate resources.

Mitigation and Prevention

Understanding how to mitigate and prevent the CVE-2021-39126 vulnerability is crucial.

Immediate Steps to Take

Upgrade Atlassian Jira Server and Data Center to versions 8.5.10 and above
Implement CSRF protection mechanisms
Educate users on CSRF risks and prevention techniques

Long-Term Security Practices

Regularly update and patch Jira Server and Data Center
Conduct security audits and vulnerability assessments
Monitor and analyze web traffic for potential CSRF attempts

Patching and Updates

Ensure timely installation of patches and updates released by Atlassian
Stay informed about security advisories and best practices to safeguard against CSRF vulnerabilities